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Water in breaker box

I have a 25 yr. old cabin in rural Oklahoma. Recently, I have noticed water dripping into the breaker box. The electrical service enters the house via a 2 inch grey PVC pipe into the attic. The PVC pipe ties directly into the breaker box.
I am thinking condensation is forming in the pipe. How do I fix this problem. I'm scared!:confused:

Re: Water in breaker box

Most likely water penetrates the electrical box thru the opening of the 2" PVC.

You need to seal it. You can use a special putty for outdoor uses (available at HD). Another solution, a bit more involved, is to build a water proof mini shed around the box or an awning to keep water away.

Re: Water in breaker box

A simple bead of exterior caulk where the PVC enters the building will stop your leak. Don't cheap out on the exterior grade caulk, find a low temp caulk if temperatures are cold in Oklahoma this time of year . Most $5.00 tubes recommend application above 50F. Spend the $10.00, and don't be frightened.

Just ensure the box has been ventilated and there isn't any moisture in the box before you send power to the panel.

MLB Construction
Re: Water in breaker box

another thing to check is the weather head. that's where the grey cable enters the pvc pipe. there should be a water loop in the grey cable prior to it entering the pvc pipe. if you google or youtube "what should my electrical weather head look like" you'll get a good idea if yours was installed properly.

Re: Water in breaker box

True, both the weatherhead and the flashing area on the roof are prime suspects.

Even if the masthead doesn't actually allow running water to enter the conduit, condensation could form due to high humidity or lack of adequate "make-up air" in your HVAC system.

If even a fraction of a pound of air vaccuum is created, moist outside air could be sucked into the mast and condense in your power panel.

A clue would be if an outside door tends to fly open (inward) when the HVAC is running.

If so, it will be real hard to caulk the masthead so that moist air does not enter beside the wires. An HVAC tech may actually be the guy to call!

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