30 Amp fuse voltage.
- Thread starter The Master Cylinder
- Start date
The Master Cylinder
Well-known member
They have circuit breakers that fit in the glass fuse holder on Amazon.com
https://www.eaton.com/us/en-us/skuPage.CBF-30.html
Available through Rock Auto, along with other amperages.
Wire gauge size has certain ampacities. These are given for certain temperatures and lengths of wire. 30 Amps is most likely too high for the size wire that most Model A's have. If you're blowing 30 amp fuses, there's something wrong, or you should separate systems and have more than one fuse.
Available through Rock Auto, along with other amperages.
Wire gauge size has certain ampacities. These are given for certain temperatures and lengths of wire. 30 Amps is most likely too high for the size wire that most Model A's have. If you're blowing 30 amp fuses, there's something wrong, or you should separate systems and have more than one fuse.
Y-Blockhead
Well-known member
Odd, discribtion says 30amp but the picture is a 10amp. Ensure you put this type of circuit breaker in the correct way, one post is marked "BAT". Not sure how they work in a positive ground system.
This type of breaker is automatically resetting once it’s removed from the circuit and cooled down. The only way you can tell if it’s tripped is by feeling it - it’s hot! We had one of these go on a car on a tour last week, the only way we could tell if it was gone was by feeling (confirmed by multimeter). (Finally traced the fault to the headlight circuit, so he just ran daytime only.) Mine has a push button, manually resetting, so I can see at a glance that it’s been tripped. Don’t know where those are available, I really like it.
BTW, the fuse holder jaws have a habit of opening up, you need to squeeze them shut periodically to keep good contact.
The nes I’ve seen seem to work fine on positive ground.