"This standardspecifies requirements for the construction@ testing and marking for Group II electrical apparatus with type of protection@ ""n"" intended for use inClass I@ Zone 2 hazardous (classified) locations as defined by the National Electrical Code? (NEC?)@ ANSI/NFPA 70. Thisstandard is applicable to non-sparking electrical apparatus and also to electrical 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 gas atmosphere. This standard describes several different methods by which this can be achieved which may be combined with other methods described inANSI/ISA-60079-0. This standard supplements the general requirements in ANSI/ISA-60079-0. NOTE 1 A non-incendive component is limited in use to the particular circuit for which it has been shown to be nonignition capable and@ therefore@ cannot be separately assessed as complying with this standard. NOTE 2 Compliance with this standard does not imply any removal of@ or lowering of the requirements of any other standard with which the electrical apparatus complies. NOTE 3 This part supplements@ and may enhance@ the requirements for apparatus for normal industrial applications. Where compliance with other IEC standards is indicated@ such as IEC 60034 for motors and IEC 60598-2 for luminaires@ proving compliance to those standards is normally the responsibility of the manufacturer. NOTE 4 The National Electrical Code? (NFPA 70?) through the 2008 edition only recognizes types of protection ""nA""@ ""nC"" and ""nR"" and not ""nL"". See note in 35.1."
ISA 60079-15-2009 history
2013ISA 60079-15-2013 Explosive atmospheres - Part 15: Equipment protection by type of protection "n" (Edition 4; 12.12.02)
2009ISA 60079-15-2009 "Electrical Apparatus for Use in Class I@ Zone 2 Hazardous (Classified) Locations: Type of Protection ""n"" (12.12.02)"
2003ISA 60079-15-2003 "Electrical Apparatus for Use in Class I@ Zone 2 Hazardous (Classified) Locations - Type of Protection ""n"" (12.12.02; Second Printing: 07/15/2005)"