GB/T 11918.4-2025 Plugs, fixed or portable socket-outlets and appliance inlets for industrial purposes—Part 4:Switched socket-outlets with or without interlock
GB/T 11918.4-2025 Plugs, fixed or portable socket-outlets and appliance inlets for industrial purposes—Part 4:Switched socket-outlets with or without interlock
Basic Information
Scope
This document specifies the technical requirements for electric shock protection, interlocking, switches, and their components, structure, mechanical strength, and electrical performance of industrial sockets with or without interlocking belts.
This document applies to standalone products primarily intended for industrial use, for indoor or outdoor use, which combine the following components in a single housing:
—— A fixed or mobile socket that complies with GB/T 11918.1 or GB/T 11918.2 and has a rated working voltage of no more than 1,000 V DC or 1,000 V AC, a frequency of no more than 500 Hz, and a rated current of no more than 800 A;
—— A switching device.
The product may include an interlocking and/or protective device.
These electrical accessories are intended to be installed and used only by trained personnel or skilled technicians.