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Old 02-24-2016, 11:16 AM   #21
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When did fuses become the only suitable circuit interruption for wiring?

If so most houses are in BIG trouble.
On a thruster, the last thing you need to worry about is finding a replacement fuse and wrenches to swap it out, since most likely, it failed when you are bow to a 2 million megayacht and were using the thruster to navigate around the big boat. So, a breaker, that can be reset fairly quickly is not a terrible idea.
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Old 02-24-2016, 11:37 AM   #22
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Eaton makes a line of DC circuit breakers (with some stand-alone breakers too) that go up to about 300 amps. Here is a vendor with some of them.

EATON Hi-Amp Marine Circuit Breakers - Panel Mount
I do see a 200 amp but nothing higher, even on the Eaton website. There are cheap Chinese 300A for car stereos. No way I would trust one.
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Old 02-24-2016, 04:16 PM   #23
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It's interesting to speculate as to why this happened, but time is better spent making sure it won't happen again. Check to see that the cable is the correct size for the load and check to see that the overcurrent protection is the correct value for the cable. Check to see that all connections are clean and tight and that cable ends are terminated properly.
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Old 02-25-2016, 07:39 AM   #24
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"So, a breaker, that can be reset fairly quickly is not a terrible idea."

A breaker can ONLY be reset after it cools down.

Its sked , not yours!
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Old 02-25-2016, 08:12 AM   #25
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What type/brand circuit breakers handle 200+ amps DC? Normal searches turn up zip. My boat has a 300A fuse for the thruster.
Marine DC Breaker 200 amp
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Old 02-25-2016, 11:04 AM   #26
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http://www.amazon.com/300-Circuit-Br.../dp/B007AUPY6I
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Old 02-25-2016, 11:31 AM   #27
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see post #22.... Archie made it pretty clear on druthers....
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