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Windlass Wiring Question
Wire size is a function of amp load and distance. The #10 leads on the
windlass are only about 2' long so they can carry 50 amps with a voltage drop of only 2%. With 50 amps on a 72' run #4 is the absolute minimum size you should use. Even then including the windlass leads you will be close to 10% voltage drop. Using #8 you would loose more than 20%. How are you routing the wire to use up 72' on a 27' boat? -- Glenn Ashmore I'm building a 45' cutter in strip/composite. Watch my progress (or lack there of) at: http://www.rutuonline.com Shameless Commercial Division: http://www.spade-anchor-us.com "Don Mahony" wrote in message ... I am installing a Lewmar Horizon 600/900 horizontal windlass on a 27 foot power boat. The users manual says to use #4 AWG marine grade wire from the battery to the solenoid to the breaker to the windlass and back to the battery. The wire leads on the windlass are #10 AWG. I know the concern here is with voltage drop to the motor but the cost of the #4 wire is huge. Rather than following the general guidlines in the manual does anyone have a better way of calculating exactly what gauge wire would be needed for this installation? The total run from the battery to the windlass and return is 72 feet. Don |
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