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Message: <blockquote data-quote="knukonceptz" data-source="post: 5225684" data-attributes="member: 548221">and to the subject of the 250A vs 300A fuse- if you are using less then 20' then a 300A fuse could be used. On a 250A load at 20' there is an average of a 10% loss due to resistance (standard acceptable loss in cable at max load) Its not so much a "fire" hazard, but a low voltage issue could harm your equipment if you draw 300A for extended time. We advise a 250A fuse to be safe.your 15' is a good examle - you have effectively reduced the cable's resistance by 25% (25% less material means 25% less resistance) so 300A would now be within standard allowable voltage loss</blockquote>

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