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IEEE C37.21-1985

Historical Revision

IEEE Standard for Control Switchboards

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New IEEE Standard - Superseded. 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, and distribution are included, but the standard is not limited to these. Industrial controls, communication equipment, switchboards for use on board ships, Class 1E switchboards for use in nuclear generating stations, and human factors are not considered.
This standard covers 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. It includes, but is not specifically limited to, switchboards for the control and protection of apparatus used for or associated with power generation, conversion, transmission, and distribution. It does not apply to 1) industrial controls, 2) communication equipment, 3) switchboards for use on board ship, 4) Class 1E switchboards for use in nuclear generating stations, nor 5) does it address human factor considerations.

SDO IEEE: Institute of Electrical and Electronics Engineers
Document Number C37.21
Publication Date March 29, 1988
Language en - English
Page Count 25
Revision Level
Supercedes
Committee Switchgear
Publish Date Document Id Type View
Dec. 1, 2005 C37.21-2005 Revision
March 29, 1988 C37.21-1985 Revision