Flex conduit through roof

[pls2000]

I'm in the process of replacing my roof mounted air conditioner. I just discovered the that original installer (for a previous owner) ran flex conduit through the roof to provide power.

What the did was to punch a hold in the roof, drag the conduit through it, and slather roofing tar over the hole. Now that area leaks.

Is the a way to provide proper protection and flashing for flex conduit penetrating a roof? Everything I've ever seen or done uses rigid conduit for the actual penetration, usual with a small junction box or pull box at the top.

Thanks,
++PLS

 

[Stuff]

First - traditional FMC (flexible metal conduit) is not permitted since it goes outdoors which is a wet location. Liquidtight (plastic/nylon coated) is what is allowed outdoors.

What about sunlight resistant UF cable instead? Then run it over the roof edge and do a wall penetration.

 

[Sponsor]

 

[Reach4]

Is the a way to provide proper protection and flashing for flex conduit penetrating a roof? Everything I've ever seen or done uses rigid conduit for the actual penetration, usual with a small junction box or pull box at the top.

Another idea... I think a roof penetration, with a roof flashing replacing a shingle, stops rain at the roof.

Then maybe a 1-1/4 weatherhead could go atop the conduit. While 1-1/4 was the smallest I saw, there could be smaller. But their are other options... http://www.quickmountpv.com/products/conduit-penetration-flashing.html?cur=0 has this picture:

This is harder than the UV-resistant UF around the roof edge.

 

[pls2000]

The existing cable is some variation of Liquatite. The problem is that, being flexible, it move and the movement makes sealing the roof penetration pretty difficult.

Yeah, I think Reach4 has the right idea. The only other thing I saw was this:
http://www.lexcor.net/images/tds1/Gooseneck_Flashing_07072015_Web.pdf
But I expect that will be expensive.

++PLS

 

[Norcal01]

Look for a solar flashing perfect for 1/2 sealtite, I would avoid any roof jacks with a rubber seal as they are prone to failure.