I assume this underground line was a 4160 line? Back in the late 80's I
was working out in the Marshall Islands where the underground power
distribution was all 4160 since the largest island was only 3 miles long
and 1/2 mile wide. We ran 15kv rated cable with a semiconductor shield
because of the salt water conditions were everything was required to be
overbuilt so it would hold up. The guys who ran the power plants had
connections and splices explode on several occasions because of the salt
water getting into the insulation down in the manholes. O_o
On Mon, 19 Nov 2012 11:56:38 -0800 (PST), DerbyDad03
That is where I would start. If it is just one circuit, remove the
wire and take a look at it. You may even see some black spots if it
is loose. Clean and replace.
Doubtful, but strange things sometimes do happen.
I had a similar situation. One circuit would go out every few weeks,
sometimes a flicker, other times just out. . Resetting the breaker
seemed to fix it so I was going to replace the breaker. Turns out to
be a loose connection and the breaker is OK.
Resetting the breaker was just enough of a movement to make a good
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