ANSI/ISA 12.16.01-2002
This part of IEC 60079ANSI/ISA-12.16.01-2002 (IEC 60079-7 Mod) specifies the requirements for thedesign, construction, testing and marking of electrical apparatus with type of protection increased safetye intended for use in Class I, Zone 1, Groups IIA, IIB, and IIC hazardous (classified) locationsexplosivegas atmospheres. This standard applies to electrical apparatus with a rated value of supply voltage notexceeding 11 kV r.m.s. a.c. or d.c. Additional measures are applied to ensure that the apparatus does notproduce arcs, sparks, or excessive temperatures in normal operation or under specified abnormalconditions.
These specific requirements are additional to the general requirements in ANSI/ISA?12.00.01-2002 (IEC60079-0 Mod)IEC 60079-0 that apply to type of protection increased safety e unless specificallyexcluded.