IEEE C37.21a-2020
Withdrawn
Withdrawn
IEEE Standard for Control Switchboards--Amendment 1: Control and Secondary Circuits and Devices, and All Wiring
Published date
07-01-2020
Withdrawn date
02-28-2026
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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.
| Committee |
Switchgear
|
| DocumentType |
Standard
|
| PublisherName |
Institute of Electrical & Electronics Engineers
|
| Status |
Withdrawn
|
| IEEE C37.30.6-2023 | IEEE Guide for Electric Motor Operators Applied to High‐Voltage Air Switches Rated Above 1000 V |
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