IEEE C37.21-2026

Annotation of standard text IEEE C37.21-2026 :

Revision Standard - Active.

Ratings, construction, and testing of dead-front control switchboards containing, but not limited to, devices such as switches, control devices, instrumentation, metering, monitoring, alarms, annunciators, protective and auxiliary relays, and regulating devices and accessories are covered in this standard. Switchboards for the control and protection of apparatus used for or associated with power generation, conversion, transmission, and distribution are included, along with control, vertical, dead-front, enclosed, dual, and duplex switchboards. Other construction types, such as control desks, consoles, benchboards, dual and duplex benchboards, fixed rack, cabinet, and swing rack cabinets, are covered by this standard. Industrial controls, communication equipment, switchboards for use on board ships, or Class 1E switchboards for use in nuclear generating stations are not covered.

ISBN: 979-8-8557-3258-0, 979-8-8557-3814-8, 979-8-8557-3815-5

Number of Pages: 36

Product Code: STDUD28726, STD29077, STDPD29077

Keywords: benchboard, console, control desk, control switchboard, dead-front switchboard, dual benchboard, duplex benchboard, enclosed switchboard, fixed rack cabinet, IEEE C37.21, swing rack cabinet, vertical switchboard

Category: Switchgear

Draft Number: PC37.21/D15, Sept 2022 - UNAPPROVED DRAFT