Looking at the pressure switch, I'm sure it was at the center of the fire.
The cap didn't burn completely because it must have blown off as i found it a few feet away.. obviously it was still on when something got hot as it melted before blowing off.
one set of load / line contacts is COMPLETELY gone.. the metal wasn't even present and wires were burnt back..
we had no storms in the area so i dount it was a spike that came down one leg o fthe 240 and popepd one contact.. though i have seen a switch blow apart when lightning hit. but no rain.
we have 2 wells on the farm. last week i found ants inthe points on the north well and all it did was gum em up and burn the contacts and kill water.
I field them with my points hone after pulling disconnect, and she was good.
put out some ant 'feed' around the well and a mothball in the power box.
that ran me out of ant 'feed' as i didn't think i needed any for winter.. but was gonna do this pump this weekend... just didn't get to it in time i guess.
My theory is ants got intot he contacts and maybee made them arc and they got hot on that side, and the palstic substraight melted and let the contacts get hot.. but not enough to trip the breaker.. and at some point a fire started from t he plastic insulators of the points box?
then the pipe insulation started.. top of the points box burned a bit too.. gauge bit the dust.. ets dipragm died.. etc.
that's my best guess anyway.
punp cycled fine.. didn't act labored.. cap box didn't look hot or bulged and it's wires looked good, just conduit died and the feeder wires died from fire contact.
only other theory is that where the wires came out of the 'line' side of the incoming conduit and then bent around to hit either line contact int he point sbox.. maybee some insulation chaffed and didn't dead short .. but setup an arc and it got hot and burned??
dunno? whatever it was it started in the points box, and on the incoming side where the line would enter and the first line / load set of contacts and conenctors was completely gone.. nuttin left..