CSA C22.2 No. 223:15

National Standard of Canada

(reaffirmed 2020)

Power supplies with extra-low-voltage Class 2 outputs

REVISED NOVEMBER 2020

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  Revision History

  CSA C22.2 No. 223:15, Power supplies with extra-low-voltage Class 2 outputs

  
  

  Update No. 1 — June 2017	Revision symbol (in margin)
  Clauses 4.2.8, 4.4.8.1, 4.4.8.2, 4.4.9.3, 4.4.9.7, 4.6.2.7, 4.12.9, 4.19, 6.2.3, 6.3.3, 6.3.4.2.1, 6.3.4.2.3, 6.3.4.3, 6.3.4.4, 6.3.4.5,	①
  6.7.3, 6.7.6, 6.7.7, 6.15.1, 6.16.1, 6.16.2, 6.19.2, and
  Tables 4 and 5
  Figures 5 and 6

  
  

  National Standard of Canada — November 2020

  Outside front cover, National Standard of Canada text, title page, and preface.

  
  

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  CSA C22.2 No. 223:15

  December 2015

  
  

  Title: Power supplies with extra-low-voltage Class 2 outputs

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National Standard of Canada

CSA C22.2 No. 223:15

Power supplies with extra-low- voltage Class 2 outputs

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ICS 29.200

ISBN 978-1-4883-0091-2

© 2015 Canadian Standards Association

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CSA C22.2 No. 223:15 Power supplies with extra-low-voltage Class 2 outputs

Contents

Technical Committee on Industrial Products 3

Subcommittee on Extra-Low Voltage Direct Plug-in and Cord Connected Transformers and Rectifiers 6

Preface 7

1. Scope 9

   
   

2. Reference publications 10

   
   

3. Definitions 12

   
   

4. Construction 12

   1. General requirements 12

   2. General 13

   3. Sources of fire hazard 14

   4. Enclosures 15

4.4.1 General 15

1. Protection against access to live parts 15

2. Outdoor use enclosures 16

1. Mechanical assembly 17

2. Supply connections 17

   1. Direct plug-in power supplies 17

   2. Cord-connected power supplies 18

3. Internal wiring 19

4. Electrical insulating materials 19

5. Transformers and magnetic components 19

6. Switches 21

7. Electrical spacings 21

8. Output connections 22

9. Strain relief and blade retention 23

10. Maximum output voltage 24

11. Provisions for limiting output current 24

12. Secondary circuit protection 24

13. Grounding and bonding 24

14. Printed wiring boards 25

15. — Deleted 25

16. Ground-fault circuit-interrupters 25

17. Backfeed protection 26

1. Marking 26

   5.8 Power supplies suitable for outdoor use 28

   5.8.4 Instructions for power supply suitable for outdoor use 29

   
   

2. Tests 29

   1. General 29

   2. Test conditions 30

      
      

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      CSA C22.2 No. 223:15 Power supplies with extra-low-voltage Class 2 outputs

      
      

      1. Voltage 30

      2. Frequency 30

      3. Ambient temperature 30

      4. Load 30

      5. Method of measurement 31

   3. Rating 31

      1. Open-circuit secondary voltage 31

      2. Rated input 31

      3. Rated output 32

      4. Maximum output current and power 32

   4. Temperature (normal) 33

   5. Dielectric strength 34

      1. Primary circuit 34

      2. Secondary circuit 34

      3. Transformers 35

   6. Leakage current 35

   7. Secondary circuit protection 36

   8. Abnormal 37

   9. Drop and impact 39

   10. Strain relief and blade retention 40

   11. Overload and endurance (primary circuit switches) 41

       1. General 41

       2. Overload 41

       3. Endurance 41

   12. Securement of components 41

   13. Securement of removable, folding, or retractable blades 41

       1. Folding or retractable blades 41

       2. Removable blades 42

       3. Blade test conclusion 42

   14. Insulating material 42

   15. Compression (rod) 42

   16. Deformation (non-metallic enclosures) 42

   17. Rain 43

   18. Water immersion 43

   19. UV Exposure Conditioning 44

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CSA C22.2 No. 223:15 Power supplies with extra-low-voltage Class 2 outputs

Preface

This is the third edition of CSA C22.2 No. 223, Power supplies with extra-low-voltage Class 2 outputs, one of a series of Standards issued by the CSA Group under Part II of the Canadian Electrical Code. It supersedes the previous editions published in 1991 and 1987.

This edition also incorporates CSA Technical Information Letter (TIL) No. I-42; Interim Certification Requirements for Direct Plug-in and Cord-Connected Power Supplies with Extra-Low-Voltage Class 2 Output for Outdoor Use.

For general information on Standards of the Canadian Electrical Code, Part II, see the preface of CAN/CSA-C22.2 No. 0, General Requirements — Canadian Electrical Code, Part II.

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

This Standard was prepared by a Subcommittee on Extra-Low Voltage Direct Plug-in and Cord Connected Transformers and Rectifiers under the jurisdiction of the Technical Committee on Industrial Products and the Standards Steering Committee on Canadian Electrical Code, Part II and has been formally approved by the Technical Committee.

This Standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group.

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 Group’s procedures for interpretation shall be followed to determine the intended safety principle.”

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

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   1. Standard designation (number);

      
      

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      CSA C22.2 No. 223:15 Power supplies with extra-low-voltage Class 2 outputs

      
      

   2. relevant clause, table, and/or figure number;

   3. wording of the proposed change; and

   4. rationale for the change.

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CSA C22.2 No. 223:15 Power supplies with extra-low-voltage Class 2 outputs

CSA C22.2 No. 223:15

Power supplies with extra-low-voltage Class 2 outputs

1 Scope

1.1

This Standard applies to

1. indoor and outdoor use Class 2 power supplies with input power of 660 W or less. These units are of both the direct plug-in and cord-connected types that utilize a step-down, isolating transformer and that may incorporate rectifiers and other components to provide an ac or dc output;

2. Class 2 power supplies as in Item a) employed as battery chargers for rechargeable batteries; and

   Note: For convenience, the term “power supply” may be used throughout this Standard.

3. identified Class 2 outputs or extra-low voltage outputs of products covered by other standards. For example, permanently connected units covered by CSA C22.2 No. 107.1.

This Standard also provides direct plug-in requirements for products covered by other standards.

1.2

This Standard applies to power supplies intended for use in non-hazardous locations in accordance with the Rules of the Canadian Electrical Code, Part I, when connected to a nominal system voltage of 120 V or 240 V supply. In addition, this Standard applies to permanently connected power supplies intended for use in Class 2 lighting systems for a nominal system voltage up to 600 V.

1.3

These requirements do not cover the effect that a power unit may have on the equipment or system to which it is connected. A product marked for a specific end-use involving additional considerations may be subject to additional requirements found in the applicable end-product standard.

1.4

This Standard does not include requirements for batteries.

1.5

This Standard does not apply to

1. nonautomotive battery chargers that do not have a Class 2 output;

2. automotive battery chargers;

3. transformerless, non-isolated battery chargers for charging special purpose battery packs; or

4. the functional charging requirements of non-automotive battery chargers with Class 2 outputs.

Note: These categories are covered by CAN/CSA-C22.2 No. 107.2 or CAN/CSA-E60335-2-29.

1.6

This Standard does not apply to products that do not have an identified Class 2 output.

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