Active Standard

IEEE C37.21a-2020

IEEE Standard for Control Switchboards--Amendment 1: Control and Secondary Circuits and Devices, and All Wiring

Requirements for control, secondary, and logic-level wiring are addressed in this amendment. It covers wire type, ampacity, and methods for protecting wiring across a hinge.

Sponsor Committee
PE/SWG - Switchgear
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Status
Active Standard
PAR Approval
2019-02-08
Board Approval
2020-03-05
History
Published:
2020-07-01

Working Group Details

Society
IEEE Power and Energy Society
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Sponsor Committee
PE/SWG - Switchgear
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Working Group
SASC-WG_C37.21 - SASC - IEEE Standard for Control Switchboards
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IEEE Program Manager
Ashley Moran
Contact
Working Group Chair
Dan Hrncir
No Active Projects

C37.21-2017

IEEE Standard for Control Switchboards

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. 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. Types of switchboards may include control, vertical, dead-front, enclosed, dual, or duplex switchboards. Other construction types include control desks, consoles, benchboards, dual or duplex benchboards, fixed rack, cabinet, and swing rack cabinets. It does not apply to industrial controls, communication equipment, switchboards for use on board ships, or Class 1E switchboards for use in nuclear generating stations.

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C37.21-2005

IEEE Standard for Control Switchboards

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, alarms, annunciators, 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. Types of switchboards may include control, vertical, dead-front, enclosed, dual, or duplex switchboards. Other construction types include control desks, consoles, benchboards, dual or duplex benchboards, fixed rack, cabinet, and swing rack cabinets. It does not apply to industrial controls, communication equipment, switchboards for use on board ships, or Class 1E switchboards for use in nuclear generating stations.

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No Inactive-Withdrawn Standards
No Inactive-Reserved Standards
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