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Old 07-30-2012, 09:43 AM   #21
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Originally Posted by bglad View Post
Good point. Before you start make sure both poles on the DC motor are isolated from the case. The windlass case is supposed to be grounded and if the negative pole is not isolated from the case and you send positive to it you will make a dead short. If both poles are isolated from the case you will probably be OK.
Why is the windlass case supposed to be grounded?

Mine is not and the installation instructions say nothing about "grounding" the case. I don't remember any ABYC or other requirement to ground the windlass housing.

Of course if you have a metal boat, it would be grounded, but not on a typical fiberglass (or wooden) boat.
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Old 07-30-2012, 09:54 AM   #22
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That is the rule but I never find them done that way and in some special instance it might be important. Speaking in general terms the point of my post was to elaborate on one reason reversing polarity of the motor could cause a problem.
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Old 07-30-2012, 02:27 PM   #23
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On my motor, the case is the negative point.
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Old 07-30-2012, 05:11 PM   #24
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On my motor, the case is the negative point.
I'm not sure what post you're responding to, but a windlass that runs "both ways" does so by reversing the polarity to the motor. In the case of my Lewmar, if one power lead was connected to the windlass housing, it would be negative in one mode (up or down) and positive in the other.

I'm not at my boat (or even near it), but my money is on no electrical connection to the housing.
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