Wire through roof

[nate379]

I need to pass a 12/4 SJOOW wire in a conduit through my shed roof into a single gang box. (for solar panels)

What is the correct way to do that and not have it leak?

Was thinking of using a vent pipe flashing, but smallest I can find is 1.5".

[bonedust]

a piece of sheetmetal flashing and a twistseal firewall grommit

[PAToyota]

Originally Posted by nate379

What is the correct way to do that and not have it leak?

Correct way? Service entrance head.



They make them down to 1" in size.

[Sirennet]

We have used these on countless Police and Fire vehicle builds Quick Disconnect With 22' Cable . They have a lot of wires, but you can combine sets of wires for higher draw connections. They are dis-connectable, high quality, and very well sealed, just not super cheap at around 180 with all wiring.

[nate379]

I got it worked out. I drilled a ~1" hole alongside the truss, stuck in a 3/4" 90* sweep metal conduit and clamped it to the truss under the roof. The opening of the 90* is downhill.

Ran the 2 cables in each (#6 ground and the SJOOW 12-4 wire) and then used some black jack roof tar to seal it all up. I have used it in the past with good success (Direct TV installer lag bolted a dish to my roof at the wrong end of my house.. didn't wait till I got home to start work).

Building is just a storage shed with an open ceiling, so if it does end up leaking I will be able to tell and repair it without causing any issues. It's under a panel and it's close to the peak so not like it will be seeing all that much water either.

I had found some roof jacks that went small enough, but they were like 6" tall. From the roof service to the under of the solar panel I have maybe 3-4".