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Old 08-12-2012, 11:51 PM   #16
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Pier Wiring Leaking


And I apologize if my post #9 seems harsh. I'm rarely like that. k_buz had just posted something in #8 that was kind-of harsh and I was responding to that. I'm sure he meant it as a wake-up call and it was received. However, he edited it out later (I don't blame you k-buz).

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Old 08-13-2012, 12:13 AM   #17
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You are correct, I did post something to try to make the danger as clear as possible, but I edited it after I reread one of your posts that stated you were not going to use the motor till you figure out what is wrong with it.
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Old 08-13-2012, 12:33 AM   #18
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Pier Wiring Leaking


I don't blame you man. I needed a wake-up call. The only reason I mentioned it is that my later posts seemed out of context and I just wanted to explain.
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Old 08-13-2012, 04:58 AM   #19
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Pier Wiring Leaking


Quote:
Originally Posted by gookinp07 View Post
I'm assuming that a dry motor has no reason to have a ground fault. It's only when a motor is wet or bad that a ground fault occurs? Is this correct?

Also, what made this motor bad? Did some of the internal wiring decay and cause a short? Can an old electric motor be rebuilt easily, or would it be bestto find a new one (if possible)?

Thanks for the replies.
1 - Motors dont have to be drippng wet,
just a humid enviroment can cause a small keakage,
enough to trip a gfci.

2 - It is not uncommon for some older type motors to have a leakage to ground,
this is usually caused by inductive coupling.
Its usually only a small leakage,
In the old days this was taken care of,
by just grounding the motor frame.
But now days gfci's get upset with these leakages.
Best to get rid of the motor !.

3 - Some motors are totally sealed for use in wet enviroments,
a good idea for your application .

Last edited by dmxtothemax; 08-13-2012 at 05:00 AM.
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Old 08-13-2012, 07:09 AM   #20
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Pier Wiring Leaking


Hello gookinp07, it is best to start fresh with this project and build it out as funds become availiable. I would start by bringing the hoist back into the house or workshop and do some research and testing before throwing it out.

1) Can it be converted to 120 volts and is your cable length short enough to support 120 volt operation.
2) If not, do the controls open both hot leads when not running or can it be modified to do so.
3) Does the motor have overcurrent protection built into it. (GFI/wire size selection)

Next step is to buy the proper size/voltage (returnable) GFI and test it with the hoist motor at your panel location. There are plenty of knowledgable folks here that will be happy to help you out with the details as long as the install is safe and follows code.
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Old 08-13-2012, 07:39 PM   #21
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Pier Wiring Leaking


So, I got around to more testing today and got some interesting results. I unplugged the winch from the socket. I ran a wire from the ground of the socket and rubbed it against the ladder in the water. It sparked. I measured 1.5 volts. I thought this was strange, so I cut off the breaker feeding the circuit. Same thing. I killed the main switch for the entire house. Same thing. There's always voltage going across the ground.

Later I tested the voltage going between the winch frame and the ladder while the motor was plugged in at rest and while it was running. It seemed to fluctuate a tiny bit, but remained at about 1.5 volts.
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Old 08-13-2012, 09:57 PM   #22
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Pier Wiring Leaking


Are you on a large lake with lots of docks?
The problem could be with a neighbors dock, or even the power company!

Keep everyone out of the water until the problem is resolved!
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Old 08-13-2012, 10:26 PM   #23
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Pier Wiring Leaking


Quote:
Originally Posted by jbfan View Post
Are you on a large lake with lots of docks?
The problem could be with a neighbors dock, or even the power company!

Keep everyone out of the water until the problem is resolved!
Will do.

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