On windy days air blows into the house through the electrical service panel.
The weather head appears to have a tight gasket so I'm assuming the air is
entering through the meter box. Should the meter box seal completely or is
there supposed to be another gasket in the pipe between the meter box and
the service panel entrance? Who is financially responsible for this type of
repair? Electric company or do I own the problem and need to call an
electrician? Or perhaps just guck up the meter box with some silicone caulk?
You don't want to glue the meter box shut; someone will have to open it
someday. I think I would plug the end of the service conduit where it
enters the service panel. Stuff it with rockwool or something, then
seal over it with electrical putty.
A squirt of expanding polyurethane foam would be easier and seal better,
but I would be concerned if you ever have to service those wires they'll
be glued in place. Maybe stuff it with rockwool and apply a thin cap of
Stay away from the foams. Some will degrade the insulation of the wire.
Your not very specific at where the leak is. The riser head is not air
tight. The riser should end up in the meter location. That is purchased and
installed by you. Now it belongs to the utility. Do not mess with it. You
need to go to an electrical wholesaler and get materials for the job.
Stuffing non rated materials in a panel could cause big problems if there is
an arc/fault some day.
We used to call it elephant snot.. I for the life of me can not remember the
right name. I it is used to seal condoles or non explosion proof seal offs.
I can't say for sure where the air is originating but it is coming into the
service panel through the pipe, not around the pipe. I'll head down to the
local electrical supply house and explain what I want the sealer for. Even
though they are a wholesaler selling primarily to tradesmen, they don't mind
helping a do-it-yourselfer homeowner. No, I'm not going to rearrange the
wires or pipe from the weatherhead to the meter. A wise man knows his
I thought it was "DUX seal". Or maybe that's a specific brand name
That is the _only_ material you should use for sealing conduit.
The OP should try to ensure that it's actually airflow _thru_ the conduit,
rather than general air leak from the wall cavity thru the panel.
Air leakage thru the conduit can be a _major_ hazard.
A house two doors down from where we used to live burned down because
of it. Caused heavy corrosion inside the panel, and that's what
started the fire.
Chris Lewis, Una confibula non set est
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