Running Wires Through A Roof

The actual install of recessed lights here https youtu be 5yc8aqnvqqg the long bit is actually used.

Running wires through a roof.

This option is quite self explanatory where a hole is simply drilled through the outer roof skin and wires passed through a rubber grommet into the roof cavity and fed down into the vehicle. What does the nec say about running the pv wires through the roof. Thanks all it s a little confoosing. October 02 2013 06 02 35 am you should already have a hole in the roof for 1 1 2 or 2 inch vent pipe for the holding tank and sink drains.

The installer ran the wires without properly sealing them and without leaving an option to add future wires. Additionally if you ever need to redo the roof it will be a pain to deal with the wires that are now in the way. First drill holes in the side of the box for cables big enough to fit the threaded end of the cable gland make sure to leave room for future cables. I could read the reg s section 2 3 2 from the electricans guide to the reg s to say that if a cable passes through joists it needs to be 50mm from top or bottom or in earther conduit.

Drilling through the roof. Looking at the pv power systems and the 2005 nec. I guess i m not passing it through joists it s going over them so i could argue the case it came to it not that i want to argue with the assessor but y know. The best way is to go around the roof not through it.

This is the least favorable option as it is not reversible. You can seal it but it s always going to be a weak spot. Better to come out of wall then go up to the roof. Run the cables through the roof access.

As soon as you have a hole you are providing a path for water. In this video we install a roof mounted wiring box with waterproof cable glands. Suggested practices it says. The next step is to run the solar or antenna cables into the rv through the new access hole.

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