On 8/8/2020 12:40 PM, wrote:
My water comes from a well. When the well was drilled I had only
built my shop and so the well is now powered by my shop. The pressure
tank and switch is also at the shop.
Now that the house is built I need to power the well from the
house. This is fine but I am not gonna move the pressure tank and the
pump switch must be at the tank for proper operation.
The problem I must address is how to use the switch at the tank
while using power from the house. I cannot run power from the house to
the tank and then to the well pump because the voltage drop would be
too great due to the much longer run of wire.
My plan is to instead use the existing wires coming from the shop
and going to the well to just carry switching power, not pump power. I
want to use a couple solid state relays, one for each leg of the 240
power, to switch the power to the well. There is plenty of room to
mount two solid state relays inside the well junction box. And I found
AC controlled solid state relays that use 80 to 280 volts AC for
control and will switch up to 480 volts AC at 25 amps. My well pump is
a 2 HP pump that draws less than 10 amps. It is a capacitor start
type pump so it draws less current at start up than a non-capacitor
type pump.
So, my questions: Are solid state relays suitable for this type of
work? Are they typically able to handle surge current loads from motor
starting? Here is a link to the relay in question:
https://www.mpja.com/download/33984-86RLData.pdf
Thanks,
Eric

MY well is powered from the shop line as well as your well. The
shop/garage is on a separate 100 amp line from the service point. The
house is a 200 amp line from the same service point.

Why do you need to change the source of service to the pump?

Paul