More windlass fun & games - SailNet Community
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post #1 of 7 Old 04-06-2018 Thread Starter
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More windlass fun & games

In which I have figured out how to mount the windlass (Lewmar V2) but now need to work out the wiring. It came with a 90A breaker. There is no good place within about 7' of the battery to mount it, however. My understanding is that the line should also be fused as near the battery as possible.

The easiest thing is to use one of the Blue Sea battery post fuse blocks. So, what amperage should the fuse be? I assume considerably higher than the 90A of the breaker (which will be downstream from the fuse). Nothing else will be on that circuit besides the windlass. Am I correct to assume that the circuit may well see momentary loads higher than 90A, and the Lewmar breaker is designed as a slow-blow so it doesnt trip when this happens?

Thanks
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post #2 of 7 Old 04-06-2018
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Re: More windlass fun & games

My Maxwell VWC100 uses a 150amp ANL fuse.

Power comes from start bank which is 30 feet from windlass. Fuse is located 2' from battery

Cable is 2/0 x 30'

pay attention... someone's life depends on it
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post #3 of 7 Old 04-06-2018
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Re: More windlass fun & games

I don't understand - you have room for a fuse, but not a breaker? Even if so, just put a 90A fuse in the windlass wire close to the battery. The breaker is designed to handle higher transients, but you can get fuses that do so also.

If the breaker is some big honker (Maxwell has had some of these in the past), then you can replace it with any other smaller 90A breaker like ones from Blue Seas.

If you need to have easy access to the breaker to also use it as a switch, then either a fuse at the battery like above or an actual switch in a convenient place are solutions.

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Re: More windlass fun & games

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Originally Posted by colemj View Post
I don't understand - you have room for a fuse, but not a breaker? Even if so, just put a 90A fuse in the windlass wire close to the battery. The breaker is designed to handle higher transients, but you can get fuses that do so also.

If the breaker is some big honker (Maxwell has had some of these in the past), then you can replace it with any other smaller 90A breaker like ones from Blue Seas.

If you need to have easy access to the breaker to also use it as a switch, then either a fuse at the battery like above or an actual switch in a convenient place are solutions.

Mark
It's not that I don't have room for the breaker. But putting it close to the battery would require that the breaker be mounted on the front panel (near the cabin sole) of the settee that the batteries are under, which seems like a bad place as it would be vulnerable to kicking etc. The only really accessible places on the wall are some distance away.

And I have always seen the windlass breaker left off when the windlass is not in use, which is what I plan to do. So it does need to be accessible. Sounds like you think a 90A slow-blow fuse would be OK?

Thanks.
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post #5 of 7 Old 04-06-2018
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Re: More windlass fun & games

My only concern with a fuse is that it is a pain to change when it blows, and windlasses have a tendency to trip their breakers if they stall (anchor caught, etc). Maybe consider a breaker at the battery and a switch in a convenient place? If mounting the breaker is the issue, just mount it in a project box or similar and secure it somewhere you can get to it if needed.

Mark
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post #6 of 7 Old 04-06-2018
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Re: More windlass fun & games

Think its a safety thing to have a switch where you can turn off/on the power to the bow thruster and the windlass easily from inside the boat without having to move anything. We have ours (and electric winches) mounted on panel below the starboard settee. Even doing my best have had occasion where we flooded the most forward compartment in front of the watertight bulkhead. It would have been a horror show if it went off or shorted. Wouldnt hear it or see it when being covered in green water. Also have a sub panel in the cockpit to turn power on/off as well. What ever you do think of accessibility.

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post #7 of 7 Old 04-06-2018
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Re: More windlass fun & games

The type of breaker/switch that came with my Lewmar winches is quite flat. I routered out the outline for the switch then set it in. It is basically flat against the surface of the bulkhead that it is mounted on. Whould this be a solution for you? If mounted under the seat, it would be easy to get to if you needed it, but very unobtrusive. Or reset it even further and cover it with a clear plastic panel (flush to the front of the settee) which you could open to get to the switch.
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