[Janb33]

The line from the well has 3 wires where should the bare ground wire be attached? The line from the house has 3 wires where should the white ground wire be attached?

[ma0641]

What colors do you have? 3wires is not common for a 240 volt pump and 120 would only need 2 plus a ground.The white is a neutral and not used in 240 volt pumps.

[donf]

Please describe the wire from the home. Is it a black, white and bare ground?

First, White is not a ground wire. It is by definition the grounded conductor, Neutral. It's purpose is to allow the return of the power to the system. The "white" may be a re-tasked conductor.

In some situations the White conductor is re-tasked to be an un-grounded, Hot conductor

[hkstroud]

There are 2-wire and 3-wire well systems. Unless you have an unusually large capacity or or unusually deep well you will have a 2-wire. The wires from the well will probably be red and black and a ground which is either green or bare. The wires from the house will be black and white and a ground which will be bare. The ground wires from the well and the house will be connected to the 2 green ground screws in the switch box frame. The two wires from the house and the 2 wires from the well are connect to the switch electrical terminals. Most well pumps are 240 volts. Most of the time white designates a neutral. There is no neutral in a 240 volt circuit and in this case the white is a hot conductor. Put a piece of black electricians tape on it to redesignate it as a hot conductor and connect it to the switch terminal.

[stanfortyman]

The line from the well has 3 wires where should the bare ground wire be attached? The line from the house has 3 wires where should the white ground wire be attached?

Assuming a deep well with a 240V pump:
The green goes to one of the green screws in the pressure switch.

In the house cable the black and the white are your two hots giving you 240V. There is no neutral in a 240V circuit.