Plugs, socket-outlets and couplers with arcuate contacts

IEC 62986:2017(E) sets the general and dimensional interchangeability requirements for plugs, socket-outlets, connectors and appliance inlets with arcuate contacts of standardized configurations (hereinafter referred to as accessories), with a rated operating voltage not exceeding 600 V AC at a frequency of 50 Hz and 60 Hz and with rated currents of 20 A and 30 A, primarily intended for commercial use indoors, in conditions where the presence of water is negligible.

General Information

Status
Published
Publication Date
27-Sep-2017
Current Stage
PPUB - Publication issued
Start Date
28-Sep-2017
Completion Date
28-Sep-2017
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IEC 62986:2017 - Plugs, socket-outlets and couplers with arcuate contacts
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IEC 62986
Edition 1.0 2017-09
INTERNATIONAL
STANDARD
Plugs, socket-outlets and couplers with arcuate contacts
IEC 62986:2017-09(en)
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IEC 62986
Edition 1.0 2017-09
INTERNATIONAL
STANDARD
Plugs, socket-outlets and couplers with arcuate contacts
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.120.20 ISBN 978-2-8322-4870-6

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 3 ----------------------
– 2 – IEC 62986:2017 © IEC 2017
CONTENTS

FOREWORD ........................................................................................................................... 6

INTRODUCTION ..................................................................................................................... 8

1 Scope .............................................................................................................................. 9

2 Normative references ...................................................................................................... 9

3 Terms and definitions .................................................................................................... 10

4 General ......................................................................................................................... 16

4.1 General requirements ........................................................................................... 16

4.2 General notes on tests .......................................................................................... 16

5 Standard ratings ............................................................................................................ 17

6 Classification ................................................................................................................. 18

6.1 According to purpose ............................................................................................ 18

6.2 According to the method of connecting the cable .................................................. 18

7 Marking ......................................................................................................................... 18

8 Dimensions.................................................................................................................... 20

9 Protection against electric shock ................................................................................... 21

10 Provisions for earthing ................................................................................................... 21

11 Terminals and terminations ............................................................................................ 22

11.1 Common requirements for terminals and terminations ........................................... 22

11.2 Screw type terminals ............................................................................................. 24

11.3 Mechanical tests on terminals ............................................................................... 26

12 Resistance to ageing of rubber and thermoplastic material ............................................ 28

13 General construction ..................................................................................................... 29

14 Construction of socket-outlets ....................................................................................... 29

15 Construction of plugs and connectors ............................................................................ 30

16 Construction of appliance inlets ..................................................................................... 31

17 Degrees of protection .................................................................................................... 31

18 Insulation resistance and dielectric strength .................................................................. 32

19 Breaking capacity .......................................................................................................... 33

20 Normal operation ........................................................................................................... 36

21 Temperature rise ........................................................................................................... 37

22 Flexible cables and their connection .............................................................................. 38

22.1 Cable anchorages ................................................................................................. 38

22.2 Requirements for plugs and connectors ................................................................ 38

22.2.1 Non-rewirable plugs and connectors .............................................................. 38

22.2.2 Rewirable plugs and connectors .................................................................... 38

22.3 Pull test ................................................................................................................ 39

23 Mechanical strength ...................................................................................................... 41

23.1 General ................................................................................................................. 41

23.2 Impact test apparatus ........................................................................................... 42

23.3 Normal use ........................................................................................................... 42

23.4 Test description .................................................................................................... 43

23.5 Socket-outlets and appliance inlets ....................................................................... 44

23.6 Rewirable plugs and connectors ........................................................................... 44

23.7 Non-rewirable plugs and connectors ..................................................................... 45

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IEC 62986:2017 © IEC 2017 – 3 –

23.8 Accessories with screwed glands .......................................................................... 46

23.9 Plugs .................................................................................................................... 46

23.9.1 General ......................................................................................................... 46

23.9.2 Perpendicular stress test ............................................................................... 47

23.9.3 Axial stress test ............................................................................................. 47

23.9.4 Tensile strength test ...................................................................................... 48

23.9.5 Blade retention (compression) test ................................................................ 48

24 Screws, current-carrying parts and connections ............................................................. 48

25 Creepage distances, clearances and distances through sealing compound .................... 50

26 Resistance to heat ......................................................................................................... 51

27 Resistance to fire and to tracking................................................................................... 52

28 Corrosion and resistance to rusting ............................................................................... 54

29 Conditional short-circuit current withstand test ............................................................... 55

29.1 Short-circuit current .............................................................................................. 55

29.2 Ratings and test conditions ................................................................................... 55

29.3 Test circuit ............................................................................................................ 55

29.4 Calibration ............................................................................................................ 58

29.5 Test procedure ...................................................................................................... 58

29.6 Behaviour of the equipment under test .................................................................. 58

29.7 Acceptance conditions .......................................................................................... 59

30 Electromagnetic compatibility ........................................................................................ 59

30.1 Immunity ............................................................................................................... 59

30.2 Emission ............................................................................................................... 59

STANDARD SHEETS ............................................................................................................ 60

STANDARD SHEET L5-20 125 V, 20 A, two-pole three-wire ................................................. 62

STANDARD SHEET L5-30 125 V, 30 A, two-pole three-wire ................................................. 63

STANDARD SHEET L25-30 240 V, 30 A, two-pole three-wire ............................................... 64

STANDARD SHEET L6-20 250 V, 20 A, two-pole three-wire ................................................. 65

STANDARD SHEET L6-30 250 V, 30 A, two-pole three-wire ................................................. 66

STANDARD SHEET L7-20 277 V, 20 A, two-pole three-wire ................................................. 67

STANDARD SHEET L7-30 277 V, 30 A, two-pole three-wire ................................................. 68

STANDARD SHEET L24-20 347 V, 20 A, two-pole three-wire ............................................... 69

STANDARD SHEET L8-20 480 V, 20 A, two-pole three-wire ................................................. 70

STANDARD SHEET L8-30 480 V, 30 A, two-pole three-wire ................................................. 71

STANDARD SHEET L9-20 600 V, 20 A, two-pole three-wire ................................................. 72

STANDARD SHEET L9-30 600 V, 30 A, two-pole three-wire ................................................. 73

STANDARD SHEET L14-20 125/250 V, 20 A, three-pole four-wire ........................................ 74

STANDARD SHEET L14-30 125/250 V, 30 A, three-pole four-wire ........................................ 75

STANDARD SHEET L15-20 250 V, 20 A, three-pole four-wire .............................................. 76

STANDARD SHEET L15-30 250 V, 30 A, three-pole four-wire .............................................. 77

STANDARD SHEET L16-20 480 V, 20 A, three-pole four-wire .............................................. 78

STANDARD SHEET L16-30 480 V, 30 A, three-pole four-wire .............................................. 79

STANDARD SHEET L17-30 600 V, 30 A, three-pole four-wire .............................................. 80

STANDARD SHEET L21-20 120/208 V, 20 A, four-pole five-wire .......................................... 81

STANDARD SHEET L21-30 120/208 V, 30 A, four-pole five-wire .......................................... 82

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– 4 – IEC 62986:2017 © IEC 2017

STANDARD SHEET L26-30 240/415 V, 30 A, four-pole five-wire .......................................... 83

STANDARD SHEET L22-20 277/480 V, 20 A, four-pole five-wire .......................................... 84

STANDARD SHEET L22-30 277/480 V, 30 A, four-pole five-wire .......................................... 85

STANDARD SHEET L23-20 347/600 V, 20 A, four-pole five-wire .......................................... 86

STANDARD SHEET L23-30 347/600 V, 30 A, four-pole five-wire .......................................... 87

Bibliography .......................................................................................................................... 88

Figure 1 – Diagram showing the uses of the accessories ...................................................... 11

Figure 2 – Pillar terminals ..................................................................................................... 14

Figure 3 – Screw terminals ................................................................................................... 14

Figure 4 – Stud terminals ...................................................................................................... 14

Figure 5 – Saddle terminals .................................................................................................. 15

Figure 6 – Mantle terminals................................................................................................... 15

Figure 7 – Gauges for testing insertability of round unprepared conductors having the

maximum specified cross-section .......................................................................................... 25

Figure 8 – Flexing test arrangement ...................................................................................... 27

Figure 9 – Circuit diagrams for breaking capacity and normal operation tests ....................... 35

Figure 10 – Apparatus for testing the cable anchorage ......................................................... 40

Figure 11 – Impact test apparatus – Pendulum assembly ...................................................... 43

Figure 12 – Arrangement for mechanical strength test for plugs and connectors ................... 45

Figure 13 – Apparatus for flexing test ................................................................................... 46

Figure 14 – Arrangement for contact blade strength tests for plugs ....................................... 47

Figure 15 – Ball-pressure apparatus ..................................................................................... 52

Figure 16 – Arrangement and dimensions of the electrodes for the tracking test ................... 54

Figure 17 – Diagram of the test circuit for the verification of short-circuit current

withstand of a two-pole equipment on a single-phase AC ...................................................... 56

Figure 18 – Diagram of the test circuit for the verification of short-circuit current

withstand of a three-pole equipment ..................................................................................... 57

Figure 19 – Diagram of the test circuit for the verification of short-circuit current

withstand of a four-pole equipment ....................................................................................... 58

Table 1 – Standard ratings .................................................................................................... 17

Table 2 – Voltage colour code............................................................................................... 20

Table 3 – Size for connectable conductors ............................................................................ 22

Table 4 – Flexing under mechanical load testing for copper conductors ............................... 27

Table 5 – Pulling force .......................................................................................................... 28

Table 6 – Voltage for dielectric strength test ......................................................................... 33

Table 7 – Breaking capacity .................................................................................................. 35

Table 8 – Normal operation ................................................................................................... 37

Table 9 – Test current and nominal cross-sectional area....................................................... 37

Table 10 – Cable type ........................................................................................................... 38

Table 11 – Metric cables ....................................................................................................... 40

Table 12 – AWG cables ........................................................................................................ 41

Table 13 – Pulling force and torque test values ..................................................................... 41

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IEC 62986:2017 © IEC 2017 – 5 –

Table 14 – Impact force ........................................................................................................ 45

Table 15 – Test force for glands ........................................................................................... 46

Table 16 – Torque values for terminal screws ....................................................................... 49

Table 17 – Distances through sealing compound .................................................................. 51

Table 18 – Standard sheets .................................................................................................. 60

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– 6 – IEC 62986:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PLUGS, SOCKET-OUTLETS AND COUPLERS WITH
ARCUATE CONTACTS
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 62986 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.
The text of this International Standard is based on the following documents:
FDIS Report on voting
23H/386/FDIS 23H/387/RVD

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

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IEC 62986:2017 © IEC 2017 – 7 –
In this standard, the following print types are used:
– requirements: in roman type;
– conformity statements: in italic type;
– notes: in small 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 "http://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.
A bilingual version of this publication may be issued at a later date.
---------------------- Page: 9 ----------------------
– 8 – IEC 62986:2017 © IEC 2017
INTRODUCTION

The object of this document is to provide for a safe, compact and practical IEC system of

standardized plugs and socket-outlets with arcuate contacts. It contains performance and

dimensional requirements taking into account essential differences in the infrastructures and

installation rules throughout the world.
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IEC 62986:2017 © IEC 2017 – 9 –
PLUGS, SOCKET-OUTLETS AND COUPLERS WITH
ARCUATE CONTACTS
1 Scope

This document sets the general and dimensional interchangeability requirements for plugs,

socket-outlets, connectors and appliance inlets with arcuate contacts of standardized

configurations (hereinafter referred to as accessories), with a rated operating voltage not

exceeding 600 V AC at a frequency of 50 Hz and 60 Hz and with rated currents of 20 A and

30 A, primarily intended for commercial use indoors, in conditions where the presence of

water is negligible.

This document applies to accessories for use when the ambient temperature is normally

within the range of –25 °C to +40 °C. These accessories are intended to be connected to

cables of copper or copper alloy only.
Interchangeability requirements are defined for IP20 accessories.

NOTE The conditions of use indoors are based on the limitations given by IEC 60364-5-51:2005, Table 51A, AD1.

Socket-outlets or appliance inlets incorporated in or fixed to electrical equipment are within

the scope of this document.
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 60227 (all parts), Polyvinyl chloride insulated cables of rated voltages up to and including

450/750 V
IEC 60228:2004, Conductors of insulated cables

IEC 60245-4, Rubber insulated cables – Rated voltages up to and including 450/750 V –

Part 4: Cords and flexible cables
IEC 60269-1, Low-voltage fuses – Part 1: General requirements

IEC 60269-2, Low-voltage fuses – Part 2: Supplementary requirements for fuses for use by

authorized persons (fuses mainly for industrial application) – Examples of standardized

systems of fuses A to K

IEC 60309-1:1999, Plugs, socket-outlets and couplers for industrial purposes – Part 1:

General requirements
IEC 60309-1:1999/AMD1:2005
IEC 60309-1:1999/AMD2:2012

IEC 60417, Graphical symbols for use on equipment (available at http://www.graphical-

symbols.info/equipment)
IEC 60529, Degrees of protection provided by enclosures (IP Code)
---------------------- Page: 11 ----------------------
– 10 – IEC 62986:2017 © IEC 2017

IEC 60664-1:2007, Insulation coordination for equipment within low-voltage systems – Part 1:

Principles, requirements and tests

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
NMX-J-436-ANCE-2014/CSA C22.2 No.49-14/ANSI/UL 62, Flexible Cords and Cables
UL 1581, Reference Standard for Electrical Wires, Cables and Flexible Cords
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
NOTE The application of accessories is shown in Figure 1.

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
---------------------- Page: 12 ----------------------
IEC 62986:2017 © IEC 2017 – 11 –
Socket-outlet
Plug
Flexible
cable
Plug and socket-outlet
Plug Connector
Cable coupler
Appliance
inlet Appliance
Connector
Flexible
cable
Appliance coupler
IEC
Figure 1 – Diagram showing the uses of the accessories
3.1
plug and socket-outlet

means enabling the connection at will of a flexible cable to fixed wiring. It consists of two

parts:
[SOURCE: IEC 60309-1:1999, 2.1]
3.1.1
socket-outlet

part intended to be installed with the fixed wiring or incorporated in equipment. A socket-outlet

may also be incorporated in the output circuit of an isolating transformer
[SOURCE: IEC 60309-1:1999, 2.1.1]
---------------------- Page: 13 ----------------------
– 12 – IEC 62986:2017 © IEC 2017
3.1.2
plug

part integral with or intended to be attached directly to one flexible cable connected to the

equipment or to a connector
[SOURCE: IEC 60309-1:1999, 2.1.2]
3.2
cable coupler

means enabling the connection at will of two flexible cables. It consists of two parts:

[SOURCE: IEC 60309-1:1999, 2.2]
3.2.1
connector
part integral with or intended to be attached to one flexible cab
...

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