I am in the process of replacing my submersible well pump( single phase, 220v, 4 wires from pump). At my wellhead the electrical connection is as follows I have two hot lines one common and a bare ground. My question(s) begin here, at some point it seems that the 220v at well head turns to 120v 10-2 wire which is of course run to my safety shut off(30amp breaker) then to my pressure switch both of these only having 3 wires a hot a common and a bare ground. According to the diagram on the inside cover of this control box I am going to be short one wire unless I install at the wellhead and I'm uncertain of the water proof capabilities of the control box so I would really rather connect this where my shut off, pressure switch and pressure tank is located. 
Thank you in advance for any help provided it will be greatly appreciated.
Wiring – confusion about wiring control box for a submersible well pump
plumbingwiring
Best Answer
Put the control box in a box
If you're unsure about the water resistance abilities of your well pump control box, you can simply stick it inside a suitably sized NEMA 3R rated enclosure securely mounted at the wellhead, with the cables routed in to the outer box through knockouts in the bottom and a small drain hole drilled in the bottom to equalize pressure and let condensation exit.