CSA C22.4 No. 1:09

(reaffirmed 2018)

Objective-based industrial electrical code

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Standards Update Service

C22.4 No. 1-09

January 2009

Title: Objective-based industrial electrical code

Pagination: 28 pages (viii preliminary and 20 text), each dated January 2009

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CSA Standard

C22.4 No. 1-09

Objective-based industrial electrical code

Published in January 2009 by Canadian Standards Association A not-for-profit private sector organization

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ISBN 978-1-55436-800-6

Technical Editor: Michael Wilson

Permission to use extracts from IEC 60364-1:2005 was provided by Standards Council of Canada, in co-operation with IHS Canada. No further reproduction is permitted without prior written approval from Standards Council of Canada.

© Canadian Standards Association — 2009

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

Contents

Technical Committee on the Objective-Based Industrial Electrical Code v

Subcommittee on the Objective-Based Industrial Electrical Code — Technical Content vii

Preface viii

0 Object 1

1. Scope 1

   
   

2. Reference publications 2

   
   

3. Definitions 2

   
   

4. Protection for safety 3

   1. General 3

   2. Protection against electric shock 3

      1. Basic protection (protection against direct contact) 3

      2. Fault protection (protection against indirect contact) 4

   3. Protection against thermal effects 4

   4. Protection against overcurrent 4

   5. Protection against fault currents 4

   6. Protection against voltage disturbances 4

   7. Protection against electromagnetic influences 4

   8. Protection against power supply interruption 5

      
      

5. Design 5

   1. General 5

   2. Characteristics of available supply 5

      1. General 5

      2. Characteristics 5

   3. Nature of demand 6

   4. Electric supply systems for safety services or standby electric supply systems 6

   5. Environmental conditions 6

   6. Cross-section (size) of conductors 6

   7. Type of wiring and methods of installation 7

   8. Protective equipment 7

   9. Emergency control 7

   10. Disconnecting devices 7

   11. Prevention of mutual detrimental influence 7

   12. Accessibility of electrical equipment 7

   13. Run-to-failure 8

       1. General 8

       2. Design 8

   14. Documentation 8

       
       

6. Selection of electrical equipment 8

   1. General 8

   2. Characteristics 8

      1. Compatibility 8

      2. Voltage 9

      3. Current 9

      4. Frequency 9

      5. Load factor 9

   3. Conditions of installation 9

   4. Prevention of harmful effects 9

      
      

7. Erection and verification of electrical installations 9

   1. Erection 9

   2. Verification 10

      
      

8. Operation and maintenance 10

   1. General 10

   2. Operation 10

   3. Maintenance 11

   4. Mothballing and decommissioning 11

Annexes

A (normative) — Electrical equipment selection criteria 12

B (informative) — Technical references 15

Technical Committee on the Objective-Based Industrial Electrical Code

1. Leduc Marex Canada Limited, Calgary, Alberta

   
   

   Chair

   
   

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

   Vice-Chair

   
   

   W.H. Anquetil Schneider Canada Inc., Mississauga, Ontario

   Associate

   
   

2. Bygrave Michelin North America (Canada) Inc., New Glasgow, Nova Scotia

J. Dickin Dickin Engineering Inc., Red Deer, Alberta

Associate

S.W. Douglas IAEI,

Cambridge, Ontario

T.S. Driscoll Shell Canada Limited, Calgary, Alberta

T. Flood A.J. Flood and Associates, Burlington, Ontario

Associate

G. Haines Ontario Power Generation, Niagara-on-the-Lake, Ontario

N. Hawkins Ontario Ministry of Labour, Toronto, Ontario

S. Hawkins ShawCor Ltd., Toronto, Ontario

R. Johnson Power Workers’ Union, New Liskeard, Ontario

Associate

R. Lajeunesse Régie du bâtiment du Québec, Montréal, Québec

P. Liberatore Corporation des maîtres électriciens du Québec, Montréal, Québec

P. McDonald Alberta Municipal Affairs, Edmonton, Alberta

L. McGuire Invista (Canada), Kingston, Ontario

1. Misyk The Inspections Group Inc., Edmonton, Alberta

   
   

   D.G. Morlidge Fluor Canada Ltd., Calgary, Alberta

   
   

   J.P. Neu Electro-Federation Canada, Mississauga, Ontario

   
   

2. Olechna Electrical Safety Authority, Mississauga, Ontario

S. Paulsen New Brunswick Department of Public Safety, Fredericton, New Brunswick

K. Powell Criterions,

Glen Williams, Ontario

Associate

V.G. Rowe Westbank, British Columbia Associate

B.A. Savaria Eaton Electrical, Burlington, Ontario

T. Simmons British Columbia Institute of Technology, Burnaby, British Columbia

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

Associate

B. Trenholm Petro-Canada,

St. John's, Newfoundland and Labrador

Associate

A. Tsisserev City of Vancouver, Vancouver, British Columbia

M.J. Wilson Canadian Standards Association, Mississauga, Ontario

Project Manager

Subcommittee on the Objective-Based Industrial Electrical Code — Technical Content

T.S. Driscoll Shell Canada Limited, Calgary, Alberta

Chair

M. Cole Hubbell Canada LP, Pickering, Ontario

J. Dickin Dickin Engineering Inc., Red Deer, Alberta

T. Flood A.J. Flood and Associates, Burlington, Ontario

G. Haines Ontario Power Generation, Niagara-on-the-Lake, Ontario

R. Leduc Marex Canada Limited, Calgary, Alberta

P. Marcucci Electrical Safety Authority, Mississauga, Ontario

D.G. Morlidge Fluor Canada Ltd., Calgary, Alberta

J.P. Neu Electro-Federation Canada, Mississauga, Ontario

T. Olechna Electrical Safety Authority, Mississauga, Ontario

K. Powell Criterions,

Glen Williams, Ontario

V.G. Rowe Westbank, British Columbia

B.A. Savaria Eaton Electrical, Burlington, Ontario

R. Stromer Imperial Oil Limited, Calgary, Alberta

M.J. Wilson Canadian Standards Association, Mississauga, Ontario

Project Manager

Preface

This is the first edition of CSA C22.4 No. 1, Objective-based industrial electrical code.

Permission to use extracts from IEC 60364-1:2005 was provided by Standards Council of Canada, in co-operation with IHS Canada. No further reproduction is permitted without prior written approval from Standards Council of Canada.

This Code was prepared by the Subcommittee on the Objective-Based Industrial Electrical Code — Technical Content, under the jurisdiction of the Technical Committee on the Objective-Based Industrial Electrical Code and the Strategic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the Technical Committee.

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”.

January 2009

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 Code is stated in its Scope, it is important to note that it remains the responsibility of the users of the Code 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 Code, 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.

viii January 2009

C22.4 No. 1-09

Objective-based industrial electrical code

0 Object

This Code is intended for use by an authorized user in conjunction with the implementation of a safety management system developed in accordance with CSA C22.4 No. 2, Objective-based industrial electrical code — Safety management system requirements, and as detailed in the authorized user’s OBIEC safety management manual. This Code provides references to applicable industry-recognized standards, codes, and recommended practices. This Code is intended to apply only to industrial facilities.

This Code is not intended to permit the use or modification of electrical equipment in a manner outside either the application for which the equipment was certified or the written instructions provided by the manufacturer.

1 Scope

1.1

This Code specifies objectives to provide for the safety of persons, livestock, and property against dangers and damage that can arise from the use of electrical installations and to provide for the proper functioning of those installations. In addition, this Code sets objectives for the protection of property against damage, if the damage can lead to unsafe events or conditions for persons and livestock.

1.2

This Code specifies safety objectives for the following criteria in relation to electrical systems operating or intended to operate at all voltages in electrical installations within industrial facilities:

1. design;

2. selection of electrical equipment;

3. erection and verification; and

4. operation and maintenance.

1.3

This Code specifies technical provisions to address the safety objectives. The technical references in this Code are not exclusive and do not necessarily represent all acceptable solutions that might be considered to have a bearing on the objectives of this Code.

1.4

This Code and any standards referenced herein do not make or imply any assurance or guarantee with respect to the life expectancy, durability, or operating performance of the equipment and material referenced herein.

1.5

In CSA Standards, “shall” is used to express a requirement, i.e., a provision that the authorized 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; “may” is used to express an option or that which is permissible within the limits of the standard; and “can” is used to express possibility or capability. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note

January 2009 1