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Message: <blockquote data-quote="loopkiller" data-source="post: 5633798" data-attributes="member: 601690">The problem with circuit breakers are that each time they trip, they will begin to trip at a lower amount. Basically they degrade each time they pop. If it is rated for 200A and trips, next time it might trip at 198A, then 195A and so on. Fuses are used until they pop, then replaced. If you wire your stuff right, you won't have to replace a fuse unless something goes wrong. Unless the fuses are more expensive than the breakers, there is no reason not to use a fuse.The isolator you choose should be at least rated to the maximum output of your alternator. So if you have a 200A alternator, you would need at least a 200A isolator.</blockquote>

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