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NEMA EN P1-2021
NEMA 250 Enclosure Types
The purpose of this document is to provide: (a.) General information on the definitions of NEMA enclosure types; (b.) A guide for comparing specific applications of enclosures: (c.) A comparison between NEMA enclosure type numbers and ANSI/IEC enclosure classification designations.The document is intended for use by architects, engineers, installers, inspectors, and other interested parties. For more detailed and complete information, please refer to ANSI/NEMA 250-2020 Enclosures for Electrical Equipment (1000 Volts Maximum).
NEMA: National Electrical Manufacturers Association [nema]