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Feb 22, 2021 at 13:00 comment added Ed Beal No clamp is required when conduit is used box to box.
Feb 22, 2021 at 4:11 comment added ZakiMa With conduit the whole way to a box - does it still require some clamp at the box?
Feb 22, 2021 at 4:10 vote accept ZakiMa
Feb 21, 2021 at 17:08 comment added Ed Beal Yes you can attach the box directly to the siding. When I do this I seat the top and sides not the bottom so if by chance some water gets behind the box it will drain and not end up inside the wall. To answer the above comment about THHN, almost all THHN has been dual rated for ~20 years some main US brands going back much further the dual rating today is usually THWN-2 , +additional types but the THWN provides the wet location protection when going outside similar to UF. The difference is the THWN requires conduit the whole way box to box where UF only requires a bushing or clamp at the box
Feb 21, 2021 at 5:43 comment added ZakiMa Re: exterior siding. It looks and feels like wood shingle siding. So, would it be fine just to attach to it?
Feb 20, 2021 at 20:01 comment added ZakiMa Thank you for pointing to a NEC article about switches.
Feb 20, 2021 at 19:57 comment added ZakiMa What is the example of 2 screw clamp? Something like this? homedepot.com/p/…. Is it allowed to use it for non-metal boxes?
Feb 20, 2021 at 17:48 history answered Ed Beal CC BY-SA 4.0