The Stovebolt Site Forums The Shop Area The Electrical Bay fuseable link

I would like to fuse the hot wire from the battery to the cab. Does anyone know what would be the right amp fuse to use?

Thanks,
Mark P.

A 50 amp will probably do but it also depends on what accessories you have.

I'm running with a 20 amp Bus fuse. My intention was to switch to 30 amp if needed but it hasn't blown yet.

Are you running an alternator or a generator? The fuse link needs to be able to handle the highest battery charging current that's available from the charging system after startup, if you're running a standard wiring harness with the charging current going through the ammeter. I've seen short current surges of 80-100 amps from some alternators after a long cranking session. If you have a separate charging wire from the alternator to the battery, no problem, but the ammeter won't work right. Use a 50 amp fuse link, but be prepared to go bigger if it burns out from high alternator current.
Jerry

It's a 1967 C10 with a 250ci engine. The truck has an alternator, it's plain no power anything just a radio. Someone local said they thought it should have a 35 amp alternator but were not 100% sure. Does this sound right and if it is should I try a 30 amp or use a 50amp? Mechanical work I'm ok at but electrical systems not so much.

Thanks,
Mark

50 AMP min.

i run 5 relays to:: low beams x1, high beams x1, pusher fan x2, fog lights x1
all my relays have a fuseble link
http://s67.photobucket.com/albums/h298/1951otter/?action=view&current=0732700-R1-034-15A.jpg

I've never heard of an alternator with less than a 55 amp capacity. Most of the internal-regulated 10SI models are 65 to 100 amp capacity. If you choose to use a fusible link between the dash cluster and the ammeter, it should be able to carry at least most of the alternator's output. If there's a direct wire from the alternator output terminal to the top terminal of the starter, you could use a 40 or 50 amp fuse or fuse link to the ignition switch or other junction point to the inside accessories, and an idiot light instead of an ammeter to monitor charging system performance.
Jerry