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Released: 01.07.2020
IEEE C37.21a-2020
IEEE Standard for Control Switchboards--Amendment 1: Control and Secondary Circuits and Devices, and All Wiring
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English PDF
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70.45 USD
English PDF
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74.70 USD
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86.79 USD
| Standard number: | IEEE C37.21a-2020 |
| Released: | 01.07.2020 |
| ISBN: | 978-1-5044-6572-4 |
| Pages: | 16 |
| Status: | Active |
| Language: | English |
DESCRIPTION
IEEE C37.21a-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. This amendment will focus on sub clause 7.1.5, the wire used in switchboards.Amendment Standard - Superseded. 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.