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Electrical apparatus for explosive gas atmospheres - Part 15 Type of protection “n”

Long abstract

This European Standard specifies requirements for the construction, testing and marking for Group II electrical apparatus with type of protection “n”, intended for use only in areas where explosive atmospheres of gas, vapour and mist are unlikely to occur or if they do occur, are likely to do so infrequently or for a short period only.

This standard is applicable to non-sparking electrical apparatus and also to apparatus with parts or circuits producing arcs or sparks or having hot surfaces which, if not protected in one of the ways specified in this standard, could be capable of igniting a surrounding explosive atmosphere.

This standard is also applicable to electrical equipment and components of Group II, Category 3G.

Short abstract

Requirements for construction, testing and marking of electrical apparatus with type of protection “n”.

History and related standards

This European Standard supersedes BS EN 50021:1999 which is withdrawn. It also partially supersedes DD ENV 50269:1997 which is also withdrawn.

This standard includes the following cross references:

IEC 60034 (all parts), IEC 60034-1:1996, IEC 60034-5, IEC 60050-411, IEC 60050(426), IEC 60050(486), IEC 60060 (all parts), IEC 60061 (all parts), IEC 60068-2-27:1987, IEC 60079-0:1998, IEC 60079-2, IEC 60079-11, IEC 60081, IEC 60112, IEC 60155, IEC 60216-1:1990, IEC 60216-2, IEC 60238:1998, IEC 60269-3, IEC 60400, IEC 60529:1989, IEC 60598-1:1996, IEC 60598-2 (all parts), IEC 60662:1992, IEC 60664-1, IEC 60920, IEC 60922, IEC 60924, IEC 60926: 1995, IEC 60927, 1996, IEC 60928: 1995, IEC 60998-2-4: 1991, IEC 61048, IEC 61049, IEC 61184.

BS EN 60079-14:2003 provides specifications to reduce the likelihood of explosion from electrical apparatus installed in areas where dangerous concentrations and quantities of flammable gases, vapours, mists, ignitable fibres or dusts that may be present in the atmosphere.

Contents include information on:

selection of electrical apparatus
additional requirements for the installation of:
- type of protection ‘d’ flameproof enclosures
- type of protection ‘e’ increased safety
- type of protection ‘i’ intrinsic safety
- type of protection ‘p’ pressurized apparatus
additional requirements for apparatus suitable only for use in zone 2.

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