And electricians out there

pt70 said

You have a 60 amp meter socket with a 60 amp breaker box? If so, And the distance from the meter socket/breaker box is less than 100 feet, then the breaker box should have no more than 20 amp breakers [or fuses] to protect the downstream wire and pump. I am assuming # 12 copper wire. This will provide plenty of extra electricity for the heaters. Split the 220 volt in the well house into [2] 110 volt plug in outlets. Then you can decide what type of heaters to use and easily change them to a different type if you want to. And unplug them when not needed.

My jet pump draws 13 amps at 110 volts. 20 amp circuit breaker. #12 wire @ 50 feet. I am not an electrician.

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When the PO did the well his guy put a 60 amp breaker at the pole box to fed it, 220 amp jet pump and the pump that handles the large tank. The well is about 75 ft from the pole, sound lke I need a 20 amp to feed the well pumps , 20 amp to fed the line to the shed with the heat lamps. II will all our guy that repairs the well when needed and find out exactly what size breakers I need for the well house.
Over the last 15 years I built and wired 2 small homes ( some would all them cabins @ 1000 and 1500 sq ft) a garage and several barns. I bought a similar book one wiring from Lowe's, I got it done and returned the book. Knew I would never find it again if I needed it!!! I got it all done but I was NOT fast! Never had any problems with any of it.
I admit out here in the country we don't always do things correctly!