[MrForbes]

<R55> says also:

"In addition to the required branch power circuit breakers, smaller value fuses or breakers may be incorporated into custom circuits for additional protection. "

But it looks like they really do want us to run 18 AWG power wires, protected by a 20A breaker, to all of the sensors that need 12V power.

I wonder if you could make a custom circuit that feeds power to the sensors, with smaller wire protected by lower current fuses? ie. 22 AWG and 5A fuses.

Might be a suitable question for Q&A