This is the harmonized ANCE, CSA Group, and UL standard for Enclosures for Electrical Equipment, Non- Environmental Considerations. It is the third edition of NMX-J-235/1-ANCE, the second edition of CAN/CSA C22.2 No. 94.1, and the thirteenth edition of UL 50. This edition of CSA C22.2 No. 94.1 supersedes the previous edition published in 2007. This edition of UL 50 supersedes the previous edition published on September 4, 2007. This harmonized standard has been jointly revised on October 15, 2020. For this purpose, CSA Group and UL are issuing revision pages dated October 15, 2020, and ANCE is issuing a new edition dated October 15, 2020.

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.

Scope

1.1

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:

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

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

1.2

This standard covers the non-environmental construction and performance requirements for enclosures to provide a degree of protection to personnel against incidental contact with the enclosed equipment. The additional environmental construction and performance requirements for enclosures are located in CSA C22.2 No. 94.2, UL 50E, and NMX-J-235/2-ANCE (See Annex B, Ref. No. 15), which are intended to be used in conjunction with this standard.

1.3

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.

1.4

In the United States and Mexico, cabinets and cutout boxes and junction and pull boxes are covered by Clauses 9 and 10 of this Standard. In Canada, junction boxes, cutout boxes, and pull boxes are covered by CSA C22.2 No. 40 and are not covered by this standard. See Annex B, Ref. No. 12.

1.5

Outlet boxes having a volume of not more than 1640 cm3 (100 in3) are covered by CSA C22.2 No. 18.1, NMX-J-023/1-ANCE, and the UL 514 series (see Annex B, Ref. No. 6 and 13) and are not covered by this standard.

1.6

In Canada and the United States, swimming pool type junction boxes are covered by CSA C22.2 No. 89 and UL 1241 (see Annex B, Ref. No. 11) and are not covered by this standard.

This is the harmonized ANCE, CSA Group, and UL standard for Enclosures for Electrical Equipment, Environmental Considerations. It is the fourth edition of NMX-J-235/2-ANCE-2020, the third edition of CSA C22.2 No. 94.2-20, and the third edition of UL 50E. This edition of NMX-J-XXX-ANCE supersedes the previous edition published on October 16, 2015. This edition of CSA C22.2 No. 94.2 supersedes the previous edition published in 2015. This edition of UL 50E supersedes the previous edition published on October 16, 2015.

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 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.

Scope

1.1

This standard applies to enclosures for electrical equipment intended to be installed and used in nonhazardous 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 Mexicos Electrical Installations, NOM-001-SEDE, as follows:

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

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

1.2

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.

1.3

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.

1.4

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.

This is the fourth edition of CSA C22.2 No. 30, Explosion-proof equipment. It supersedes previous editions published in 1986, 1984, and 1970. It is one of a series of Standards issued by CSA Group under Part II of the Canadian Electrical Code.

This edition includes requirements for sealing fittings to retain the sealing compound, requirements for the sealing compounds, and requirements for enclosures that involve explosive fluids.

For general information on the 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 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.

Scope

1.1

This Standard applies to explosion-proof electrical equipment suitable for use in hazardous locations in accordance with CSA C22.1, Canadian Electrical Code, Part I and the requirements of CSA M421. It applies to explosion-proof enclosures, parts of enclosures and other related equipment constructed of metallic and non-metallic materials.

1.2

Other Standards for hazardous location equipment covering specific types of equipment take precedence over this Standard.

1.3

The standard atmospheric conditions (relating to the explosion characteristics of the atmosphere) under which it may be assumed that equipment can be operated are

a) temperature –50 °C to +60 °C;

b) pressure 80 kPa to 110 kPa; and

c) air with normal oxygen content, typically 21% by volume.

Note: Although the standard atmospheric conditions above give a temperature range for the atmosphere of –50 °C to +60 °C, the normal ambient temperature range for the equipment is –50 °C to +40 °C, unless otherwise specified and marked.

1.4

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 (non-mandatory) to define their application.

Standard 94 is in the process of being phased out. All references to Spec 94 in other part 2 standards are being changed to the new harmonized documents. Once all references to Spec 94 have been updated, the standard will be withdrawn. Customers should be encouraged to use C22.2 No. 94.1 and C22.2 No. 94.2 for enclosure requirements and be advised that C22.2 No. 94 is being phased out.

Scope

1.1
This Standard applies to special purpose enclosures for electrical equipment intended to be installed and used in non-hazardous locations in accordance with the Rules of the Canadian Electrical Code, Part I, as follows:

(a) enclosures for indoor location, Types 2, 5, 12, 12K and 13; and
(b) enclosures for indoor or outdoor location, Types 3, 3R, 3S, 4, 4X, 6, and 6P.

1.2
This Standard applies to enclosures which provide a degree of protection to personnel against accidental contact with the enclosed equipment, and to the enclosed equipment, against specific environmental conditions.

1.3
This Standard supplements requirements for enclosures that are contained in individual CSA Part II Standards, where the application of the enclosures covered by this Standard are governed by the requirements of the applicable equipment Standard and Rules of the Canadian Electrical Code, Part I.

1.4
This Standard does not apply to enclosures intended for protection of equipment against conditions such as condensation, icing, corrosion, or contamination which may occur within the enclosure, or which may enter via conduit or unsealed openings.

1.5
This Standard does not apply to enclosures for motors and generators.

1.1
Cette norme s'applique aux enveloppes pour usage spécial destiné à l'appareillage électrique utilisé dans des emplacements non dangereux conformément au Code canadien de l'électricité, Première partie :
a) enveloppes pour emplacements à l'intérieur, de types 2, 5, 12, 12K et 13 ; et
b) enveloppes pour emplacements à l'intérieur ou à l'extérieur, de types 3, 3R, 3S, 4, 4X, 6 et 6P.

1.2
Cette norme s'applique aux enveloppes qui protègent raisonnablement les personnes contre tout contact accidentel avec l'appareillage qu'elles renferment, et aussi cet appareillage contre des conditions ambiantes particulières.

1.3
Les exigences de cette norme s'ajoutent à celles des normes de la Deuxième partie du CCE visant les enveloppes dans les cas où l'utilisation de l'enveloppe est régie par la norme d'appareillage pertinente et par le Code canadien de l'électricité, Première partie.

1.4
Cette norme ne s'applique pas aux enveloppes destinées à la protection d'un appareillage contre des conditions (condensation, formation de glace, corrosion, pollution, etc.) susceptibles de se manifester à l'intérieur de l'enveloppe, ou de s'introduire par un conduit ou par une ouverture non scellée.

1.5
Cette norme ne s'applique pas aux enveloppes de moteur ou de génératrice.