IEEE PC37.21a/D3, June 2019
IEEE Draft Standard for Control Switchboards Amendment 1: Control and Secondary Circuits and Devices, and All Wiring

Standard No.

IEEE PC37.21a/D3, June 2019

Release Date

2019

Published By

Institute of Electrical and Electronics Engineers (IEEE)

Scope

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.