ISA 12.04.01 – Explosive atmospheres – Part 2: Equipment protection by pressurized enclosures "p" (IEC 60079-2 Mod)
This standard contains the specific requirements for the construction and testing of electrical apparatus with pressurized enclosures, of type of protection “p”, intended for use in hazardous (classified) locations defined as Class I, Zone 1 or Zone 2 by the National Electrical Code (NEC®), ANSI/NFPA 70. It specifies requirements for pressurized enclosures containing a limited release of a flammable substance
