Battery short circuit protection?
I've been working on a solar system and 2000w inverter install. Lots of wiring. Lots of heavy duty cables (inverter to batteries). I've also got a battery monitor set up which uses heavy duty cabli...
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x2 or whatever on the fuse size being determined by the wires you're using it to protect. A lead acid battery can produce a very high short circuit current, likely hundreds or thousands of amps.
Peak current when using the emergency start could be well over a hundred amps, if the wiring between the batteries is sufficiently low impedance. The current required for starting a generator is also somewhere in the vicinity of a hundred amps, very very roughly speaking. I think the main battery fuse in my class C might possibly be 125A, but my memory could also be wrong and it's not convenient to run out and check at the moment. Note that a fuse, since it responds to its insides heating up, can withstand a current above its rated current for a limited amount of time without blowing. How long that is depends on how much current is flowing, perhaps among other factors. Starting an engine is, or at least should be, a relatively brief draw.
Peak current when using the emergency start could be well over a hundred amps, if the wiring between the batteries is sufficiently low impedance. The current required for starting a generator is also somewhere in the vicinity of a hundred amps, very very roughly speaking. I think the main battery fuse in my class C might possibly be 125A, but my memory could also be wrong and it's not convenient to run out and check at the moment. Note that a fuse, since it responds to its insides heating up, can withstand a current above its rated current for a limited amount of time without blowing. How long that is depends on how much current is flowing, perhaps among other factors. Starting an engine is, or at least should be, a relatively brief draw.
