Geez. i have to admit i don't know very much about the well itself.
The pipe sticks up about a foot out of the ground. It has a switch that is a couple of feet down and an electrical wire coming out of it, up over the lip of the pipe, into a small PVC into the ground and presumably either under the house or directly over to the main circuit breaker panel. The rest of the well apparatus is several feet further down. Last time I had the pump switch replaced, the guy stuck a pipe down several feet, screwed into a platform and raised the whole thing up out of the pipe. That's the full extent of my knowledge on the well.
Update on the digging, I actually finished it last night after work. I had to get down in the hole and it ended up being five feet deep before I got up under the tank. The plumber is coming out tomorrow (Friday) to install the new one in the crawlspace.
If there is anything more I need to know or to ask him, please let me know.
Sounds like you have a pitless adapter (that is what he screwed the pipe into to pull the pump). The wire coming up over the top of the casing and into the PVC pipe into the ground either goes to the pressure switch (with a 2 wire pump) or to the pump control box (with a 3 wire pump) and then to the pressure switch. In either configuration, after the pressure switch the cable goes to the circuit breaker panel.
The tank, pressure switch and controll box (if you have one - 3 wire pumps only) should end up iin the crawl space. The plumber should be able to reuse the piping and wiring going to the house.
Coastal South Carolina