C22.2 No. 0-10

General requirements — Canadian Electrical Code, Part II

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CSA Standards Update Service

C22.2 No. 0-10

September 2010

Title: General requirements — Canadian Electrical Code, Part II

Pagination: 60 pages (vii preliminary and 53 text), each dated September 2010

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CSA Standard

C22.2 No. 0-10

General requirements — Canadian Electrical Code, Part II

Published in September 2010 by Canadian Standards Association A not-for-profit private sector organization

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ISBN 978-1-55491-514-9

Technical Editor: Tim Pope

© Canadian Standards Association — 2010

All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher.

© Canadian Standards Association General requirements — Canadian Electrical Code, Part II

Contents

Technical Committee on General Requirements v

Subcommittee on C22.2 No. 0 vi

Preface vii

1. Scope and object 1

   1. Scope of this Standard 1

   2. Scope of the individual Standards of the Canadian Electrical Code, Part II 1

   3. Objective of the Canadian Electrical Code, Part II 1

   4. Terminology 1

      
      

2. Reference publications 2

   
   

3. Definitions in Canadian Electrical Code, Part II, Standards 3

   
   

4. General requirements 4

   1. Application of this Standard 4

   2. Application to individual Standards 4

   3. Compliance with Standards 5

   4. Safety and protection 5

      1. Design and construction 5

      2. Exposed moving parts 5

      3. Federal regulations 5

      4. Equipment resembling toys 5

      5. Disconnecting means 5

      6. Equipment requiring service or maintenance 6

   5. Materials and quality of work 6

   6. Basis for compliance 6

      
      

5. Construction details 7

   1. Bases for the mounting of live parts 7

   2. Terminal parts 7

   3. Size of screws 7

   4. Material for screws and related hardware 7

   5. Terminal plates and threading 8

   6. Identification 8

   7. Bonding and grounding provisions 9

   8. Switches and overcurrent protection in identified, bonding, and grounding conductors 9

   9. Polarization 9

   10. Over-surface and through-air spacings 9

   11. Protection and enclosures 10

   12. Threaded conduit entries 11

   13. Boxes for wiring terminal parts 11

       1. Size 11

       2. Construction 11

   14. Wiring connections 11

   15. Rough edges 12

   16. Supply connections 12

   17. Provision for clearance holes for conduit connection 13

   18. Equipment for mounting on or over combustible surfaces 13

       
       

       September 2010 iii

       C22.2 No. 0-10 © Canadian Standards Association

       
       

       
       

   19. Bolted aluminum busbar joints 13

   20. Equipment attachment plug rating 13

   21. Laser safety 14

   22. Lithium batteries 14

   23. Maximum temperatures 14

   24. Surface temperatures 14

   25. Adhesives 14

   26. Access to terminals 15

   27. Components mounted on covers 15

       
       

6. Marking 15

   1. Marking required 15

   2. Double-insulated equipment 16

   3. Language of markings 16

      
      

7. Tests 16

   1. Voltage 16

   2. Temperature determination 17

   3. Dielectric strength 17

   4. Test requirements for a knockout surrounded by multiple twistouts 18

   5. Leakage current 18

   6. Cheesecloth 19

Annexes

A (informative) — Gauge numbers and thicknesses of sheet metal 23

B (informative) — Classes of electrical insulation 28

C (informative) — Marking translations 30

D (normative) — Definitions for use in Canadian Electrical Code, Part II, Standards 32

E (normative) — Construction of bolted aluminum busbar joints 47

F (informative) — Electrical busbars and joints 51

Tables

1. — Recommended diameters of conduit openings and flat surfaces surrounding conduit openings 19

2. — Surface temperatures 20

3. — Leakage current test circuits 20

Figures

1. — Symbol for double-insulated equipment 21

2. — Test plate (showing area of support with respect to location of twistouts) 21

3. — Leakage current measurement circuits 22

iv September 2010

© Canadian Standards Association General requirements — Canadian Electrical Code, Part II

Technical Committee on General Requirements

W.H. Anquetil Electrical Safety First, Orangeville, Ontario

Chair

W. Hassan Northern Lights Asset Management Ltd., Oakville, Ontario

R.J. Kelly Nunavut Department of Community and Government Services,

Iqaluit, Nunavut

G. Lobay Natural Resources Canada, Ottawa, Ontario

D.R. MacLeod Nova Scotia Department of Labour and

Workforce Development, Halifax, Nova Scotia

T. Olechna Electrical Safety Authority, Mississauga, Ontario

K.L. Rodel Hubbell Canada LP, Pickering, Ontario

V. Rowe Westbank, British Columbia

M. Smith Rockwell Automation Canada Inc., Cambridge, Ontario

A. Tsisserev Stantec Consulting, Vancouver, British Columbia

T. Pope Canadian Standards Association, Mississauga, Ontario

Project Manager

September 2010 v

C22.2 No. 0-10 © Canadian Standards Association

Subcommittee on C22.2 No. 0

G. Lobay Natural Resources Canada, Ottawa, Ontario

Chair

R.M. Bartholomew Electric Power Equipment Limited,

Vancouver, British Columbia

D. Li CSA International,

Toronto, Ontario

A. Milne 21st Olympiad Sales, Toronto, Ontario

K. Powell Criterions,

Glen Williams, Ontario

D. Singh Toronto, Ontario

M. Smith Rockwell Automation Canada Inc., Cambridge, Ontario

A. Tsisserev Stantec Consulting, Vancouver, British Columbia

J. Wiseman Square D Company, Nashville, Tennessee, USA

T. Pope Canadian Standards Association, Mississauga, Ontario

Project Manager

vi September 2010

© Canadian Standards Association General requirements — Canadian Electrical Code, Part II

Preface

This is the tenth edition of CSA C22.2 No. 0, General requirements — Canadian Electrical Code, Part II. It supersedes the previous editions, published in 1991, 1982, 1975, 1960, 1956, 1950, 1941, 1936, and

1932.

This edition of the Standard contains new requirements for equipment containing lasers or lithium batteries, criteria for use of adhesives in construction of electrical equipment, surface temperature limits, attachment plug loading, and maximum temperature of equipment in contact with gypsum. This edition also incorporates a compressive list of definitions for use in standards for electrical products and outlines the relationship between this Standard and electrical product standards.

The Canadian Electrical Code is a publication issued by CSA in several parts. Among these are Part I, which establishes safety standards for the installation and maintenance of electrical equipment, and Part II, which consists of safety standards governing the construction, testing, and marking of electrical equipment.

Part II Standards are prepared by Subcommittees that operate under the jurisdiction of Technical Committees, which in turn are responsible to the Strategic Steering Committee on Requirements for Electrical Safety. In the preparation of these Standards, the views of interested organizations are taken into account, i.e., regulatory authorities, industrial organizations, and representatives of general interests.

This Standard is considered suitable for use for conformity assessment within the stated scope of the Standard.

This Standard was prepared by the Subcommittee on C22.2 No. 0, under the jurisdiction of the Technical Committee on General Requirements and the Strategic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the Technical Committee. It will be submitted to the Standards Council of Canada for approval as a National Standard of Canada.

Interpretations: The Strategic Steering Committee on Requirements for Electrical Safety has provided the following direction for the interpretation of standards under its jurisdiction: “The literal text shall be used in judging compliance of products with the safety requirements of this Standard. When the literal text cannot be applied to the product, such as for new materials or construction, and when a relevant committee interpretation has not already been published, CSA’s procedures for interpretation shall be followed to determine the intended safety principle.”

September 2010

Notes:

1. Use of the singular does not exclude the plural (and vice versa) when the sense allows.

2. Although the intended primary application of this Standard is stated in its Scope, it is important to note that it remains the responsibility of the users of the Standard to judge its suitability for their particular purpose.

3. This publication was developed by consensus, which is defined by CSA Policy governing standardization — Code of good practice for standardization as “substantial agreement. Consensus implies much more than a simple majority, but not necessarily unanimity”. It is consistent with this definition that a member may be included in the Technical Committee list and yet not be in full agreement with all clauses of this publication.

4. CSA Standards are subject to periodic review, and suggestions for their improvement will be referred to the appropriate committee.

5. All enquiries regarding this Standard, including requests for interpretation, should be addressed to Canadian Standards Association, 5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N6.

   Requests for interpretation should

   1. define the problem, making reference to the specific clause, and, where appropriate, include an illustrative sketch;

   2. provide an explanation of circumstances surrounding the actual field condition; and

   3. be phrased where possible to permit a specific “yes” or “no” answer.

Committee interpretations are processed in accordance with the CSA Directives and guidelines governing standardization and are published in CSA’s periodical Info Update, which is available on the CSA Web site at www.csa.ca.

September 2010 vii

© Canadian Standards Association General requirements — Canadian Electrical Code, Part II

C22.2 No. 0-10

General requirements — Canadian Electrical Code, Part II

1. Scope and object

   
   

   1. Scope of this Standard

      This Standard specifies requirements pertaining to the following:

      1. definitions;

      2. construction;

      3. equipment complying with Standards;

      4. safety and protection;

      5. materials and quality of work;

      6. marking; and

      7. tests (of a general nature).

      Such requirements are applicable to all individual Standards of the Canadian Electrical Code, Part II (see Clause 1.4).

      
      

   2. Scope of the individual Standards of the Canadian Electrical Code, Part II

      The individual Standards of the Canadian Electrical Code, Part II, provide definitions and specify construction, marking, and test requirements for a single class or closely allied group of electrical equipment.

      
      

   3. Objective of the Canadian Electrical Code, Part II

      The objective of Standards issued as part of the Canadian Electrical Code, Part II, is to give consideration to the prevention of injury to persons and damage to property through proper design, good construction, and high quality of work. These safety Standards are intended to provide requirements for the design and construction of electrical equipment, primarily to address fire and electrical shock hazards and for use throughout Canada in conformity with the rules of the Canadian Electrical Code, Part I.

      
      

   4. Terminology

In CSA standards, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the standard.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (nonmandatory) to define their application.

September 2010 1