Historical
ANSI/ISA-60079-15 (12.12.02)-2003
Electrical Apparatus for Use in Class I, Zone 2 Hazardous (Classified) Locations - Type of Protection "n"
This report specifies requirements for the construction, assessment and testing of electrical apparatus with type of protection "n" which, when operating normally within its rated duty, is unlikely to be capable of igniting a surrounding explosive gas atmosphere. This report specifies the features of apparatus which shall be assessed to achieve a satisfactory level of safety for electrical apparatus for use in Zone 2. This report applies only to Group II electrical apparatus intended for use in locations with explosive gas atmospheres other than in mines subject to firedamp.
The International Society of Automation [isa]