IEC 60570:2003

IEC 60570 ®
Edition 4.1 2017-04
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electrical supply track systems for luminaires

Systèmes d'alimentation électrique par rail pour luminaires

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IEC 60570 ®
Edition 4.1 2017-04
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electrical supply track systems for luminaires

Systèmes d'alimentation électrique par rail pour luminaires

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.20; 29.140.40 ISBN 978-2-8322-4225-4

IEC 60570 ®
Edition 4.1 2017-04
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Electrical supply track systems for luminaires

Systèmes d'alimentation électrique par rail pour luminaires

– 2 – IEC 60570:2003+AMD1:2017 CSV
 IEC 2017
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references. 5
3 Terms and definitions . 5
4 Classification . 7
5 General test requirements . 7
6 Marking . 8
7 General requirements and ratings . 10
8 Construction . 10
9 Creepage distances and clearances . 13
10 Terminals . 14
11 External and internal wiring . 14
12 Thermal endurance and operating temperatures . 14
13 Protection against electric shock . 15
14 Resistance to humidity . 16
15 Insulation resistance and electric strength . 16
16 Provision for earthing . 16
17 Resistance to heat, fire and tracking . 17
18 Terminals and connections for external wiring . 17

Figure 1 – Luminaire track systems (definitions) . 19
Figure 2 – Measurement positions for typical class III adaptor contacts . 19
Figure 3 – Measurement positions for typical class I tracks . 20

 IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
ELECTRICAL SUPPLY TRACK SYSTEMS FOR LUMINAIRES
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
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with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
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consensus of opinion on the relevant subjects since each technical committee has representation from all
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This consolidated version of the official IEC Standard and its amendment has been prepared
for user convenience.
IEC 60570 edition 4.1 contains the fourth edition (2003-01) [documents 34D/770/FDIS and
34D/774/RVD] and its amendment 1 (2017-04) [documents 34D/1221/CDV and 34D/1242A/RVC].
In this Redline version, a vertical line in the margin shows where the technical content is
modified by amendment 1. Additions are in green text, deletions are in strikethrough red text. A
separate Final version with all changes accepted is available in this publication.

– 4 – IEC 60570:2003+AMD1:2017 CSV
 IEC 2017
International Standard IEC 60570 has been prepared by subcommittee 34D: Luminaires, of IEC
technical committee 34: Lamps and related equipment.
This fourth edition constitutes a minor revision.
This standard shall be used in conjunction with IEC 60598-1.
NOTE In this standard, the following print types are used:
− requirements proper: in roman type;
− test specifications: in italic type;
− notes: in smaller roman type.

The committee has decided that the contents of the base publication and its amendment will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

 IEC 2017
ELECTRICAL SUPPLY TRACK SYSTEMS FOR LUMINAIRES

1 Scope
This International Standard applies to the following track systems with two or more poles for
the connection of luminaires to the electrical supply consisting of, either
– a system with a rated voltage not exceeding 440 V between poles (live conductors) with
provision for earthing (class I) and a rated current not exceeding 16 A per conductor, or
– a SELV system with a rated voltage not exceeding 25 V a.c. or 60 V d.c. without provision
for earthing (class III) and a rated current not exceeding 25 A per conductor, or
– a combination of the two systems mentioned above (mixed supply system) for the
connection of both mains voltage luminaires (class I or II) and SELV supplied luminaires
(class III) simultaneously, but in different sector openings (mains or SELV).
The track systems may also provide for the mechanical support of the luminaires.
It applies to track systems designed for ordinary interior use for mounting on, or flush with, or
suspended from walls and ceilings. These track systems are not intended for locations where
special conditions prevail as in ships, vehicles and the like and in hazardous locations,
for example, where explosions are liable to occur.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60417-2, Graphical symbols for use on equipment – Part 2: Symbol originals
IEC 60598-1:1999, Luminaires – Part 1: General requirements and tests
IEC 61032:1997, Protection of persons and equipment by enclosures – Probes for verification
3 Terms and definitions
For the purposes of this standard, the definitions of section one of IEC 60598-1 apply, together
with the following definitions.
NOTE The use of the term luminaire (see IEC 60598-1) hereinafter also includes components of the luminaire
track system.
3.1
luminaire track system
system, including a track with conductors, for the connection of luminaires to an electrical
supply in a range of different positions determined only by the length and location of the track
and comprising some or all of the components defined in 3.2 to 3.14 (see also Figure 1)

– 6 – IEC 60570:2003+AMD1:2017 CSV
 IEC 2017
3.2
track
generally linear assembly of conductors within a housing providing the electrical connection
and in most instances mechanical support of luminaires
NOTE Luminaires can be positioned or repositioned along the length of track in a simple manner (that is, without
the use of tools).
3.3
track* coupler
component enabling electrical or mechanical connection to be made between tracks, but
electrically only on the same sector opening (mains voltage or SELV)
3.4
track* supply connector
component used for the electrical connection of a supply to the track system, but always
operating on one sector opening only
NOTE 1 The function of a coupler and a track supply connector may be combined.
NOTE 2 For the SELV sector, the track supply connector may incorporate a SELV convertor or safety isolating
transformer supplied directly from the mains voltage sector.

3.5
luminaire supply connector
component for the electrical connection of a luminaire to the track. A connector does not
provide mechanical connection of a luminaire to the track
The electrical connection shall operate on one sector only (mains or SELV)
3.6
*
track adaptor
component used for the electrical and mechanical connection of a luminaire to the track, but
electrically and mechanically only on the same sector opening (mains voltage or SELV)
NOTE An adaptor may incorporate a switch or a fuse.

3.7
track* suspension device
component used for the mechanical connection of the track system to the supporting surface
3.8
luminaire suspension device
component used for the mechanical connection of a luminaire to the track
3.9
end cover
component intended to be fixed at the end of a track, providing electrical and mechanical
protection of the ends of the conductors
3.10
class I track
generally linear assembly of conductors and housing designed to be operated from a mains
voltage supply providing the electrical connection and in most instances mechanical support of
class I and class II luminaires only.
___________
* The word ‘track’ is occasionally not repeated in the text of the standard where these definitions are used.

 IEC 2017
3.11
class III track
generally linear assembly of conductors and housing designed to be operated from a SELV
supply providing the electrical connection and in most instances mechanical support of class III
luminaires only
NOTE A class III SELV supplied system or a SELV sector opening need not have insulation to protect against
contact with current-carrying parts, due to its inherently safe nature.
3.12
mixed supply track system – classes I and III
combination of tracks according to 3.10 and 3.11
3.13
rated current
current assigned to the track or the component by the manufacturer
3.14
*
track sector opening
opening in the track enabling the electrical connection of the adaptor or the luminaire supply
connector to the track conductors
4 Classification
Luminaire track systems shall be either class I, class III or a mixed supply track system with
class I and class III sectors in accordance with the provisions of section two of IEC 60598-1.
Track systems shall only be classified as ordinary.
Luminaire/adaptor assemblies that are inseparable can be class II in accordance with the
provisions of section two of IEC 60598-1 provided they contain no earthing facilities.
Separate adaptors shall not be classified as class II, but may be used with class II luminaires.
5 General test requirements
5.1 The requirements and tests of this standard shall not be applied to equipment already
subject to its own separate IEC standard.
5.2 Tests according to this standard are type tests.
One test sample as described in 5.3 shall be subjected to all relevant tests.
In order to reduce the time of testing and to allow for any tests which may be destructive, the
manufacturer may submit additional samples or parts of samples provided that these are of the
same materials as the original sample and that the results of the test are the same as if carried
out on a single sample.
5.3 Unless otherwise specified, the sample is tested as delivered and under the most
unfavourable conditions of use taking into account the manufacturer's instructions, at an
ambient temperature of between 10 °C and 30 °C.
___________
* The word ‘track’ is occasionally not repeated in the following text where these definitions are used.

– 8 – IEC 60570:2003+AMD1:2017 CSV
 IEC 2017
The minimum test sample of a class I or a class III track shall include the following items. For a
mixed supply system the minimum sample quantities stated are required for both class I and
class III sectors:
a) where a track system provides for interconnection between track lengths, at least 3 sections
of track comprising a total length when assembled together of not less than 2,4 m and
including 1 section of maximum length as indicated in the manufacturer's literature. Where
interconnection is not provided for, only 1 track section of maximum length is required;
b) 1 track supply connector;
c) 1 end cover (if required);
d) 1 coupler per length of track supplied (if applicable) (minimum of 3);
e) 1 adaptor per length of track supplied (minimum of 3);
f) 1 luminaire supply connector per length of track supplied (if applicable) (minimum of 3);
g) the necessary suspension devices and any other components as specified by the
manufacturer in his installation instructions;
h) a typical luminaire representing the most unfavourable combination from a testing point of
view for the purpose of the test of clause 11;
i) additionally with a class III test sample, one selection of track of each type of class I track
made by the same manufacturer.
NOTE Item i) is required for the tests of 8.1.1 when testing a class III track.
5.4 Unless otherwise specified, the tests are carried out in the order of the clauses.
6 Marking
The provisions of section three of IEC 60598-1 apply together with the requirements in 6.1
to 6.7.
6.1 The track shall be marked with rated current (A), rated voltage (V) and the graphical
symbol IEC 60417-5180 for class III equipment if appropriate.
A mixed supply system shall be marked with rated current (A), rated voltage (V) on the mains
voltage sector and on the SELV sector respectively. The SELV sector shall also be marked with
the symbol for class III.
6.2 Adaptors need only be marked with their rated current, rated voltage, manufacturer's
name or trade mark and type reference and the graphical symbol IEC 60417-5180 for class III
equipment if appropriate.
Adaptors and luminaire supply connectors incorporated in luminaires do not require marking
additional to that of the luminaire.
If the adaptor has a fuse incorporated, the rated current and type of fuse shall be marked on
the body of the adaptor.
6.3 Couplers and connectors need only be marked with the manufacturer's name or trade
mark and type reference and the graphical symbol IEC 60417-5180 for class III equipment if
appropriate.
Luminaire supply connectors not incorporated in the luminaire shall, in addition, be marked with
rated current and rated voltage.

 IEC 2017
6.4 Marking of the rated current and the rated voltage of the track system shall be easily
discernible during and after installation of the track system.
NOTE National wiring rules may require that adaptors do not have a lower maximum current rating than the track
system.
6.5 In addition to the above markings the following details, if they are necessary to ensure
proper use and maintenance, shall be given either on the luminaire track system or in the
manufacturer's instructions supplied with it:
a) details of the maximum mechanical loading for which each section of the track system and
luminaire suspension devices are suitable, inclusive of the weight of luminaires and
accessories. In addition, a warning that the mechanical loading shall be intended as the
complete loading of the whole system.
b) a warning if the components are unsuitable for the connection of inductive loads, or de-
rating for inductive loads if appropriate;
c) the maximum permissible track temperature under normal operating conditions if different
from 70 °C;
d) a warning that it is the user's responsibility to ensure electrical, mechanical and thermal
compatibility between the track system and luminaires attached to it.
Mounting instructions supplied with the adaptor shall state the track system on which it may be
used and warnings shall be given that the use is limited to the track system specified.
6.6 In addition to the above markings and information, the following details shall be given in
the manufacturer's instructions supplied with class III and mixed supply track systems;
a) a warning that the class III system or sector opening should only be connected to a SELV
supply designed for operating class III equipment;
b) where there is an associated safety isolating transformer, adequate instruction regarding
the correct method of connection of the transformer terminals to avoid misinterpretation of
the primary and secondary terminals;
c) a warning that class III luminaire track systems/sectors openings and components are not
compatible with class I track systems and that class III luminaire connectors/adaptors
should not be used on other manufacturer's track systems;
d) instructions concerning suitable means for overload and short-circuit protection of the SELV
circuit;
NOTE The means of protection should meet the requirements of IEC 60364-7-715: Electrical installations of
buildings – Extra-low voltage lighting installations.
e) the minimum cross-sectional area and maximum length of the supply cable between
transformer and track supply connector.
6.7 The instruction leaflet for class III track systems/sector openings shall contain the
following warning:
CAUTION: TO REDUCE THE RISK OF OVERHEATING AND FIRE
DO NOT BRIDGE CONDUCTORS
– 10 – IEC 60570:2003+AMD1:2017 CSV
 IEC 2017
7 General requirements and ratings
Track systems shall be so designed and constructed that in normal use they function safely
and minimize the risk of danger to persons and surroundings.
In general, compliance is checked by carrying out all tests specified.
The rated voltage between poles for a class I track system shall not exceed 440 V and for a
class III system the rated voltage shall not exceed 25 V a.c. or 60 V d.c. The current rating for
a class I track system shall be maximum 16 A and for a class III system it shall be maximum
25 A. For a combined system the rated current of each sector opening shall not exceed the
values given for a class I or a class III system respectively.
Compliance is checked by inspection.
8 Construction
The provisions of section four of IEC 60598-1 apply together with the requirements in 8.1
to 8.12.
8.1 Components for class I tracks shall be so designed that there is no risk of accidental
contact between the earthing contact of the component and the current-carrying parts of the
track during insertion and removal by the user.
This requirement does not apply during installation of the track system.
8.1.1 Adaptors, couplers and supply connectors shall be so constructed that electrical
connection with systems/sectors openings of other classes of tracks made by the same
manufacturer is effectively prevented.
8.2 Class I adaptors shall incorporate provision for mechanical connection to the track such
that the weight of the adaptor and/or luminaire is not supported by the electrical connections of
the adaptor and track.
The requirements of 16.3 shall also apply.
Class III adaptors shall incorporate provision for mechanical connection to the track such that
the weight of the adaptor and/or luminaire cannot impair electrical connection and safety.
8.2.1 When fuses are incorporated in adaptors they shall be of the high-breaking capacity type.
8.3 Contacts of adaptors shall not be removable without dismantling the adaptor. Also, it shall
not be possible to replace the earthing pins or contacts in an incorrect position and this
provision shall also apply to neutral pins or contacts where this is a safety requirement of the
method of construction of the system.
Where luminaires meet the requirements of class II and are provided with an integral adaptor
for connection to track systems, the adaptor may incorporate an earthing contact provided that,
when connected to the track, the requirements of class II for the luminaire are maintained.
Compliance is checked by inspection and by the electric strength test of 15.1.

 IEC 2017
8.4 Couplers, track supply connectors and end covers shall be capable of being mechanically
locked to the track. Couplers, connectors and adaptors shall ensure reliable electrical
connection.
Compliance with the requirements in 8.1 to 8.4 is checked by inspection, manual test and
where appropriate by the test in 12.1.
Compliance of 8.1.1 is checked by attempting to insert the adaptors, couplers and connectors
into the different samples of the track system/sector openings. There shall be no electrical
connection made.
8.5 Adjacent lengths of track shall be mechanically locked together in one of the following
ways:
a) with the aid of couplers;
b) by other separate means using the couplers only to align the tracks;
c) by rigidly fixing the length of track directly to the supporting surface in which case the
electrical contact shall be reliable when the ends of the track sections are separated
longitudinally by 1 mm and when they are separated by 1 mm at right angles to the
supporting surface.
NOTE A spacing at right angles to the supporting surface is specified in order to take account of unevenness of
the surface.
Compliance is checked by carrying out the tests with the track in this position.
8.6 Mechanical suspensions shall have adequate factors of safety. The tests in 4.14.1 of
IEC 60598-1 shall be replaced by the following tests for luminaire track system suspensions.
Compliance is checked by the following tests:
To test the suspension of both track and luminaires, suspension devices for luminaires,
including adaptors, are mounted on the track as in normal use and are subjected for 1 h to a
load equal to 5 times the specified load as claimed by the manufacturer, with a minimum value
of 50 N. This test shall be made at a temperature of t of the track +15 °C.
a
After the test, the components, the track and its fixing devices shall not be deformed to such an
extent as would impair safety and the components shall not have become detached from the
track.
For the purpose of the following bending test, which is an additional test of luminaire
suspension devices, the track is mounted on a horizontal surface.
The test shall be made at a temperature of t of the track +15 °C.
a
A bending moment of 2,5 Nm is then applied to the luminaire suspension device, the force
being applied for 1 min in a direction parallel to the track axis and for 1 min in a direction
perpendicular to this axis.
After the test, the luminaire suspension device and other parts of the track system shall not be
deformed to such an extent as would impair safety and the suspension device shall not have
become loose.
NOTE Additional tests may be required for track systems designed for use in low-temperature areas.
8.7 Tracks shall have adequate mechanical robustness.

– 12 – IEC 60570:2003+AMD1:2017 CSV
 IEC 2017
Compliance is checked by the following test:
A force of 30 N is applied to metal parts enclosing live parts by means of a test finger
according to Figure 6 of IEC 61032. During the test, the clearance distance between metal
parts and live parts shall be not less than the values given in clause 9.
8.8 Polarity
Where necessary for the correct operation of the system, means shall be provided throughout
to ensure that the correct polarity is maintained.
Compliance is checked by inspection.
8.9 Mechanical/electrical endurance
Components shall withstand, without excessive wear and other harmful effects, the
mechanical, electrical and thermal stresses occurring in normal use.
For adaptors and luminaire supply connectors, compliance is checked by the following tests in
which "an operation" is either the insertion or withdrawal of an adaptor or the making or
breaking of an electrical contact at a speed which corresponds to practical usage.
a) The mechanical support system is checked by 100 operations.
b) Electrical contacts which operate simultaneously with the mechanical fixing devices are
checked by 100 operations in the same position on the track.
c) Electrical contacts which are operated independently from the mechanical fixing devices
are checked by 1 000 operations. After each 100 operations the contacts shall be moved to
a fresh position on the track. This test is applicable only to adaptors.
d) Where the luminaire supply connector or adaptor for a class III track system/sector is
designed to be positioned along the axis of the track without being removed, it shall be
subject to 150 cycles of operation as described in 4.14.3 of IEC 60598-1.
The tests of items b) and c) are made with a.c. at rated voltage and the test current shall be
1,25 times the rated current of the component. The power factor of the load shall be
approximately 0,6 unless a different current rating is marked for resistor loads which are then
tested with a.c. in a non-inductive circuit. For class III systems, the power factor is taken as 1,0.
NOTE In the case of a dual rating (see item b) of 6.5), the more onerous condition should be applied.
If an air core inductor is used for the 0,6 power factor load, a resistor taking approximately 1 %
of the current through the inductor is connected in parallel with it. Iron core inductors may be
used, provided the current is of substantially sinusoidal waveform. No current is passed
through the earthing circuit.
After the test, the samples shall withstand an electric strength test made in accordance with
10.2 of IEC 60598-1, the test voltage however, being reduced to 1 500 V for components
operating at mains supply voltage and to 500 V for components operating at SELV.
The samples shall show:
a) no wear impairing their further use;
b) no deterioration of enclosures or barriers;
c) no loosening of electrical or mechanical connections.
Before and after the tests of this clause, the adaptor shall be mounted on the track and the
contacts loaded with 1,5 times the rated current of the adaptor. The voltage drop across each
contact, including the earth contact, shall not exceed 50 mV.

 IEC 2017
8.10 Short-circuit protection
8.10.1 For class I system/sector openings it shall not be possible to bridge track conductors
with the test probe D, according to IEC 60598-1.
Compliance is checked by the test of 9.2.0 of IEC 60598-1, using the test probe D application
force shown in Table 9.1.
8.10.2 The SELV class III track system/sector opening shall incorporate means to prevent
accidental short circuits between current-carrying parts of different polarity in the output circuit.
Adequate means shall be provided to prevent impairing of safety due to unintended short-
circuiting of uninsulated accessible SELV conductors of opposite polarity by the test chain
described in 4.26.3 of IEC 60598-1.
NOTE 1 Class III luminaires supplied from a separate unspecified SELV supply should have at least one
conductor insulated. Where insulation is not provided, the luminaire manufacturer should declare the maximum VA
output of the SELV source and the test should be conducted at this value.
NOTE 2 If the test chain cannot be hung on the track by itself, the test sample is deemed to comply with the test
requirement.
Compliance is checked by the test of 4.26.2 of IEC 60598-1.
8.11 The opening in the insulating liner of a class I track/track sector giving access to the
conductor shall have a maximum dimension of 3,0 mm and the conductor shall be recessed
into the insulating liner by at least 1,7 mm. The contacts of class III adaptors shall have a
minimum dimension of 3,5 mm in any orientation that can be presented to the conductor
opening in the insulating liner of any class I track/track sector.
NOTE For clarity, the dimensions of the class I tracks and the class III adaptor contacts are measured in the
positions shown in Figures 2 and 3.
Compliance is checked by measurements.
8.12 Care shall be taken in the design and manufacture of adaptors for use with a particular
track system to ensure interchangeability and safety in use. In particular, no connections
between live conductors and earth conductors shall be possible.
Tests shall be conducted with approved track samples retained by the test house or samples of
the approved track provided by the manufacturer.
The track and adaptor shall comply with all appropriate parts of the standard.
Compliance is checked by inspection and measurements.
9 Creepage distances and clearances
The provision of section eleven of IEC 60598-1 apply but with the modifications in 9.1 and 9.2.
9.1 For rewirable connectors and adaptors the measurements are made with and without
conductors of the largest cross-sectional area connected to the terminals.
For non-rewirable connectors and adaptors the measurements are made on the sample as
delivered.
Components are checked when wired and installed as in normal use and electrical connection
is made.
– 14 – IEC 60570:2003+AMD1:2017 CSV
 IEC 2017
9.2 For a mixed supply system the creepage distances and clearances between conductors
of mains voltage sector opening and SELV sector opening shall comply with Table 11.1 of
IEC 60598-1 regarding class II constructions for the maximum working voltage used.
10 Terminals
The provisions of sections fourteen and fifteen of IEC 60598-1 apply except that the use of
terminals mounted on floating contacts shall not be precluded provided their movement does
not impair correct operation.
Compliance is checked by inspection.
11 External and internal wiring
The provisions of section five of IEC 60598-1 apply but with the following modification:
A non-detachable cable or cord shall only be connected to a track section which cannot be
extended by other sections.
The cross-sectional area of the cable conductors must be compatible with the rated current of
the track section.
Compliance is checked by inspection.
12 Thermal endurance and operating temperatures
Luminaire track systems shall have adequate thermal endurance and shall not attain excessive
temperatures in conditions of normal use.
Compliance shall be checked by the tests in 12.1 to 12.3
12.1 Current-carrying parts of the track as installed shall be so designed as to prevent
excessive temperatures due to the passage of current.
Compliance is checked by the following test:
A typical luminaire in accordance with 0.4.2 of IEC 60598-1 and chosen to represent the
most onerous situation designed to be used with the track shall be mounted on it in
the most unfavourable position of normal use and electrically connected to it. The track
shall be further electrically loaded so as to pass a total current, including the current to the
luminaire, equal to its rated current, until a condition of thermal stability is reached or
for 1 h whichever is the longer.
Typical luminaires are mounted on the class I and class III sector openings.
The test shall be made at a temperature equal to the t of the track or at 25 °C if t is not
a a
marked.
The highest temperature of any part of the track shall be determined and the value obtained
shall not exceed the manufacturer's stated maximum track temperature under normal operating
conditions.
 IEC 2017
12.2 Components of a track system shall not attain excessive temperatures in normal use.
Temperatures of components excluding the track shall comply with the requirements of section
twelve of IEC 60598-1.
12.3 The thermal endurance of the track shall be checked by the following tests:
12.3.1 A 1,2 m length of track is mounted as in normal use, according to the manufacturer's
installation instructions, in a heating cabinet which is maintained for 168 h at a temperature
which is 10 °C in excess of the manufacturer's stated maximum track temperature under
normal operating condition, with a minimum of 80 °C or the t of the track +55 °C, whichever is
a
the greater.
After the test, the track shall show no visible signs of deterioration and any shrinkage of the
insulating liner shall be such that the track still complies with the relevant requirements of
clause 8 and 13.1 (steel probe, test finger, test chain, etc.) and the track shall comply with the
requirements of 15.1 (insulation resistance test).
12.3.2 For Class III track/sector openings a typical luminaire in accordance with 0.4.2 of
IEC 60598-1 and chosen to represent the most onerous situation designed to be used with the
track shall be mounted on it in the most unfavourable position of normal use and electrically
connected to it. For the supply cable the most unfavourable position shall be taken with the
cable bent sharply at the inlet opening as far as possible as the design permits. The track shall
be further electrically loaded so as to pass a total current, including the current to the
luminaire, equal to its rated current.
The track system is operated at its rated t plus 20 °C and the test is made in accordance with
a
12.3 of IEC 60598-1.
Following the test, in addition to complying with 12.3 of IEC 60598-1, the track supply
connector and couplers (if any) shall be loaded with 1,5 times the rated current of the track
system. The voltage drop across each contact of the connectors and/or couplers shall not
exceed 22,5 mV.
13 Protection against electric shock
The provisions of section eight of IEC 60598-1 apply together with the requirements of 13.1
to 13.3, except where the track system/sector openings is classified class III for operation from
a SELV supply.
13.1 Additionally, for track, compliance with 8.2.5 of IEC 60598-1 shall be checked by the
application of the test probe D, according to Table 9.1 of IEC 60598-1.
Compliance is checked by carrying out the test with the probe applied in every possible
direction. During the test the probe shall not touch live parts.
13.2 Adaptors shall be so designed that live parts are not touchable when the adaptor is in
partial or complete engagement and is wired as in normal use.
Compliance is checked by inspection and by a test with the standard test finger. This
...

IEC 60570 ®
Edition 4.2 2019-12
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
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Electrical supply track systems for luminaires

Systèmes d'alimentation électrique par rail pour luminaires

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IEC 60570 ®
Edition 4.2 2019-12
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electrical supply track systems for luminaires

Systèmes d'alimentation électrique par rail pour luminaires

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.20; 29.140.40 ISBN 978-2-8322-7729-4

IEC 60570 ®
Edition 4.2 2019-12
CONSOLIDATED VERSION
REDLINE VERSION
VERSION REDLINE
colour
inside
Electrical supply track systems for luminaires

Systèmes d'alimentation électrique par rail pour luminaires

– 2 – IEC 60570:2003+AMD1:2017
+AMD2:2019 CSV  IEC 2019
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Classification . 8
5 General test requirements . 8
6 Marking . 9
7 General requirements and ratings . 11
8 Construction . 11
9 Creepage distances and clearances . 16
10 Terminals . 17
11 External and internal wiring . 17
12 Thermal endurance and operating temperatures . 17
13 Protection against electric shock . 18
14 Resistance to humidity . 19
15 Insulation resistance and electric strength . 19
16 Provision for earthing . 19
17 Resistance to heat, fire and tracking . 20
18 Terminals and connections for external wiring . 20
Annex A (informative) Test to be carried out on luminaires supplied with track systems
providing control signals . 25

Figure 1 – Luminaire track systems (definitions) . 22
Figure 2 – Measurement positions for typical class III adaptor contacts . 22
Figure 3 – Measurement positions for typical class I tracks (not to scale) . 23
Figure 4 – Measurement positions for typical class III adaptor contacts with protruding
contacts . 24

+AMD2:2019 CSV  IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
ELECTRICAL SUPPLY TRACK SYSTEMS FOR LUMINAIRES
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This consolidated version of the official IEC Standard and its amendments has been
prepared for user convenience.
IEC 60570 edition 4.2 contains the fourth edition (2003-01) [documents 34D/770/
FDIS and 34D/774/RVD], its amendment 1 (2017-04) [documents 34D/1221/CDV and
34D/1242A/RVC] and its amendment 2 (2019-12) [documents 34D/1502/FDIS and
34D/1517/RVD].
In this Redline version, a vertical line in the margin shows where the technical
content is modified by amendments 1 and 2. Additions are in green text,
deletions are in strikethrough red text. A separate Final version with all changes
accepted is available in this publication.

– 4 – IEC 60570:2003+AMD1:2017
+AMD2:2019 CSV  IEC 2019
International Standard IEC 60570 has been prepared by subcommittee 34D: Luminaires, of
IEC technical committee 34: Lamps and related equipment.
This fourth edition constitutes a minor revision.
This standard shall be used in conjunction with IEC 60598-1.
NOTE In this standard, the following print types are used:
− requirements proper: in roman type;
− test specifications: in italic type;
− notes: in smaller roman type.

The committee has decided that the contents of the base publication and its amendments will
remain unchanged until the stability date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
+AMD2:2019 CSV  IEC 2019
ELECTRICAL SUPPLY TRACK SYSTEMS FOR LUMINAIRES

1 Scope
This International Standard applies to the following track systems with two or more poles for
the connection of luminaires to the electrical supply consisting of, either
– a system with a rated voltage not exceeding 440 V between poles (live conductors) with
provision for earthing (class I) and a rated current not exceeding 16 A per conductor, or
– a SELV system with a rated voltage not exceeding 25 V without provision for earthing
(class III) and a rated current not exceeding 25 A per conductor, or
– a SELV system without provision for protective earthing (class III) and a rated current not
exceeding 25 A per conductor, or
– a combination of the two systems mentioned above (mixed supply system) for the
connection of both mains voltage luminaires (class I or II) and SELV supplied luminaires
(class III) simultaneously, but in different sector openings (mains or SELV).
The track systems may also provide for the mechanical support of the luminaires.
It applies to track systems designed for ordinary interior use for mounting on, or flush with, or
suspended from walls and ceilings. These track systems are not intended for locations where
special conditions prevail as in ships, vehicles and the like and in hazardous locations,
for example, where explosions are liable to occur.
This document does not cover operational or performance compatibility between different
track systems. Protection against unsafe compatibility between Class I and Class III circuit is
covered by this document.
The track system can be provided with auxiliary circuits for the purpose of a control or audio
signal other than supply.
NOTE 1 At present, the following types of control systems are available on the market:
− control signal, with basic insulation to LV supply (e.g. digital addressable lighting interface, 1 V to 10 V DC
signal);
− control signal, SELV/PELV insulated to LV supply (e.g. DMX);
− control signal, not insulated to LV supply (e.g. push button control/phase cut/step dim).
Track systems can also be provided with conductors specifically identified for emergency
lighting luminaires.
NOTE 2 Requirements for PELV are under consideration, pending modification in IEC 60598-1.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60417-2, Graphical symbols for use on equipment – Part 2: Symbol originals
IEC 60598-1:19992014, Luminaires – Part 1: General requirements and tests
IEC 60598-1:2014/AMD1:2017
– 6 – IEC 60570:2003+AMD1:2017
+AMD2:2019 CSV  IEC 2019
th
NOTE The 9 edition of IEC 60598-1 is under preparation. Stage at the time of publication
th
IEC PRVC 60598-1:2019. This 9 edition provides a cross link between IEC 60598-1 and IEC 60570 for track
mounted luminaires.
IEC 60598-2-22:2014, Luminaires – Part 2-22: Particular requirements – Luminaires for
emergency lighting
IEC 60598-2-22:2014/AMD1:2017
IEC 61032:1997, Protection of persons and equipment by enclosures – Probes for verification
3 Terms and definitions
For the purposes of this standard, the definitions of section one of IEC 60598-1 apply,
together with the following definitions.
NOTE The use of the term luminaire (see IEC 60598-1) hereinafter also includes components of the luminaire
track system.
3.1
luminaire track system
system, including a track with conductors, for the connection of luminaires to an electrical
supply in a range of different positions determined only by the length and location of the track
and comprising some or all of the components defined in 3.2 to 3.14 (see also Figure 1)
Note 1 to entry: The track system may be provided with auxiliary circuits for the purpose of a control or audio
signal other than supply; the track system may be used to supply luminaires where the control signals are injected
via supply conductors or a circuit connected to the supply via separated conductors (e.g. powerline).
Note 2 to entry: The track system may be provided with circuits identified to ensure battery recharge (for self-
contained emergency luminaires).
3.2
track
generally linear assembly of conductors within a housing providing the electrical connection
and in most instances mechanical support of luminaires
NOTE Luminaires can be positioned or repositioned along the length of track in a simple manner (that is, without
the use of tools).
3.3
track* coupler
component enabling electrical or mechanical connection to be made between tracks, but
electrically only on the same sector opening (mains voltage or SELV)
3.4
track* supply connector
component used for the electrical connection of a supply to the track system, but always
operating on one sector opening only
NOTE 1 The function of a coupler and a track supply connector may be combined.
NOTE 2 For the SELV sector, the track supply connector may incorporate a SELV convertor or safety isolating
transformer supplied directly from the mains voltage sector.

3.5
luminaire supply connector
component for the electrical connection of a luminaire to the track. A connector does not
provide mechanical connection of a luminaire to the track
The electrical connection shall operate on one sector only (mains or SELV)

+AMD2:2019 CSV  IEC 2019
3.6
*
track adaptor
component used for the electrical and mechanical connection of a luminaire to the track, but
electrically and mechanically only on the same sector opening (mains voltage or SELV)
NOTE An adaptor may incorporate a switch or a fuse.

3.7
track* suspension device
component used for the mechanical connection of the track system to the supporting surface
3.8
luminaire suspension device
component used for the mechanical connection of a luminaire to the track
3.9
end cover
component intended to be fixed at the end of a track, providing electrical and mechanical
protection of the ends of the conductors
3.10
class I track
generally linear assembly of conductors and housing designed to be operated from a mains
voltage supply providing the electrical connection and in most instances mechanical support
of class I and class II luminaires only.
Note 1 to entry: The track can be provided with auxiliary circuits for control or audio signals. These auxiliary
circuits can use conductors originally designed for mains supply.
Note 2 to entry: The track system can be provided with circuits identified to ensure battery recharge (for self-
contained emergency luminaires).
3.11
class III track
generally linear assembly of conductors and housing designed to be operated from a SELV
supply providing the electrical connection and in most instances mechanical support of class
III luminaires only
NOTE A class III SELV supplied system or a SELV sector opening need not have insulation to protect against
contact with current-carrying parts, due to its inherently safe nature.
Note 1 to entry: The track can be provided with auxiliary circuits for a SELV control or audio signals. These
auxiliary circuits can use separate auxiliary conductors or conductors originally designed for a SELV supply.
3.12
mixed supply track system – classes I and III
combination of tracks according to 3.10 and 3.11
3.13
rated current
current assigned to the track or the component by the manufacturer
3.14
*
track sector opening
opening in the track enabling the electrical connection of the adaptor or the luminaire supply
connector to the track conductors
___________
* The word ‘track’ is occasionally not repeated in the text of the standard where these definitions are used.
* The word ‘track’ is occasionally not repeated in the following text where these definitions are used.

– 8 – IEC 60570:2003+AMD1:2017
+AMD2:2019 CSV  IEC 2019
4 Classification
Luminaire track systems shall be either class I, class III or a mixed supply track system with
class I and class III sectors in accordance with the provisions of section two of IEC 60598-1.
Track systems shall only be classified as ordinary.
Luminaire/adaptor assemblies that are inseparable can be class II in accordance with the
provisions of section two of IEC 60598-1 provided they contain no earthing facilities.
Separate adaptors shall not be classified as class II, but may be used with class II luminaires.
5 General test requirements
5.1 The requirements and tests of this standard shall not be applied to equipment already
subject to its own separate IEC standard.
5.2 Tests according to this standard are type tests.
One test sample as described in 5.3 shall be subjected to all relevant tests.
In order to reduce the time of testing and to allow for any tests which may be destructive, the
manufacturer may submit additional samples or parts of samples provided that these are of
the same materials as the original sample and that the results of the test are the same as if
carried out on a single sample.
5.3 Unless otherwise specified, the sample is tested as delivered and under the most
unfavourable conditions of use taking into account the manufacturer's instructions, at an
ambient temperature of between 10 °C and 30 °C.
The minimum test sample of a class I or a class III track shall include the following items a) to
i) as follows. For a mixed supply system the minimum sample quantities stated are required
for both class I and class III sectors:.
For track systems with control interface and/or additional circuits, it is necessary to provide
samples of the different constructions (both with and without additional circuits); the same is
applicable for tracks designed to be used together with emergency luminaires.
a) where a track system provides for interconnection between track lengths, at least 3 sections of
track comprising a total length when assembled together of not less than 2,4 m and
including 1 section of maximum length as indicated in the manufacturer's literature. Where
interconnection is not provided for, only 1 track section of maximum length is required;
b) 1 track supply connector;
c) 1 end cover (if required);
d) 1 coupler per length of track supplied (if applicable) (minimum of 3);
e) 1 adaptor per length of track supplied (minimum of 3);
f) 1 luminaire supply connector per length of track supplied (if applicable) (minimum of 3);
g) the necessary suspension devices and any other components as specified by the
manufacturer in his installation instructions;
h) a typical luminaire representing the most unfavourable combination from a testing point of
view for the purpose of the test of clause 11;
i) additionally with a class III test sample, one selection of track of each type of class I track
made by the same manufacturer.

+AMD2:2019 CSV  IEC 2019
NOTE Item i) is required for the tests of 8.1.1 when testing a class III track.
5.4 Unless otherwise specified, the tests are carried out in the order of the clauses.
6 Marking
The provisions of section three of IEC 60598-1 apply together with the requirements in 6.1
to 6.7 6.9.
6.1 The track shall be marked with rated current (A), rated voltage (V) and the graphical
symbol IEC 60417-5180 for class III equipment if appropriate.
A mixed supply system shall be marked with rated current (A), rated voltage (V) on the mains
voltage sector and on the SELV sector respectively. The SELV sector shall also be marked
with the graphical symbol IEC 60417-5180 for class III.
6.2 Adaptors need only be marked with their rated current, rated voltage, manufacturer's
name or trade mark and type reference and the graphical symbol IEC 60417-5180 for class III
equipment if appropriate.
Adaptors and luminaire supply connectors incorporated in luminaires do not require marking
additional to that of the luminaire.
If the adaptor has a fuse incorporated, the rated current and type of fuse shall be marked on
the body of the adaptor.
6.3 Couplers and connectors need only be marked with the manufacturer's name or trade
mark and type reference and the graphical symbol IEC 60417-5180 for class III equipment if
appropriate.
Luminaire supply connectors not incorporated in the luminaire shall, in addition, be marked
with rated current and rated voltage. All terminals shall be marked with their identification; the
mounting instructions shall explain the meaning of identification and the relevant circuit
connections and/or functions.
NOTE Some track and adaptor terminals can be identified with a dual function such as for supply or audio signal
connection.
6.4 Marking of the rated current and the rated voltage of the track system shall be easily
discernible during and after installation of the track system.
NOTE National wiring rules may require that adaptors do not have a lower maximum current rating than the track
system.
6.5 In addition to the above markings the following details, if they are necessary to ensure
proper use and maintenance, shall be given either on the luminaire track system or in the
manufacturer's instructions supplied with it:
a) details of the maximum mechanical loading for which each section of the track system and
luminaire suspension devices are suitable, inclusive of the weight of luminaires and
accessories. In addition, a warning that the mechanical loading shall be intended as the
complete loading of the whole system. If the track is intended to be wall mounted, or has
similar non-horizontal mounting, the instructions shall contain information regarding any
limitations of the track positioning, and the maximum specified mechanical loadings.
b) a warning if the components are unsuitable for the connection of inductive loads, or de-
rating for inductive loads if appropriate;

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c) the maximum permissible track temperature under normal operating conditions if different
from 70 °C;
d) a warning that it is the user's responsibility to ensure electrical, mechanical and thermal
compatibility between the track system and luminaires attached to it.
Mounting instructions supplied with the adaptor shall state the track system on which it may
be used and warnings shall be given that the use is limited to the track system specified.
6.6 In addition to the above markings and information, the following details shall be given in
the manufacturer's instructions supplied with class III and mixed supply track systems;
a) a warning that the class III system or sector opening should only be connected to a SELV
supply designed for operating class III equipment;
b) where there is an associated safety isolating transformer or lamp controlgear, adequate
instructions regarding the correct method of connection of the transformer or lamp
controlgear terminals to avoid misinterpretation of the primary and secondary terminals;
c) a warning that class III luminaire track systems/sectors openings and components are not
compatible with class I track systems and that class III luminaire connectors/adaptors
should not be used on other manufacturer's track systems;
d) instructions concerning suitable means for overload and short-circuit protection of the
SELV circuit;
NOTE The means of protection should meet the requirements of IEC 60364-7-715: Electrical installations of
buildings – Extra-low voltage lighting installations.
e) the minimum cross-sectional area and maximum length of the supply cable between
transformer and track supply connector;
f) a warning that for Class III track systems any connected control or audio signals shall only
be provided by a SELV source.
6.7 The instruction leaflet for class III track systems/sector openings shall contain the
following warning:
CAUTION: TO REDUCE THE RISK OF OVERHEATING AND FIRE
DO NOT BRIDGE CONDUCTORS
6.8 Marking for tracks using other circuits
In addition to the above markings and information, the following details shall be given in the
manufacturer's instructions supplied with tracks using control signals via conductors originally
designed for mains supply:
• Instructions for the safe connection of control signal conductors if any misconnection could
inadvertently reduce the required electrical insulation between circuits.
6.9 Marking for track suitable for supplying emergency luminaires
In addition to the above markings and information, the following details shall be given in the
manufacturer’s instructions:
• for track systems designed to operate centrally supplied emergency luminaires: a warning
that the track and components shall be connected to a system designed to supply
emergency luminaires, to ensure the correct operating of emergency luminaires on the
whole system;
• for track systems used to supply a self-contained emergency luminaire: information that
the supply line for battery recharging shall be un-switched.

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7 General requirements and ratings
Track systems shall be so designed and constructed that in normal use they function safely
and minimize the risk of danger to persons and surroundings.
In general, compliance is checked by carrying out all tests specified.
The rated voltage between poles for a class I track system shall not exceed 440 V and for a
class III system the rated voltage shall not exceed 25 V SELV voltage limits as specified in
IEC 60598-1. The current rating for a class I track system shall be maximum 16 A and for a
class III system it shall be maximum 25 A. For a combined system the rated current of each
sector opening shall not exceed the values given for a class I or a class III system
respectively.
Compliance is checked by inspection.
8 Construction
The provisions of section four of IEC 60598-1 apply together with the requirements in 8.1
to 8.12 8.13 with the exception of 4.11.6 which is replaced by 8.9.
Annex A provides details regarding the test to be carried out on luminaires supplied by track
systems using control signals via conductors designed for supply voltage.
Compliance shall be checked by carrying out the tests in Annex A as applicable.
8.1 Components for class I tracks shall be so designed that there is no risk of accidental
contact between the earthing contact of the component and the current-carrying parts of the
track during insertion and removal by the user.
This requirement does not apply during installation of the track system.
8.1.1 Adaptors, couplers and supply connectors shall be so constructed that electrical
connection with systems/sectors openings of other classes of tracks made by the same
manufacturer is effectively prevented.
8.2 Class I adaptors shall incorporate provision for mechanical connection to the track such
that the weight of the adaptor and/or luminaire is not supported by the electrical connections
of the adaptor and track.
The requirements of 16.3 shall also apply.
Class III adaptors shall incorporate provision for mechanical connection to the track such that
the weight of the adaptor and/or luminaire cannot impair electrical connection and safety.
8.2.1 When fuses are incorporated in adaptors they shall be of the high-breaking capacity type.
8.3 Contacts of adaptors shall not be removable without dismantling the adaptor. Also, it
shall not be possible to replace the earthing pins or contacts in an incorrect position and this
provision shall also apply to neutral pins or contacts where this is a safety requirement of the
method of construction of the system.
Where luminaires meet the requirements of class II and are provided with an integral adaptor
for connection to track systems, the adaptor may incorporate an earthing contact provided

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that, when connected to the track, the requirements of class II for the luminaire are
maintained.
Compliance is checked by inspection and by the electric strength test of 15.1.
8.4 Couplers, track supply connectors and end covers shall be capable of being
mechanically locked to the track. Couplers, connectors and adaptors shall ensure reliable
electrical connection.
Compliance with the requirements in 8.1 to 8.4 is checked by inspection, manual test and
where appropriate by the test in 12.1.
Compliance of 8.1.1 is checked by attempting to insert the adaptors, couplers and connectors
into the different samples of the track system/sector openings. There shall be no electrical
connection made.
8.5 Adjacent lengths of track shall be mechanically locked together in one of the following
ways:
a) with the aid of couplers;
b) by other separate means using the couplers only to align the tracks;
c) by rigidly fixing the length of track directly to the supporting surface in which case the
electrical contact shall be reliable when the ends of the track sections are separated
longitudinally by 1 mm and when they are separated by 1 mm at right angles to the
supporting surface.
NOTE A spacing at right angles to the supporting surface is specified in order to take account of unevenness of
the surface.
Compliance is checked by carrying out the tests with the track in this position.
8.6 Mechanical suspensions shall have adequate factors of safety. The tests in 4.14.1 of
IEC 60598-1 shall be replaced by the following tests for luminaire track system suspensions.
Compliance is checked by the following tests:
To test the suspension of both track and luminaires, suspension devices for luminaires,
including adaptors, are mounted on the track as in normal use specified by the track
manufacturer and are subjected for 1 h to a load equal to 5 times the specified load as
claimed by the manufacturer, with a minimum value of 50 N. The minimum claimed load value
for adaptor and for suspension devices for luminaires shall be:
− 50 N for class I and class II;
− 10 N for class III;
− the weight of the luminaire for adaptors which are integrated in the luminaire.
NOTE The adaptors according to the third bullet are intended for use by luminaire manufacturers only and are not
for retail sale.
This test shall be made at a temperature of t of the track +15 °C.
a
After the test, the components, the track and its fixing devices shall not be deformed to such
an extent as that safety would be impaired safety and the components shall not have become
detached from the track.
For the purpose of the following bending test, which is an additional test of luminaire
suspension devices, the track is mounted on a horizontal surface.

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The test shall be made at a temperature of t of the track +15 °C.
a
A bending moment of 2,5 Nm is then applied to the luminaire suspension/fixing device, the
force being applied for 1 min in a direction parallel to the track axis and for 1 min in a
direction perpendicular to this axis.
After the test, the luminaire suspension/fixing device and other parts of the track system shall
not be deformed to such an extent as that safety would be impaired safety and the
suspension device shall not have become loose.
NOTE Additional tests may be required for track systems designed for use in low-temperature areas.
8.7 Tracks shall have adequate mechanical robustness.
Compliance is checked by the following test:
A force of 30 N is applied to metal parts enclosing live parts by means of a test finger
according to Figure 6 of IEC 61032. During the test, the clearance distance between metal
parts and live parts shall be not less than the values given in clause 9.
8.8 Polarity
Where necessary for the correct operation of the system, means shall be provided throughout
to ensure that the correct polarity is maintained.
Compliance is checked by inspection.
8.9 Mechanical/electrical endurance
Components shall withstand, without excessive wear and other harmful effects, the
mechanical, electrical and thermal stresses occurring in normal use.
For adaptors and luminaire supply connectors, compliance is checked by the following tests in
which "an operation" is either the insertion or withdrawal of an adaptor or the making or
breaking of an electrical contact at a speed which corresponds to practical usage.
a) The mechanical support system is checked by 100 operations.
b) Electrical contacts which operate simultaneously with the mechanical fixing devices are
checked by 100 operations in the same position on the track.
c) Electrical contacts which are operated independently from the mechanical fixing devices
are checked by 1 000 operations. After each 100 operations the contacts shall be moved
to a fresh position on the track. This test is applicable only to adaptors.
d) Where the luminaire supply connector or adaptor for a class III track system/sector is
designed to be positioned along the axis of the track without being removed, it shall be
subject to 150 cycles of operation as described in 4.14.3 of IEC 60598-1.
The tests of items b) and c) are made with a.c. at rated voltage and the test current shall be
1,25 times the rated current of the component. The power factor of the load shall be
approximately 0,6 unless a different current rating is marked for resistor loads which are then
tested with a.c. in a non-inductive circuit. For class III systems, the power factor is taken as 1,0.
NOTE In the case of a dual rating (see item b) of 6.5), the more onerous condition should be applied.
If an air core inductor is used for the 0,6 power factor load, a resistor taking approximately 1
% of the current through the inductor is connected in parallel with it. Iron core inductors may
be used, provided the current is of substantially sinusoidal waveform. No current is passed
through the earthing circuit.
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After the test, the samples shall withstand an electric strength test made in accordance with
10.2 of IEC 60598-1, the test voltage however, being reduced to 1 500 V for components
operating at mains supply voltage and to 500 V for components operating at SELV.
The samples shall show:
a) no wear impairing their further use;
b) no deterioration of enclosures or barriers;
c) no loosening of electrical or mechanical connections.
Before and after the tests of this clause, the adaptor shall be mounted on the track and the
contacts loaded with 1,5 times the rated current of the adaptor. The voltage drop across each
contact, including the earth contact, shall not exceed 50 mV.
8.10 Short-circuit protection
8.10.1 For class I system/sector openings it shall not be possible to bridge track conductors
with the test probe D, according to IEC 60598-1.
Compliance is checked by the test of 9.2.0 of IEC 60598-1, using the test probe D application
force shown in Table 9.1.
8.10.2 The SELV class III track system/sector opening shall incorporate means to prevent
accidental short circuits between current-carrying parts of different polarity in the output
circuit.
Adequate means shall be provided to prevent impairing of safety due to unintended short-
circuiting of uninsulated accessible SELV conductors of opposite polarity by the test chain
described in 4.26.3 of IEC 60598-1.
NOTE 1 Class III luminaires supplied from a separate unspecified SELV supply should have at least one
conductor insulated. Where insulation is not provided, the luminaire manufacturer should declare the maximum VA
output of the SELV source and the test should be conducted at this value.
NOTE 2 If the test chain cannot be hung on the track by itself, the test sample is deemed to comply with the test
requirement.
Compliance is checked by the test of 4.26.2 of IEC 60598-1.
8.11 Interchangeability
8.11.1 Care shall be taken in the design and manufacture of adaptors for use with a
particular track system to ensure interchangeability and safety in use. In particular, no
connections between live conductors and earth conductors shall be possible.
Tests shall be conducted with approved track samples retained by the test house or samples
of the approved track provided by the manufacturer.
The minimum insulation between supply circuits (LV, SELV) and the housing and
control/signal interface shall be at least those specified in IEC 60598-1.
SELV circuits shall not use conductors designed for mains supply; this restriction also applies
to control signal and audio circuits which may be provided from a SELV source.
SELV circuits shall comply with the requirements for Class III track.

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Track conductors designed for the supply connection to luminaires may be used for other than
SELV control signal purposes if the insulation for those conductors meets the requirements
for relevant mains supply voltages.
It shall not be possible to reduce the minimum creepage distances and clearances between
different circuits, as specified in IEC 60598-1, neither along the track, nor inside the
components. This requirement shall be ensured even in the cas
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