Attached is a picture from when I rewired the box: the 20 amp two pole is marked Well. Sorry for calling dual twenty! We have no water and having someone come out to megger the underground line is a good idea.
The fuse shut off with the underground line disconnected from the well house. Can I try the breaker alone or will the load on the breaker with no wires throw it anyway? This new breaker flips quick a couple of times before setting. When hooked up to the well house, the breaker throws a spark while shutting off immediately after turning on.
If a short is identified by a megger, can they locate the break in the underground line or does the line have to be replaced?
I replaced the breaker as this box is in bad condition and the house breaker had burnt out causing a major electric problem in the house. The pressure switch was from 1980 with corrosion so took the opportunity to upgrade. Thanks!
Well fuse runs two black and white 120 wires to the conduit where it is wired into the yellow underground line. Thinking now maybe there is a loose connection at the splice as never have seen this splice. As the ground is very wet, this could be the short if the connection is in the ground below the box - would not be surprised from what I've fixed here so far!