Funny how a few missing or unread words can cause misunderstandings.
I never used the word TMCC "signal" in my post.
But I used "downstream"
You are not supposed to tie a 12 gauge branch circuit into an existing 15 amp 14 gauge feeder.
You can off course run 12 gauge for a 15 amp circuit. A lot of electrician do it for their own homes. Disney requires 10 gauge in their theme parks even for lighting circuits.
But you would never run a circuit with wires larger than the mains coming into the house
Even if it was for a 220 50 amp circuit.
But even the ZW controller has output terminals that are not really designed to make a secure 12 gauge connection. Sure a ring or spade terminal will fit but it is not the equivalent of a securely bonded panel connection.
FMH
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