Based on the 2023 NEC.
Question: True or false? The insulating bushing required to protect #4 or larger conductors in a raceway can be installed after the conductors are installed in the raceway to prevent damage to the bushing.
See answer below.
Explanation: A revision to Sec. 300.4(G) makes it clear that one of the methods listed in Sec. 300.4(G) (1 - 4) must be in place before the conductors are installed.
Lupacchino is a senior design engineer with Gaylor Electric, Inc. in Noblesville, Ind. and serves as an alternate on NEC Code-Making Panel No. 3. He is currently licensed in more than 80 jurisdictions. He can be reached at [email protected]