I am looking to upgrade the electrical service in my shed to 100amp sub panel and bring up to code the wiring from the meter and 200amp circuit breaker located on an electrical pole 30 feet from my shed. I will be bring 4 wires to the sub panel in the shed 2 hot, seperate neutral and seperate ground My question is on wiring a well. Currently there is 3 wires run to the pressure switch ( 1 black, 1 white and a 1 ground), then 3 wires ( 1 black, 1 white and a 1 ground) running to the 220 pump. When I put in the sub panel in the shed the neutral and ground will NOT be bond together. The ground wire from the pressure switch does it go to the ground side of the sub panel? Thanks in advance for the help.