Electrical

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 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 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.

1DV DR Modification of Clause 1 to replace with the following:

This part of IEC 60079 standard specifies the construction and testing of intrinsically safe apparatus intended for use in explosive atmospheres, and for associated apparatus which is intended for connection to intrinsically safe circuits which enter such atmospheres.

This Type of Protection is applicable to electrical equipment in which the electrical circuits themselves are incapable of causing ignition of a surrounding explosive atmosphere. This includes electrical equipment which contains circuits that are intrinsically safe only under certain conditions, for example under battery supply with mains supply removed.

This document is also applicable to electrical equipment or parts of electrical equipment located outside the explosive atmosphere or protected by another Type of Protection listed in IEC 60079-0 UL 60079-0 and CSA C22.2 No. 60079-0, where the intrinsic safety of the electrical circuits in the explosive atmosphere may depend upon the design and construction of such electrical equipment or parts of such electrical equipment. The electrical circuits exposed to the explosive atmosphere are assessed for use in such atmospheres by applying this document.

This document applies to sensors connected to intrinsically safe circuits but does not apply to the protection of catalytic elements for Group IIC or Group IIB + H2.

This document does not apply to Ex Equipment cable glands.

The requirements for intrinsically safe systems are provided in IEC 60079-25 UL 60079-25 and CSA C22.2 No. 60079-25.

This document supplements and modifies the general requirements of IEC 60079-0, UL 60079-0 and CSA C22.2 No. 60079-0 except as indicated in Table 1. Where a requirement of this document conflicts with a requirement of IEC 60079-0 UL 60079-0 and CSA C22.2 No. 60079-0, the requirement of this document takes precedence.

Unless otherwise stated, the requirements in this document are applicable to both intrinsically safe apparatus and associated apparatus, and the generic term "apparatus" is used throughout the standard.

As this document applies only to electrical equipment, the term "equipment" used in the standard always means "electrical equipment".

This document applies to apparatus for use under the atmospheric conditions of IEC 60079-0 UL 60079-0 and CSA C22.2 No. 60079-0 with additional requirements for use at extended atmospheric pressures in the range from 60 kPa (0,6 bar), up to 110 kPa (1,1 bar).

Where references are made to other IEC standards, the referenced requirements found in these standards apply as modified by any applicable US National Differences for the standard (see Clause 2).

This International Standard deals with the safety of electric room heaters for household and similar purposes, their rated

voltage being not more than 250 V for single-phase appliances and 480 V for other appliances.

NOTE 101 Examples of appliances that are within the scope of this standard are

- convector heaters;
- fan heaters;
- heaters for use in greenhouses;

- liquid-filled radiators;
- panel heaters;
- radiant heaters;
- tubular heaters;
- ceiling mounted heat lamp appliances.

For extraction fans of ceiling mounted heat lamp appliances, IEC 60335- 2-80 is applicable as far as is reasonable.

Appliances not intended for normal household use but which nevertheless may be a source of danger to the public, such as

appliances intended to be used by laymen in the shops, in light industry and on farms, are within the scope of this standard.

As far as is practicable, this standard deals with the common hazards presented by appliances which are encountered by all persons in and around the home. However, in general, it does not take into account

- persons (including children) whose
* physical, sensory or mental capabilities; or
* lack of experience and knowledge prevents them from using the appliance safely without supervision or instruction;
- children playing with the appliance.

NOTE 102 Attention is drawn to the fact that

- for appliances intended to be used in vehicles or on board ships or aircraft, additional requirements may be necessary;
- in many countries, additional requirements are specified by the national health authorities, the national authorities responsible for the protection of labour and similar authorities;
- for appliances intended to be used in the presence of combustible dust, for example in barns or stables, additional requirements may be necessary.

NOTE 103 This standard does not apply to

- appliances intended exclusively for industrial purposes;
- appliances intended to be used where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas);
- heaters that are built into air conditioners (IEC 60335-2-40);
- clothes dryers and towel rails (IEC 60335-2-43);
- heaters for saunas (IEC 60335-2-53);
- thermal-storage room heaters (IEC 60335-2-61);
- heating appliances for breeding and rearing animals (IEC 60335-2-71);
- foot warmers and heating mats (IEC 60335-2-81);
- flexible sheet heating elements for room heating (IEC 60335-2-96);
- heated carpets;
- central heating systems;
- heating cables (IEC 60800).

1.1
This Standard applies to requirements for solid-state circuit breakers (SSCB) and solid-state hybrid circuit breakers (SSHCB) utilizing semiconductor switching technology intended for applications where overcurrent protection complies with CSA C22.1, the Canadian Electrical Code, Part I.

1.2
This Standard applies to:

Solid-state circuit breakers (SSCB) and switches (SSCS) with air gap isolation; and
Solid-state hybrid circuit breakers and (SSHCB) switches (SSHCS)

1.3
This Standard applies to both single and multi-pole devices with ratings up to 1000Vac and 1500Vdc.

1.4
The general requirements for molded-case circuit breakers, molded-case switches and circuit-breaker enclosures are contained in CSA C22.2 No. 5. This Standard additionally applies to the construction and performance requirements for Solid-State Circuit Breakers and Solid-State Switches. 

1.5
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.

1.1       This Standard applies to rotating electrical machines for installation and use in accordance with CSA C22.1, Canadian Electrical Code Part 1; NFPA 70, National Electrical Code; and NOM-001-SEDE, Standard for Electrical Installations.

1.2       For the purposes of this Standard, the term "machine" is representative of and equivalent to the terms rotating electrical machine and rotating machine and is understood to mean all manner of electric motors and generators covered by the scope of this Standard. The term "machine" is also understood to apply to both AC and DC machines rated up to and including 34 kV and including but not limited to NEMA and IEC machines.

1.3       Machines intended for use in hazardous locations as defined in the CSA C22.1, Canadian Electrical Code Part 1; NFPA 70, National Electrical Code; and NOM-001-SEDE, Standard for Electrical Installations, may have additional requirements to be met as specified in the CSA C22.1, Canadian Electrical Code Part 1; NFPA 70 National Electrical Code; and NOM-001-SEDE, Standard for Electrical Installations.

1.4       These requirements cover electric generators, also referred to as alternators, and including those for standby use, rated 34 kV or less and when coupled with prime movers, such as engines or electric motors, are used to produce electricity.

1.5       These requirements cover squirrel cage polyphase induction motors intended for use with variable voltage and variable frequency controls, commonly referred to as inverters. The requirements in this Standard are intended to evaluate the suitability of the motor for normal use when fed from an inverter supply through a manufacturer declared range of operating conditions.

1.6       These requirements cover field-installed machines with form wound windings and rated for applications between 460 V and up to 34 kV.

1.7       These requirements also cover field-installed machines employing random wound windings and rated for applications above 1,000 V and up to 7,200 V.

1.8       These requirements do not cover:

a)         Overheating protection for motors;
b)         Machine protection that is dependent upon requirements for the end-use equipment in which the machine shall be installed;

c)         Sealed (hermetic type) motor-compressor parts;
d)         Electric machines for use in aircraft, marine service installations, drives for land transportation equipment, or machines used in underground mining;
e)         Stationary or portable generator assemblies, which are respectively covered under UL/ULC 2200, UL 2201, and CSA C22.2 No. 100.1;
f)          Sealed (hermetic type) motor-compressor parts, which are evaluated under UL 60335-2-34; or
g)         Special generators (such as hydrogen cooled (turbo) generators) rated 10 MVA and above which are covered under IEEE C50.12; IEEE C50.13; or IEC 60034-3.

1.9      This Standard does not address:

a)         The efficacy of motor overtemperature protection under abnormal conditions;
b)         The operation of a motor under unusual service conditions as described in NEMA MG-1; nor
c)         The operation of a motor in hazardous (Classified) locations for inverter duty motors.

1.10     This Standard provides basic requirements for machines and does not exclude any additional requirements given in any other standards referenced.

1.11   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.

1.12     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.

1.13     Notes to tables and figures are considered part of the table or figure and may be written as requirements.