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I have a 220v line that runs to the end of a dock (it runs a boat lift). I would like to put a 110v light out there as well. Can I take one leg of the 220v and use it to run the 110v light? The boat lift and the light will not be on at the same time.

Thanks,
 

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Lic Electrical Inspector
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I have a 220v line that runs to the end of a dock (it runs a boat lift). I would like to put a 110v light out there as well. Can I take one leg of the 220v and use it to run the 110v light? The boat lift and the light will not be on at the same time.

Thanks,
The light needs a neutral (white wire).
 

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Semi-Pro Electro-Geek
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3,403 Posts
I have a 220v line that runs to the end of a dock (it runs a boat lift). I would like to put a 110v light out there as well. Can I take one leg of the 220v and use it to run the 110v light? The boat lift and the light will not be on at the same time.

Thanks,
You can only do this if it's a 4-wire circuit, i.e. there's a neutral wire present. Otherwise no. If there is no neutral, then you have two options for installing a light: either use a small transformer to step 240V down to 120 to run the light, or use a 240V light. If you use a fluorescent, metal halide, or sodium fixture, you can easily choose one with a 240V ballast. That's the simplest solution.
 

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Electrical Contractor
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I'd opt for a small control transformer for the light. Using an LED or CFL light would not need many watts, and something as small as a 40VA control transformer would be sufficient for such a light.
 

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" Euro " electrician
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I'd opt for a small control transformer for the light. Using an LED or CFL light would not need many watts, and something as small as a 40VA control transformer would be sufficient for such a light.
I was going to suggest that one as well but that work very well.

Merci,
Marc
 
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