IEC 61316:2021

IEC 61316 ®
Edition 3.0 2021-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial cable reels
Enrouleurs de câble industriels
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IEC 61316 ®
Edition 3.0 2021-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial cable reels
Enrouleurs de câble industriels

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.060.01; 29.120.99 ISBN 978-2-8322-9922-7

– 2 – IEC 61316:2021 © IEC 2021
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 General requirements . 13
5 Standard ratings . 13
6 Classification . 14
7 Marking . 14
8 Dimensions. 16
9 Protection against electric shock . 16
10 Provisions for earthing . 19
10.1 Accessible metal parts . 19
10.2 Corrosion resistance of earth terminal . 19
10.3 Corrosion resistance of screws and nuts . 19
10.4 Earth connections . 19
10.5 Internal earthing circuit . 20
10.6 Internal moveable earth connection and slip rings . 20
11 Terminals and terminations . 21
11.1 Common requirements for terminals and terminations . 21
11.2 Screw type terminals . 23
11.3 Screwless type terminals . 25
11.4 Insulation piercing terminals (IPT) . 29
11.5 Mechanical tests on terminals . 30
11.6 Voltage drop test for screwless type terminals and for insulation piercing
terminals . 32
11.7 Tests for insulation piercing terminals transmitting contact pressure via
insulating parts . 34
11.7.1 Temperature-cycling test . 34
11.7.2 Short-time withstand current test . 34
12 Resistance to ageing of rubber and thermoplastic material . 34
13 Construction . 35
14 Degrees of protection . 37
15 Insulation resistance and dielectric strength . 38
16 Normal operation . 39
17 Temperature rise . 40
17.1 Temperature rise in normal use. 40
17.2 Temperature rise under overload conditions. 42
18 Flexible cables and their connection . 43
19 Mechanical strength . 46
20 Screws, current-carrying parts and connections . 47
21 Creepage distances, clearances and distances through sealing compound . 50
22 Resistance to heat, to fire and to tracking . 52
23 Corrosion and resistance to rusting . 53
24 Electromagnetic compatibility . 54

24.1 Immunity . 54
24.2 Emission . 54
Bibliography . 55

Figure 1 – Pillar terminals . 10
Figure 2 – Screw terminals . 10
Figure 3 – Stud terminals . 10
Figure 4 – Saddle terminals . 11
Figure 5 – Lug terminals . 11
Figure 6 – Mantle terminals. 11
Figure 7 – Screwless terminals . 12
Figure 8 – Insulation piercing terminals . 12
Figure 9 – Test piston . 16
Figure 10 – Standard 1 mm gauge . 18
Figure 11 – Gauges for testing insertability of round unprepared conductors . 24
Figure 12 – Information for the bending test . 27
Figure 13 – Test arrangement for terminals. 31

Table 1 – Preferred rated currents . 13
Table 2 – Deflection test forces. 28
Table 3 – Pulling test values on terminals . 31
Table 4 – Pulling force . 32
Table 5 – Test current . 34
Table 6 – Test voltage for dielectric strength test . 39
Table 7 – Permissible temperature rise . 41
Table 8 – Minimum cable sizes . 44
Table 9 – Maximum length of cable . 44
Table 10 – Gland tightening force . 47
Table 11 – Tightening torques. 48
Table 12 – Creepage distances, clearances and distances through sealing compound . 50

– 4 – IEC 61316:2021 © IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL CABLE REELS
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.
International Standard IEC 61316 has been prepared by subcommittee 23H: Plugs, socket-
outlets and couplers for industrial and similar applications, and for electric vehicles, of IEC
technical committee 23: Electrical accessories.
This third edition cancels and replaces the second edition, published in 1999. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
– Implementation of the latest tests and requirements previously included in IEC 60309-1.

The text of this International Standard is based on the following documents:
FDIS Report on voting
23H/483/FDIS 23H/489/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement,
available at www.iec.ch/members_experts/refdocs. The main document types developed by
IEC are described in greater detail at www.iec.ch/standardsdev/publications.
In this document, 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 this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
– 6 – IEC 61316:2021 © IEC 2021
INDUSTRIAL CABLE REELS
1 Scope
This document applies to cable reels provided with a non-detachable flexible cable with a
rated operating voltage not exceeding 690 V DC and/or 690 V AC with a frequency not
exceeding 500 Hz and a rated current not exceeding 63 A, primarily intended for industrial
use, either indoors or outdoors, for use with accessories complying with IEC 60309-1,
IEC 60309-2 or IEC 60309-4.
This document applies to:
– portable cable reels equipped with one plug or appliance-inlet complying with IEC 60309-1
or IEC 60309-2 and at least one socket-outlet complying with IEC 60309-1, IEC 60309-2
or IEC 60309-4;
– fixed cable reels equipped with at least one socket-outlet complying with IEC 60309-1,
IEC 60309-2 or IEC 60309-4;
– cable reels suitable for use at ambient temperature normally within the range of −25 °C
to +40 °C.
The use of this equipment on construction sites and for agricultural, commercial and domestic
appliances is not precluded.
This document also applies to cable reels intended to be used in extra-low voltage
installations.
In locations where special conditions prevail, for example, on board ships, in vehicles and the
like, or where explosions are liable to occur, additional requirements can be necessary.
NOTE 1 This document was not developed for Electric Vehicle (EV) application, but it can be used as guide for
cable reels for EV application
NOTE 2 Additional requirements for cable reels for currents higher than 63 A are under consideration.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements 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 60068-2-75, Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests
IEC 60068-2-78, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat, steady
state
IEC 60112, Method for the determination of the proof and the comparative tracking indices of
solid insulating materials
IEC 60245 (all parts), Rubber insulated cables – Rated voltages up to and including
450/750 V
IEC 60245-4, Rubber insulated cables – Rated voltages up to and including 450/750 V –
Part 4: Cords and flexible cables

IEC 60309-1:2021, Plugs, fixed or portable socket-outlets and appliance inlets for industrial
purposes – Part 1: General requirements
IEC 60309-2, Plugs, fixed or portable socket-outlets and appliance inlets for industrial
purposes – Part 2: Dimensional compatibility requirements for pin and contact-tube
accessories
IEC 60309-4, Plugs, fixed or portable socket-outlets and appliance inlets for industrial
purposes – Part 4: Switched socket-outlets with or without interlock
IEC 60529, Degrees of protection provided by enclosures (IP Code)
IEC 60664-1:2020, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests
IEC 60664-3, Insulation coordination for equipment within low-voltage systems – Part 3: Use
of coating, potting or moulding for protection against pollution
IEC 60695-2-11, Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods –
Glow-wire flammability test method for end-products (GWEPT)
IEC 60695-10-2, Fire hazard testing – Part 10-2: Abnormal heat – Ball pressure test method
IEC 60730-2-9, Automatic electrical controls – Part 2-9: Particular requirements for
temperature sensing control
IEC 61000-6-1, Electromagnetic compatibility (EMC) – Part 6-1: Generic standards –
Immunity standard for residential, commercial and light-industrial environments
IEC 61000-6-3, Electromagnetic compatibility (EMC) – Part 6-3: Generic standards –
Emission standard for equipment in residential environments
IEC 61032, Protection of persons and equipment by enclosures – Probes for verification
ISO 1456, Metallic and other inorganic coatings – Electrodeposited coatings of nickel, nickel
plus chromium, copper plus nickel and of copper plus nickel plus chromium
ISO 2081, Metallic and other inorganic coatings – Electroplated coatings of zinc with
supplementary treatments on iron or steel
ISO 2093, Electroplated coatings of tin – Specification and test methods
ISO/IEC Guide 51, Safety aspects – Guidelines for their inclusion in standards
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
NOTE Where the terms "voltage" and "current" are used, they imply the direct current (DC) or alternating current
(AC) root mean square (RMS) values.

– 8 – IEC 61316:2021 © IEC 2021
3.1
rated operating voltage
voltage assigned to the cable reel by the manufacturer
3.2
rated current
current assigned to the cable reel by the manufacturer
3.3
cable reel
device comprising a flexible cable attached to a reel, so constructed that the cable may be
wound on to the reel
Note 1 to entry: Plugs, socket-outlets and appliance inlets, if any, supplied with cable reels are considered as part
of the reel.
3.3.1
portable cable reel
cable reel which can be moved easily from one place to another
3.3.2
fixed cable reel
cable reel intended for mounting on a fixed support
3.4
non-detachable flexible cable
flexible cable which is fixed to a cable reel
3.5
rewireable cable reel
cable reel so constructed that the flexible cable can be replaced with the aid of a
general-purpose tool
3.6
non-rewireable cable reel
cable reel so constructed that it forms a complete unit with the flexible cable, the plug and the
socket-outlets fixed by the manufacturer of the cable reel in such a manner that, after
dismantling, the cable reel is rendered unfit for any further purpose
3.7
accessible part
part which can be touched by means of the standard test finger
3.8
detachable part
part which can be removed without the aid of a general-purpose tool
3.9
creepage distance
shortest path along the surface of an insulating material between two conductive parts
3.10
clearance
shortest distance in air between two conductive parts

3.11
thermal cut-out
temperature-sensing control device intended to switch off automatically under abnormal
operating conditions and which has no provision for adjustment by the user
3.12
current cut-out
current-sensing control device intended to switch off automatically under abnormal operating
conditions and which has no provision for adjustment by the user
3.13
trip-free mechanism
mechanism designed so that disconnection can neither be prevented nor inhibited by a reset
mechanism, and so that the contacts can neither be prevented from opening nor be
maintained closed against a continuation of excess temperature or current
3.14
non-self-resetting thermal or current cut-out
thermal or current cut-out which can only be reset by a manual action directly acting on the
device which is used exclusively for this purpose and which is mounted in the cable reel or for
fixed cable reel as a separate unit within sight of the cable reel
3.15
basic insulation
insulation of hazardous-live-parts which provides basic protection
[SOURCE: IEC 60050-195:1998, 195-06-06, modified – note to entry omitted.]
3.16
supplementary insulation
independent insulation applied in addition to the basic insulation, for fault protection
[SOURCE: IEC 60050-195:1998, 195-06-07]
3.17
double insulation
insulation comprising both basic insulation and supplementary insulation
[SOURCE: IEC 60050-195:1998, 195-06-08]
3.18
reinforced insulation
insulation of hazardous-live-parts which provides a degree of protection against electric shock
equivalent to double insulation
Note 1 to entry: Reinforced insulation may comprise several layers which cannot be tested singly as basic
insulation or supplementary insulation.
[SOURCE: IEC 60050-195:1998, 195-06-09]
3.19
termination
insulated or non-insulated connecting device for non-reusable connection of the conductors of
the supply cable
– 10 – IEC 61316:2021 © IEC 2021
3.20
terminal
conductive part of one pole, composed of one or more clamping unit(s) and insulation if
necessary
3.20.1
pillar terminal
terminal in which the conductor is inserted into a hole or cavity, where it is clamped under the
shank of the screw or screws
Note 1 to entry: The clamping pressure may be applied directly by the shank of the screw or through an
intermediate clamping member to which pressure is applied by the shank of the screw (see Figure 1).

Figure 1 – Pillar terminals
3.20.2
screw terminal
terminal in which the conductor is clamped under the head of the screw
Note 1 to entry: The clamping pressure may be applied directly by the head of the screw or through an
intermediate part, such as a washer, clamping plate or anti-spread device (see Figure 2).

Figure 2 – Screw terminals
3.20.3
stud terminal
terminal in which the conductor is clamped under a nut
Note 1 to entry: The clamping pressure may be applied directly by a suitably shaped nut or through an
intermediate part, such as a washer, clamping plate or anti-spread device (see Figure 3).

Figure 3 – Stud terminals
3.20.4
saddle terminal
terminal in which the conductor is clamped under a saddle by means of two or more screws or
nuts
Note 1 to entry: See Figure 4.

Figure 4 – Saddle terminals
3.20.5
lug terminal
screw terminal or a stud terminal, designed for clamping a cable lug or bar by means of a
screw or nut
Note 1 to entry: See Figure 5.

Figure 5 – Lug terminals
3.20.6
mantle terminal
terminal in which the conductor is clamped against the base of a slot in a threaded stud by
means of a nut
Note 1 to entry: The conductor is clamped against the base of the slot by a suitably shaped washer under the nut,
by a central peg if the nut is a cap nut, or by equally effective means for transmitting the pressure from the nut to
the conductor within the slot (see Figure 6).

Figure 6 – Mantle terminals
– 12 – IEC 61316:2021 © IEC 2021
3.20.7
screwless type terminal
terminal for the connection and subsequent disconnection of one or more conductors, the
connection being made, directly or indirectly, by means other than screws
Note 1 to entry: Examples of screwless type terminals are given in Figure 7.

Figure 7 – Screwless terminals
3.20.8
insulation piercing terminal
IPT
terminal for the connection and subsequent disconnection of one or more conductors, the
connection being made by piercing, boring through, cutting through, displacing or making
ineffective in some other manner the insulation of the conductor(s) without previous stripping
Note 1 to entry: The removal of the outer sheath of the cable, if necessary, is not considered as a previous
stripping.
Note 2 to entry: Examples of IPT are given in Figure 8.

Key
A Conductor
Figure 8 – Insulation piercing terminals

3.21
clamping unit
part(s) of the terminal necessary for mechanical clamping and electrical connection of the
conductor(s), including the parts which are necessary to ensure the correct contact pressure
3.22
connecting device
device for the electrical connection of one (or more) conductor(s), either fixed to a base or
forming an integral part of the equipment
4 General requirements
4.1 Industrial cable reels shall be so designed and constructed that, in normal use, their
performance is reliable, and safety is achieved by reducing risk to a tolerable level, as defined
in ISO/IEC Guide 51.
Unless otherwise stated, the normal use environment in which the cable reels complying with
this document are normally used is pollution degree 3 according to IEC 60664-1.
If other pollution degrees are needed, creepage distances and clearances shall be in
accordance with IEC 60664-1. The comparative tracking index (CTI) value shall be evaluated
in accordance with IEC 60112. Test and requirements are specified in 21.3.
Cable reels shall have a minimum degree of protection IP24D (see 6.3) according to
IEC 60529.
In general, compliance is checked by carrying out all the tests specified.
4.2 Unless otherwise stated, one sample is submitted to all the tests, and the requirements
are satisfied if all the tests are met. The sample is tested as delivered and under normal
conditions of use, at an ambient temperature of (20 ± 5) °C. Tests are carried out in the order
of the clauses of this document.
4.3 If the sample does not satisfy a test due to an assembly or manufacturing fault which is
not representative of the design, that test and any preceding one which may have influenced
the results of the test shall be repeated in the required sequence. Tests which follow shall be
made on another sample, which shall comply with the requirements of this document.
5 Standard ratings
The rated current shall not be higher than the maximum rated current of the plug or the
appliance inlet or the socket-outlet.
Preferred rated currents are given in Table 1.
Table 1 – Preferred rated currents
Series I Series II
A A
16 20
32 30
63 60
NOTE 1 "Preferred ratings" do not exclude other ratings.

– 14 – IEC 61316:2021 © IEC 2021
NOTE 2 This table does not provide correspondence between series I and series II values.
Compliance is checked by inspection of the marking.
6 Classification
6.1 Cable reels are classified according to the type of construction:
– portable cable reels;
– fixed cable reels.
6.2 Cable reels are classified according to the method of winding the flexible cable:
– hand-operated cable reels;
– spring-operated cable reels;
– motor-driven cable reels.
6.3 Cable reels are classified according to the degree of protection according to IEC 60529:
– the minimum degree of protection shall be IP24D.
6.4 Cable reels are classified according to their protection against excessive temperatures:
– cable reels incorporating thermal cut-out;
– cable reels incorporating current cut-out;
– cable reels incorporating both thermal and current cut-outs.
6.5 Cable reels are classified according to the method of connecting the cable:
– rewireable cable reels;
– non-rewireable cable reels.
6.6 Cable reels are classified according to the material of the drum:
– cable reels with drum made of insulating material;
– cable reels with drum made of other material.
6.7 Cable reels are classified according to the type of conductors for screwless type and
insulation piercing terminals, if any:
– for solid conductors only;
– for rigid (both solid and stranded) conductors only;
– for flexible conductors only;
– for rigid (both solid and stranded) and flexible conductors;
7 Marking
7.1 Cable reels shall be marked with:
– rated current(s) in amperes;
– rated operating voltage(s) or voltage range(s) in volts;
– symbol for the nature of supply;
– either the name or trademark of the manufacturer, or of the responsible vendor;
– type reference, which may be a catalogue number;
– degree of protection according to IEC 60529;

– maximum load which may be connected to the cable reel in fully reeled and fully
unreeled condition.
EXAMPLE: 1 000 W 400 V fully reeled cable

3 500 W 400 V fully extended cable

7.2 When symbols are used, they shall be as follows:
A amperes
V volts
Hz hertz
W watts
alternating current IEC 60417-5032 (2002-10)

direct current IEC 60417-5031 (2002-10)
protective earth IEC 60417-5019 (2006-08)

IPXXD* degree of protection
fully reeled cable reel
fully extended cable reel
* For IP codes, the two characteristic numerals (XX) shall be specified. The
supplementary letter D shall not be marked if the first characteristic
numeral is a 4 or greater.
For the marking of rated current(s) and rated operating voltage(s) or voltage range(s), figures
may be used alone. The figure for DC rated operating voltage, if any, shall then be placed
before the figure for the AC rated operating voltage and separated from it by a line or a dash.
Compliance is checked by inspection.
7.3 Cable reels shall be marked with an instruction clearly stating how to reset the thermal
and/or current cut-out device(s).
Compliance is checked by inspection.
7.4 If marking plates or labels are used, they shall be reliably secured. After all the tests of
this document, marking shall be easily legible with normal or corrected vision, without
additional magnification, and labels shall show no curling or loosening at the corners or edges.
Compliance is checked by inspection.
7.5 Marking shall be easily legible.
Compliance is checked by inspection, using normal or corrected vision, without additional
magnification.
Marking shall be durable and indelible.
Compliance is checked by the following test to be performed after the humidity treatment of
Clause 14.
Laser marking directly on the product and marking made by molding, pressing or engraving
are considered to be durable and indelible and they are not subjected to this test.

– 16 – IEC 61316:2021 © IEC 2021
The test is made by rubbing the marking for 15 s with a piece of cotton cloth soaked with
water and again for 15 s with a piece of cotton cloth soaked with n-hexane 95 % (Chemical
Abstracts Service Registry Number, CAS RN, 110-54-3).
NOTE n-hexane 95 % (Chemical Abstracts Service Registry Number, CAS RN, 110-54-3) is available from a
variety of chemical suppliers as a high-pressure liquid chromatography (HPLC) solvent.
When using the liquid specified for the test, precautions as stated in the relative material
safety datasheet provided by the chemical supplier shall be taken to safeguard the laboratory
technicians.
The marking surface to be tested shall be dried after the test with water.
Rubbing shall commence immediately after soaking the piece of cotton, applying a
compression force of (5 ± 1) N at a rate of about one cycle per second (a cycle comprising
forward and backward movement along the length of the marking). For markings longer than
20 mm, rubbing can be limited to a part of the marking, over a path of at least 20 mm length.
The compression force is applied by means of a test piston which is wrapped with cotton
comprising cotton wool covered by a piece of cotton medical gauze.
The test piston shall have the dimensions specified in Figure 9 and shall be made of an
elastic material which is inert against the test liquids and has a Shore-A hardness of 47 ± 5
(for example synthetic rubber).
When it is not possible to carry out the test on the specimens due to the shape/size of the
product, a suitable piece having the same characteristics as the product can be submitted to
the test.
+2 +1
A B ± 0,5 C
0 0
20 mm 20 mm 2 mm
Figure 9 – Test piston
8 Dimensions
The surface on which the cable is wound shall be at least eight times the maximum diameter
of the cable as given in IEC 60245-4, as appropriate.
For cable reels using flat cable, the surface on which the cable is wound shall have a
diameter of at least 10 times the average of the upper and lower dimensions of the cable.
9 Protection against electric shock
9.1 Cable reels shall be designed so that live parts are not accessible when the cable reel
is in normal use and when parts which can be removed without the aid of a tool, have been
removed.
Compliance is checked by inspection and, if necessary, by the tests of 9.2 and 9.3.
These tests shall be made immediately after the cable reel has passed a current having a
value corresponding to the maximum load, when fully reeled, for 1 h at an ambient
temperature of (20 ± 5) °C.
9.2 The standard test finger according to IEC 61032 Probe B is applied with a force of
(10 ± 1) N in every possible position; an electrical indicator with a voltage not less than 40 V
and not more than 50 V is used to show contact with the relevant part.
For cable reels, where the use of elastomeric or thermoplastic material is likely to
influence compliance with the requirement, the test is repeated but at an ambient temperature
of (35 ± 2) °C, the cable reels being at this temperature.
During this additional test, the parts of elastomeric or thermoplastic material of the cable reel
are subjected for 1 min to a force of 75 N, applied through the tip of a straight unjointed test
finger of the same dimensions as the standard test finger. This finger, with an electrical
indicator as described above, is applied to all places where yielding of the insulating material
could impair the safety of the cable reel.
During this test, the cable reel shall not deform to such an extent that those dimensions which
ensure safety are unduly altered and no live part shall be accessible.
9.3 The test is made with a straight rigid steel wire of (1 ± 0,015) mm as shown in
+0,1
(1 )
Figure 10, applied with a force of N. The end of the wire shall be free from burrs and
be at right angles to its length.
This test does not apply to the plug, appliance inlet and socket-outlets, if any, fitted to the
cable reel.
The test wire is provided with an electrical indicator, with a voltage not less than 40 V and not
more than 50 V, to show contact with relevant part.
The protection is satisfactory if the wire cannot enter the enclosure, or if it enters, it does not
touch live parts inside the enclosure.

– 18 – IEC 61316:2021 © IEC 2021
Dimensions in millimetres
Key
A Rigid steel wire
To calibrate the gauge, a push force of 1 N is applied on the steel rigid wire in the direction of its axis: the
characteristics of the gauge's internal spring shall be such that the suface A-A' is brought practically to the same
level as the surface B-B' when this force is applied.
Figure 10 – Standard 1 mm gauge
9.4 Parts providing protection against electric shock shall have adequate mechanical
strength and shall be reliably secured by means of screws or in a similar reliable manner so
that they will not work loose in normal use.
Compliance is checked by inspection and by the tests of Clause 19 and Clause 20.

10 Provisions for earthing
10.1 Accessible metal parts
For rewireable cable reels having accessible metal parts insulated from live parts by basic
insulation only:
– the earthing terminal shall comply with the requirements of Clause 11;
– the earthing terminal shall be located in proximity to the terminals for current-carrying
conductors;
– internal connections between the earthing terminal and accessible metal parts shall be
independent of the connection of the flexible cable in order to prevent loosening of internal
connections during the replacement of the flexible cable;
– when terminals of live conductors are accessible, no additional dismantling shall
be necessary to reach the earthing terminal. Moreover, the earthing terminal shall not be
more than 50 mm distance from the other terminals.
10.2 Corrosion resistance of earth terminal
All parts of the earthing terminal shall be such that there is no risk of corrosion resulting from
contact between these parts and the copper of the earthing conductor, or any other metal that
is in contact with these parts.
The body of the earthing terminal shall be of brass or other metal no less resistant to
corrosion, unless it is a part of the metal frame or enclosure, when the screw or nut shall be of
brass or plated steel complying with Clause 23, or other metal no less resistant to corrosion.
10.3 Corrosion resistance of screws and nuts
Screws and nuts of plated steel withstanding the test of Clause 20 are considered to be of a
metal no less resistant to corrosi
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