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Old 02-22-2014, 11:49 AM   #1
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Large Fuse

I have not had anything like this (panel to right of battery switches in attached) on my previous boats. I have breaker boxes as first in line with shore power system and I think this fuse box ? is next in line before charger. Does it require maintenance?
My boat is a 2004 Halvorsen 32GC.

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Old 02-22-2014, 12:36 PM   #2
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Do you have a 3 phase generator?
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Old 02-22-2014, 01:57 PM   #3
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I have a small Onan. Those are HRC fuses it looks like. I just assumed that they had to do with the shore power.
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Old 02-22-2014, 07:31 PM   #4
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All cables are supposed to be fused to protect the cable. Those are large probably so you can run start current through them.
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Old 02-22-2014, 07:50 PM   #5
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It's very curious. If you zoom into the image you can see they are rated for 300A which suggests they are for high power DC devices like a davit, thruster, inverter, etc. But the warning sticker says to turn off AC power. I think you'll need to trace the cables, or put volt meter on them and see what you get.
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Old 02-22-2014, 08:56 PM   #6
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Do you have a inverter?
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Old 02-23-2014, 09:35 AM   #7
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I do not have an inverter. I do have a bow thruster and a windlass.
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Old 02-23-2014, 08:22 PM   #8
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Quote:
Originally Posted by Bill Ranson View Post
I have not had anything like this (panel to right of battery switches in attached) on my previous boats. I have breaker boxes as first in line with shore power system and I think this fuse box ? is next in line before charger. Does it require maintenance?
My boat is a 2004 Halvorsen 32GC.

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Fuses do not require routine maintenance but you might want to carry spares or at least one spare if they are all the same value.

If you can't figure out what they protect, remove them one at a time and see what doesn't work. Make sure you disconnect the power first. If there is actually 120 (or 240) volts AC on these circuits, having a marine electrician determine what they are there for is probably the best plan.

High value fuses may protect the wiring to the bow thruster and windlass.
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Old 02-24-2014, 10:26 AM   #9
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Thanks to all for the feedback.
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