This standard covers enclosures for electrical equipment rated not more than 1000 Volts and intended to be installed and used as follows: a. Non-hazardous (non-classified) locations 1. Enclosures for indoor locations, Types 1, 2, 5, 12, 12K, and 13; and 2. Enclosures for indoor or outdoor locations, Types 3, 3X, 3R, 3RX, 3S, 3SX, 4, 4X, 6, and 6P. b. Hazardous (classified) locations 1. Enclosures for indoor locations, Types 7 and 9; 2. Enclosures for indoor or outdoor locations, Type 8; and 3. Enclosures for mining applications, Type 10.
ANSI/NEMA 250-2008 history
2024ANSI/NEMA 250-2020 Enclosures for Electrical Equipment (1,000 Volts Maximum)
2008ANSI/NEMA 250-2008 Enclosures for Electrical Equipment (1000 Volts Maximum)