ISA 60079-15 (12.12.02) – Explosive Atmospheres – Part 15: Equipment protection by type of protection "n" (Edition 4)
This standard specifies requirements for the construction, testing and marking for Group II electrical equipment with type of protection “n” intended for use in explosive gas atmospheres. This standard applies to electrical equipment where the rated voltage does not exceed 15 kV r.m.s. a.c. or d.c.
