Roof Unit - Elec Wiring Thru Exhaust Vent?
Question: How far away from "standard practice" is punching a hole in existing roof exhaust vent to run wiring through attic for Tstat?
I have a roof mounted gas pack. They upgrading tstat wiring into the house, through the attic, but the roof jack housing existing electrical is over an area that is inaccessible from the attic (over vaulted ceiling). Current wire is also immovable, tacked and stapled down every few inches, thus we can't push/pull more through the existing roof jack.
Option 1) Penetrate roof and install new roof jack.
Option 2) Use a nearby existing vent, currently used for bathroom fan exhaust.
They want to do #2. I don't blame them, it's quick and easy. Punch hole on side of vent above flange and drop wiring through, seal with poly.
They say it's not against code. I'm leary, but don't need to create a bunch of extra work for them and risk extra roof penetrations for me.