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IEEE C37.21a-2020
Current
Current
The latest, up-to-date edition.
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IEEE Standard for Control Switchboards--Amendment 1: Control and Secondary Circuits and Devices, and All Wiring
Available format(s)
Hardcopy , PDF
Language(s)
English
Published date
01-07-2020
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.
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