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IEEE C37.20.2a-2020

IEEE Standard for Metal-Clad Switchgear--Amendment 1: Control and Secondary Circuits and Devices, and All Wiring

Amendment Standard - Active. This amendment addresses the requirements for control, secondary, and logic-level wiring. It covers wire type, ampacity, and methods for protecting wiring across a hinge.

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Institute of Electrical and Electronics Engineers [IEEE]


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As the voice of the U.S. standards and conformity assessment system, the American National Standards Institute (ANSI) empowers its members and constituents to strengthen the U.S. marketplace position in the global economy while helping to assure the safety and health of consumers and the protection of the environment.

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