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Standard amendment
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IEEE C37.21a:2020
IEEE Standard for Control Switchboards--Amendment 1: Control and Secondary Circuits and Devices, and All Wiring
Summary
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.
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.
Notes
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Technical characteristics
| Publisher | Institute of Electrical and Electronics Engineers (IEEE) |
| Publication Date | 07/01/2020 |
| Edition | |
| Page Count | 16 |
| EAN | --- |
| ISBN | --- |
| Weight (in grams) | --- |
| Brochures |
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Amendments modifies
Previous versions
01/12/2005
Superseded
, Confirmed
Historical
29/03/1988
Superseded
, Confirmed
Historical