Originally Posted by 450Donn
12VDC DOES NOT use breakers. There will be fuses and or relays
I 'm a 50 year master electrician. I'm pretty sure I know where breakers are used. My 12 volt statement was to inform the OP that his furnace was 12 volt and not 120 volt controlled by breakers.
To be technicaly correct there are in-fact 12 circuit breakers. My 56 Desoto had automatic reset breakers in the headlight circuit. They are also installed in our RV's as main battery breakers inline within 6' of the battery.