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IEEE C37.21a-2020

IEEE Standard for Control Switchboards

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IEEE C37.21a-2020

IEEE Standard for Control Switchboards

PUBLISH DATE 2020

PAGES 16

IEEE C37.21a-2020

Document Information

Amendment Standard - Active. 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.

Align the wiring requirements of this standard with; IEEE C37.20.1, IEEE C37.20.2, IEEE C37.20.3, and IEEE C37.20.9. This amendment will focus on sub clause 7.1.5, the wire used in switchboards.


SDO	IEEE: Institute of Electrical and Electronics Engineers
Document Number	C37.21
Publication Date	July 1, 2020
Language	en - English
Page Count	16
Revision Level	a
Supercedes
Committee	Switchgear

Publish Date	Document Id	Type
May 23, 2017	C37.21-2017	Revision
Dec. 8, 2010	C37.21-2005	Revision
June 25, 1998	C37.21-1985	Revision

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IEEE C37.21a-2020

IEEE Standard for Control Switchboards

IEEE C37.21a-2020

Document Information

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