Figure 4 shows the back side of a typical panel board supplying dc circuits on an average boat.
Boat circuit breaker vs fuse.
The fuse or breaker is sized to protect the wiring.
For example if your trolling motor draws a maximum current of 60 amperes then you can install a 60 amp circuit breaker for trolling motors.
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Circuit breaker or fuse block agree with silvertip.
Had not installed the breaker yet just tied the pos and neg to battery to test things well when i disconnected something the wires met i started smelling smoke turn around and i had melted the main harness.
All the fuses are 5 amp except the circuit that supplies the fish finder 3.
Fuse rule of thumb.
The different types of circuit breakers.
A fuse or circuit breaker is primarily there to protect wirng which will with sufficient current incandesce glow red and be a real fire danger.
If a set load is on it fish finder for instance it can be downsized to protect the device itself.
This particular boatbuilder opted for the use of thermal mini breakers popular on european boats for a few years now.
Now the fuse is a small piece of wire put into a safe container which will fuse melt at a lower current than that which will make the wiring a fire danger.
Focus on the circuit breaker or fuse and associated wires that are supplying the circuit you re have trouble with.
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