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Old 05-16-2022, 07:21 PM   #1
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Windlass Fuse Size on Grand Banks 32

I have an 87 GB32. It has a (I believe) Lofrens horizontal windlass - smooth on left side and chain on right side Pulled out the fuse at the windlass and found it to be about 1/2 inch plus in diameter and 2.5 inches long. Does anyone happen to know what amperage this fuse is? I want to buy a spare and get the right one.
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Old 05-16-2022, 07:24 PM   #2
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Originally Posted by grandbanksbayfield View Post
I have an 87 GB32. It has a (I believe) Lofrens horizontal windlass - smooth on left side and chain on right side Pulled out the fuse at the windlass and found it to be about 1/2 inch plus in diameter and 2.5 inches long. Does anyone happen to know what amperage this fuse is? I want to buy a spare and get the right one.
You'll need to figure out the model of the windlass to determine the wattage. Divide by 12 to get amps.

That said, I'd bet a small amount of money that a 150 amp breaker is the right size.

Peter
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Old 05-16-2022, 07:34 PM   #3
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Is there any markings on the fuse?

150a sounds reasonable. I wouldn't go bigger than that without further research.
I have a Lofrens Tigress and use a 125a breaker.
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Old 05-16-2022, 07:44 PM   #4
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125 Sounds good

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Is there any markings on the fuse?

150a sounds reasonable. I wouldn't go bigger than that without further research.
I have a Lofrens Tigress and use a 125a breaker.


No markings on fuse, but that sounds okay. I do not want to melt down the system.
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Old 05-16-2022, 07:45 PM   #5
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Nope, nothing on the fuse. Just black and shiny.
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Old 05-16-2022, 07:54 PM   #6
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Grand Banks fuse

Does the fuse look like what can be seen in the photos below? If so, that is a shore power fuse. The photos are of a 1992 GB 32, we have had 3 other Grand Banks boats and they all had this exact fuse holder for the shore power (fore and aft) and all 4 have a breaker at the helm area for the windlass. I have in the past replaced those fuses as a precaution but I cannot remember the rating. I recall that it was printed on the side of the fuse. Good luck!
Regards,
Scott
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aft shorepower small.jpg   forward shorepower small.jpg  
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Old 05-17-2022, 09:11 PM   #7
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Perhaps check the cable size supplying the anchor winch. Shouldn’t the fuse protect the supply cable?
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Old 05-19-2022, 10:58 AM   #8
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Wow, what a range of answers.
I would start at the current rating of the piece of equipment that you are protecting, cable run included. I would not just replace what was there. We all know PO's that are not very technical and always go bigger with a fuse to "be safe". Safety is in protecting the circuit and your boat from a fire. What if the 3 PO's always went 5 amps higher each time they replaced a burnt fuse. ?
When a fuse blows, something went wrong and should be investigated.
I also would not rely on the cable size to establish the over current protection.
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Old 05-19-2022, 11:11 AM   #9
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Perhaps check the cable size supplying the anchor winch. Shouldn’t the fuse protect the supply cable?

Yes. It should be sized to protect the cable, although in some cases the cable will be oversized for the current draw to reduce voltage drop. In that case, size the fuse to protect the windlass motor, as it'll also be small enough to protect the cable.
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