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I have an underdeck porch that has a ceiling made of metal roofing panels, that diverts deck drainage into a gutter. I would like to install recessed lighting in the ceiling. However, the cans will exposed to water from the deck drainage.

Is there a way to install a can light in such an environment?

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    I think you'd have to build and wire the whole thing as if there was no deck and you were just going to have it be outdoors. That means outdoor rated cable/conduit rated for wet locations. This is a serious project, that also means some seriously increased costs. It will mean sealed fixtures, and I doubt you'll find recessed. I've typically seen the common "jar style" fixtures for wet locations. – BrownRedHawk Jun 15 '16 at 15:34
  • @BrownRedHawk Recessed was the key here. I could do pendant lights easily with a waterproof electrical box. – David Pfeffer Jun 15 '16 at 21:51
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The cans themselves are not wet rated.

You should install a fixture that is. Such as a strip light that is sealed and gasketed. Something rated for outdoors.

Good luck!

  • No one makes a wet rated can? I also was considering epoxy sealing the cans themselves, since IC rated ones shouldn't need to breathe. – David Pfeffer Jun 15 '16 at 21:51
  • Usually serviceability and accessibility is a factor in electrical code. Enough epoxy to seal against water, would certainly make it less serviceable. – BrownRedHawk Jun 15 '16 at 21:56
  • There are many other design choices such as : lithonia.com/commercial/… and homedepot.com/p/… just google search for "wet rated" light fixtures. Can lights were never designed to be installed outdoors so using them in that way would present quite an engineering challenge. Just get fixtures that are designed for this purpose. – ArchonOSX Jun 16 '16 at 9:30

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