Is it within the NEC to wire ceiling light fixtures with 14ga NM from a switch wired with 12ga NM, where the power originates at the switch and the ceiling fixture is a branch?
The breaker protecting the circuit is 20 amp.
Electrical – Does the NEC allow a 14ga branch on a 12ga circuit
electricalwiring
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Best Answer
Absolutely not. If the branch circuit is 20A then ALL the wiring on the circuit must be at least #12cu.
Yes, there are convoluted tap rules but they would not apply in this installation and IMO are not even worth mentioning.