I'm fitting some new bilge pumps and plan to use a blue seas fuse block which is rated to 100amp. There'll be two pumps which draw 8.4 and one that draws 2.7 and all the pumps will have seperate fuses. My plan is to conect this directly to the battery so there is always power to the pumps as the boat is moored and I need to fit a master switch/circuit breaker how do I size this?
The safest way to size a master circuit breaker is bassed on the current carrying capacity of the wire down stream of it.........
so if you are going away from your breaker in say 6mm automotive (4.5mm2 ish)... rated at 50 amps ish... a 30 or 40 amp breaker would be safe.....anything beyond the fuse panel will be protected by the fuses in that pannel.
cheers
Its the details, those little details, that make the difference.
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