Originally Posted by pick1e
I need to replace the box holding the flood lights on the side of my house. It's not under an eave and directly exposed to the sun and rain.
The box that is there now is a standard blue Carlon box inset so it is about flush with the vinyl siding. It's screwed into a wood support behind the sheathing. I guess this is OK as far as code but doesn't seem like a great idea- it's all brittle from the exposure, hence why I'm replacing it.
I was thinking I should put a cast metal weatherproof box there and then caulk the seam between the box and the siding, but then I'm concerned about the siding moving around with expansion and contraction and water going in anyway.
Is there a better way? Or should I just do that and check the caulk when I replace bulbs?
Also, so that I don't have to make the existing hole bigger, can I just cut off the surface-mount screw lugs on the outer edge of the box (to make it round) and drill through the back to screw it into the existing support? I just wasn't sure if modifying the box was a no-no.
Yes, I would definitely use a metal box on the outside of buildings. And yes, after the fixture is installed again, it's a good practice to caulk and seal the around the fixture where it meets the siding. (Your siding should not be expanding and contracting under any conditions, so that shouldn't be a problem)
As for the box itself, you can buy an octagon box without a side mount, so that you don't have to make any modifications. But if that's all you have, go ahead and give it a try, just don't damage the interior of the box or create any sharp areas that may damage the wires.