This part of IEC 61241 is applicable to electrical apparatus protected by enclosures and
surface temperature limitation for use in areas where combustible dust may be present in
quantities which could lead to a fire or explosion hazard. It specifies requirements for design,
construction and testing of electrical apparatus.
This standard supplements the general requirements in IEC 61241-0.
NOTE IEC 61241-14 gives guidance on the selection and installation of the apparatus. Apparatus within the
scope of this standard may also be subjected to additional requirements in other standards – for example,
IEC 60079-0.
The ignition protection is based on the limitation of the maximum surface temperature of the
enclosure and on other surfaces which could be in contact with dust and on the restriction of
dust ingress into the enclosure by the use of "dust-tight" or "dust-protected" enclosures.
The application of electrical apparatus in atmospheres which may contain explosive gas as
well as combustible dust, whether simultaneously or separately, requires additional protective
measures.
Where the apparatus has to meet other environmental conditions, for example, protection
against ingress of water and resistance to corrosion, additional methods of protection may be
necessary. The method used should not adversely affect the integrity of the enclosure.
This standard does not apply to dusts of explosives which do not require atmospheric oxygen
for combustion, or to pyrophoric substances.
This standard is not applicable to electrical apparatus intended for use in underground parts
of mines as well as those parts of surface installations of such mines endangered by firedamp
and/or combustible dust.
This standard does not take account of any risk due to an emission of flammable or toxic gas
from the dust.
2012BS EN 60079-0:2012 Explosive atmospheres. Equipment. General requirements
2009BS EN 60079-0:2009 Explosive atmospheres. Equipment. General requirements
2007BS EN 61241-0:2006 Electrical apparatus for use in the presence of combustible dust - Part 0: General requirements
1999BS EN 50281-1-1:1999 Electrical apparatus for use in the presence of combustible dust - Electrical apparatus protected by enclosures - Construction and testing