What is the best / leak proof way to get power to the disconnect box?
We are installing packaged units on the roof. The units will be placed on curbs. Power will be coming up from below and passing through the roof. I assume it is best to mount the disconnect box to the side of the unit itself.
(A). Make a separate penetration up through the roof, run flexible conduit to the unit and seal the roof penetration with tar.
(B). Come up under the curb, drill a hole in the side of the curb, come out the side of the curb with a conduit adaptor, then run the conduit strait up into the disconnect box.
(C). Come up under the curb, then go up through the packaged heat pump, and then go out the side of the heat pump directly into the disconnect box.