CSA C22.2 No. 94.2:15

(reaffirmed 2020)

Enclosures for electrical equipment, environmental considerations

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  CSA C22.2 No. 94.2:15

  October 2015

  
  

  Title: Enclosures for electrical equipment, environmental considerations

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  Association of Standardization and Certification NMX-J-235/2-ANCE-2015

  Third Edition

  
  

  CSA Group

  CSA C22.2 No. 94.2-15

  Second Edition

  
  

  Underwriters Laboratories Inc. UL 50E

  Second Edition

  
  

  Enclosures for Electrical Equipment, Environmental Considerations

  
  

  October 16, 2015

  
  

  
  

  ANSI/UL 50E-2015

  Commitment for Amendments

  
  

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  CONTENTS

  Preface 5

  1. Scope 7

  2. Units of Measurement 7

  3. Components 7

  4. Normative References 8

  5. Definitions 8

  6. Enclosure Types and Applications 11

  7. Construction 11

     1. Polymeric materials 11

     2. Corrosion protection 12

     3. Openings 14

     4. Conduit connection 16

     5. External operating mechanisms 16

     6. Access to interior 17

     7. Gaskets 17

  8. Tests 18

     1. General 18

     2. Drip test 18

     3. Rain test 19

     4. Dust test 20

     5. External icing test 22

     6. Hosedown test 22

     7. Indoor corrosion protection 23

     8. Outdoor corrosion protection 24

     9. Additional corrosion protection for type 3X, 3RX, 3SX, 4X and 6P 26

     10. Submersion test 26

     11. Pressure test 26

     12. Oil exclusion test 27

     13. Gasket tests 28

     14. Rod entry test 29

     15. Misalignment test 29

     16. Water exposure and immersion 30

  9. Marking 30

     1. General 30

     2. Type designations 30

     3. Supplemental markings 31

     4. Location 31

     5. Orientation 31

     6. Equipment openings 32

     7. Drainage openings 32

     8. Screws and screw type fasteners 32

Tables 33

Figures 38

Annex A – Standards For Components (Normative)

Annex B – Reference Standards (Normative)

Annex C – Permanence Of Marking (Normative In The United States Only)

Annex D – Water Immersion Test (Normative)

1. Water Exposure and Immersion 47

   1. General 47

   2. Dimensional change 47

   3. Water exposure and immersion test 48

Preface

This is the harmonized ANCE, CSA Group, and UL standard for Enclosures for Electrical Equipment, Environmental Considerations. It is the third edition of NMX-J-235/2-ANCE-2015, the second edition of CSA C22.2 No. 94.2-15, and the second edition of UL 50E. This edition of CSA C22.2 No. 94.2 supersedes the previous edition published in 2007. This edition of UL 50E supersedes the previous edition published on September 4, 2007.

This harmonized standard was prepared by the Association of Standardization and Certification (ANCE), CSA Group, and Underwriters Laboratories Inc. (UL). The efforts and support of Technical Harmonization Committee 70/31 are gratefully acknowledged.

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

The present Mexican standard was developed by the CT CDI Control y Distribución Industrial from the Comité de Normalización de la Asociación de Normalización y Certificación, A.C., CONANCE, with the collaboration of the enclosures manufacturers and users.

This standard was reviewed by the CSA Integrated Committee on Enclosures, under the jurisdiction of the CSA Technical Committee on Industrial Products and the CSA Strategic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the CSA Technical Committee.

This standard has been approved by the American National Standards Institute (ANSI) as an American National Standard.

Application of Standard

Where reference is made to a specific number of samples to be tested, the specified number is considered a minimum quantity.

Note: 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.

Level of harmonization

This standard uses the IEC format but is not based on, nor is it considered equivalent to, an IEC standard. This standard is published as an equivalent standard for ANCE, CSA Group, and UL.

An equivalent standard is a standard that is substantially the same in technical content, except as follows: Technical national differences are allowed for codes and governmental regulations as well as those recognized as being in accordance with NAFTA Article 905, for example, because of fundamental climatic, geographical, technological, or infrastructural factors, scientific justification, or the level of protection that the country considers appropriate. Presentation is word for word except for editorial changes.

Reasons for differences from IEC

The THSC investigated and found no existing IEC standards or work programs covering the scope of the products in this standard.

Interpretations

The interpretation by the standards development organization of an identical or equivalent standard is based on the literal text to determine compliance with the standard in accordance with the procedural rules of the standards development organization. If more than one interpretation of the literal text has been identified, a revision is to be proposed as soon as possible to each of the standards development organizations to more accurately reflect the intent.

Enclosures for Electrical Equipment, Environmental Considerations

1. Scope

   
   

   1. This standard applies to enclosures for electrical equipment intended to be installed and used in non-hazardous locations in accordance with the Canadian Electrical Code, Part I, CSA C22.1, the provisions of the National Electrical Code, NFPA 70, and the provisions of Mexico’s Electrical Installations, NOM-001-SEDE, as follows:

      
      

      1. Enclosures for indoor locations, Types 1, 2, 5, 12, 12K, and 13; and

         
         

      2. Enclosures for indoor or outdoor locations, Types 3, 3X, 3R, 3RX, 3S, 3SX, 4, 4X, 6, and 6P.

         
         

   2. This standard covers additional environmental construction and performance requirements for enclosures. The general requirements for enclosures are contained in CSA C22.2 No. 94.1, UL 50, and NMX-J-235/1-ANCE (See Annex B, Ref. No. 10) or the end-use product standards that are to be used in conjunction with this standard.

      
      

   3. This standard does not cover the requirements for protection of devices against conditions such as condensation, icing, corrosion, or contamination that may occur within the enclosure or that may enter via conduit or unsealed openings.

      
      

   4. Where an individual product standard contains requirements that are at variance with those of this standard, the requirements of the individual product standard take precedence.

      
      

2. Units of Measurement

   
   

   1. The values given in SI (metric) units shall be normative. Any other values given shall be for informational purposes only.

      
      

3. Components

   
   

   1. Except as indicated in Clause 3.2, a component of a product covered by this standard shall comply with the requirements for that component. See Annex A for a list of standards covering components generally used in the products covered by this standard. A component shall comply with the ANCE, CSA Group, or UL standards as appropriate for the country where the product is to be used.

      
      

   2. A component is not required to comply with a specific requirement that:

      
      

      1. Involves a feature or characteristic not required in the application of the component in the product covered by this standard, or

         
         

      2. Is superseded by a requirement in this standard.

         
         

   3. A component shall be used in accordance with its rating established for the intended conditions of use.