Institute of Electrical and Electronics Engineers (IEEE)
Latest
IEEE Std ANSI/IEEE C37.21-1985
Scope
Ratings, construction, and testing of dead-front control switchboards containing, but not limited to, devices such as switches, control devices, instrumentation, metering, monitoring, protective and auxiliary relays, and regulating devices and accessories are covered. Switchboards for the control and protection of apparatus used for or associated with power generation, conversion, transmission, an...