CSA C22.2 No. 33:19

National Standard of Canada

Electrical safety requirements for cranes and hoists

REVISED JANUARY 2021

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  CSA C22.2 No. 33:19, Electrical safety requirements for cranes and hoists

  
  

  Update No. 1 — January 2021	Revision symbol (in margin)
  Clauses 3, 5.5.3.2, 6.4, 8.1.2, 8.3.2, 8.4, and 8.4.1	①

  
  

  CSA C22.2 No. 33:19 May 2019

  
  

  Title: Electrical safety requirements for cranes and hoists

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National Standard of Canada

CSA C22.2 No. 33:19

Electrical safety requirements for cranes and hoists

®A trademark of the Canadian Standards Association, operating as “CSA Group”

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ICS 53.020.20, 43.040.10, 73.100.40

ISBN 978-1-4883-1707-1

© 2019 Canadian Standards Association

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Contents

Technical Committee on Industrial Products 3 Subcommittee on Electric Cranes and Hoists 5 Preface 8

1. Scope 9

   
   

2. Reference publications 10

   
   

3. Definitions 12

   
   

4. General requirements 14

   
   

5. Construction requirements 15

   1. General 15

   2. Incoming service and feeders 15

      1. Main disconnecting means 15

      2. Electrical spacing 15

      3. Main contact and bridge contact conductor systems 16

      4. Collector shoes and wheels 17

   3. Grounding and bonding 17

   4. Protection of crane and hoist equipment 18

      1. General 18

      2. Over-current protection 18

      3. Overload protection 19

      4. Reverse phase protection 19

   5. Control functions and control circuits 19

      1. General 19

      2. Mainline contactor 20

      3. Position sensors and control devices 20

      4. Control panels 20

   6. Enclosures 20

      1. General 20

      2. Self-enclosed and specially designed enclosures 21

      3. Doors and covers 21

      4. Outdoor use 21

      5. Supplementary housing 21

      6. Live parts protection 21

      7. Enclosure working space 21

      8. Enclosures of resistors, switches, etc. 21

   7. Conductors and cables 21

      1. General 21

      2. Outdoor use 22

      3. Size of conductors 22

      4. Connections 22

      5. Conductors of different temperature classifications 22

         
         

         May 2019 © 2019 Canadian Standards Association 1

      6. Conductors of different voltages 22

      7. Colour coding 23

   8. Motors and drives 23

      1. General 23

      2. Motor controllers (alternating and direct current) 23

      3. Ac drives 24

   9. Additional requirements to battery-operated operator control units 24

      1. General 24

      2. Batteries and battery circuits 24

      3. Test on battery circuits 25

      4. Creepage distances and clearances 27

      5. Mechanical strength 27

      6. Replaceable batteries 27

         
         

6. Special construction requirements for monorail hoists separate from cranes 28

   1. General 28

   2. Off-point interlock 28

   3. Limit switch 28

   4. Mechanical slip clutch 28

      
      

7. Markings 28

   1. General 28

   2. Details required 28

   3. Instructions 29

      
      

8. Equipment test 29

   1. General type test requirement 29

8.1.2 — Deleted 29

1. Switch and controller tests 29

2. Factory test 30

   1. Dielectric strength 30

   2. — Deleted 30

3. Mould stress relief test for conductor bar systems 30

Annex A (informative) — Wireless remote control system 34

Annex B (informative) — Requirements for dc drives 38

Annex C (informative) — Requirements for contact conductors 39

May 2019 © 2019 Canadian Standards Association 2

Preface

This is the fourth edition of CSA C22.2 No. 33, Electrical safety requirements for cranes and hoists, one of a series of Standards issued by CSA Group under Part II of the Canadian Electrical Code. It supersedes

the previous edition published in 1984 under the title Construction and test of electric cranes and hoists.

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 Electric Cranes and Hoists, under the jurisdiction of the Technical Committee on Industrial Products and the Strategic Steering Committee on Requirements for Electrical Safety, 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 interpretations 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 CSA committee interpretation has not already been published, CSA Group’s procedures for interpretation shall be followed to determine the intended safety principle.”

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 Standard 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 Standard.

4. To submit a request for interpretation of this Standard, please send the following information to

   inquiries@csagroup.org and include “Request for interpretation” in the subject line:

   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. where possible, phrase the request in such a way that a specific “yes” or “no” answer will address the issue.

      Committee interpretations are processed in accordance with the CSA Directives and guidelines governing standardization and are available on the Current Standards Activities page at standardsactivities.csa.ca.

5. This Standard is subject to review within five years from the date of publication. Suggestions for its improvement will be referred to the appropriate committee. To submit a proposal for change, please send the following information to inquiries@csagroup.org and include “Proposal for change” in the subject line:

   1. Standard designation (number);

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

   3. wording of the proposed change; and

   4. rationale for the change.

May 2019 © 2019 Canadian Standards Association 8

CSA C22.2 No. 33:19

Electrical safety requirements for cranes and hoists

1. Scope

   
   

   1.1

   This Standard applies to all types of electric cranes, including electric overhead travelling cranes, and hoists for vertical lifting and lowering of freely suspended load for voltages of 750 V and less between conductors. The equipment specified in this Standard is intended for installation in accordance with CSA C22.1, Canadian Electrical Code, Part I.

   Note: Examples of electric overhead traveling cranes are

   1. single and double girder;

   2. gantry;

   3. semi-gantry;

   4. portal cranes,

   5. jib cranes;

   6. monorail systems;

   7. hoists; and

   8. trolley.

   
   

   1.2

   This Standard applies to the following cranes and hoists electrification systems:

   1. bare non-rigid and rigid contact conductors, collector shoes and wheels, and associated fittings; and

   2. insulated conductor bar assemblies, collector trolley assemblies, and associated fittings (such as splices, power feeds, hangers, end caps, and similar).

   
   

   1.3

   This Standard applies to equipment for general industrial and commercial application, in nonhazardous locations for indoor and outdoor locations.

   
   

   1.4

   This Standard applies to equipment for installation in an ambient temperature not exceeding 40 °C.

   
   

   1.5

   This Standard applies to wireless control equipment used in conjunction with electric cranes and hoists.

   
   

   1.6

   This Standard does not apply to

   1. elevators;

   2. dumbwaiters;

   3. stairway hoists;

   4. tower cranes;

   5. manually operated chain driven cranes;

      
      

      May 2019 © 2019 Canadian Standards Association 9

   6. mobile cranes;

   7. draglines;

   8. mine hoists;

   9. guided loads;

   10. below the hook attachments; and

   11. construction cranes and hoists.

   
   

   1.7

   In this Standard, “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.

   
   

2. Reference publications

This Standard refers to the following publications, and where reference is made it shall be to the edition listed below, including all amendments thereto.

Note: In cases where the editions listed below are amended, replaced by new editions, or superseded by another standard during the life of this referencing Standard, it is the responsibility of the users of this Standard to investigate the possibility of applying those amendments, new editions, or superseding Standards.

CSA Group

B167-16

Overhead cranes, gantry cranes, monorails, hoists, and jib cranes

C22.1-18

Canadian Electrical Code, Part I

CAN/CSA-C22.2 No. 0-10 (R2015)

General requirements — Canadian Electrical Code, Part II

C22.2 No. 0.4-17

Bonding of electrical equipment

C22.2 No 0.8-12 (R2016)

Safety functions incorporating electronic technology

C22.2 No 0.15-15

Adhesive labels

CAN/CSA-C22.2 No. 0.17-00 (R2013)

Evaluation of properties of polymeric materials

May 2019 © 2019 Canadian Standards Association 10