The Stovebolt Site Forums The Shop Area The Electrical Bay Fuse block size and how to calculate circuits

I am wondering how I should calculate the number of circuits my bus will need. I want to replace the old fuse panel in the engine bay with a modern fuse block, but don't know how many circuits I should get. So how do I calculate how many circuits to get?

I would set down with a pc. of paper and wright down whats in the truck.

1- ign sys.
2- head lites
3- tail lites and turn sig.
4- heater or heaters (bus)

etc.

Thats a good start from there you can figure out the fuse size

1- 10 amp
2- 20 amp
3- 15 amp
4- ? don't know what kind of heater is in a bus

Try and keep the sys. seperate

Pete

I think a big criteria is
"if fuse X blows how much stuff stops running"

I admit I tend to put too many fuses in but when the radio blows a fuse the taillights still stay on and the cop never even notices.

At minimum I would have a fuse for each of
these loads
headlights
park lights turn brake lites
Ran out of space nuts to this

Dan Bentler

have rarely used more than 16 circuits, the fuse panels I buy have 16circuits generally consisting off
6 x batery circuit brakes, horn, interior light, radio memory etc
6 x ignition cicuits gauges, indicators, wipers thermo fan fuel pump etc some of these you may not need
2 accessory circuits heater and radio
2 spare slots to carry spare fuses
headlights should be fed from the battery cable via a circuit breaker i.e not fused

How do I know what amp fuse to use for each component, i.e. head lights, horn, etc?