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Message: <blockquote data-quote="DidUHearThat?" data-source="post: 5525474" data-attributes="member: 594758">IMO, you should fuse to which ever is less, the load or the wire rating.  Minimum fuse size adds a safety margin to the system.  There is no point in having a 300A fuse if all your system will ever draw is 200 amps.  Even if the wire can handle 300A.  If you want a bigger fuse in the future, then buy new fuses.  They're cheap.Fuses protect the wire first, but they also provide protection for the system, the car and you.  It's an overall system design, balancing saftey and reliability not just a wire issue.The circuit breakers in your home are rated to protect the wire, but they also protect the outlets, the appliances, your home and you.</blockquote>

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