Water well pump motor supplies 2 locations

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sw_ross

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HO’s house has municipal water service, but there is a well on the property.
Currently the only thing the well is used for is a hydrant to water the horses.
For this, power comes from the house to power the pump motor.

The HO is building a shop structure 400-500’ away from the well.
The shop has a pressure tank in the plans along with toilet and sinks.
The plumbers are getting ready to trench the waterline to the shop from the well.

I’m having a hard time wrapping my head around the pressure switch at the shop supplying power to the well pump when there’s already power coming to the well pump from the house?
I know I’m going to have to run some UF from the shop building to the well pump.
Will the pressure tank at the shop located 500’ away from the well pump keep the system (including the existing hydrant) pressurized? Will the power from the house be abandoned?

Thanks for feedback,
 
I hadn’t even thought about not having a pressure switch at the pressure tank! I was just making assumptions.
that would be great if that’s the case.
I was worried about VD for the 500’ run.
 
sw_ross said:
I hadn’t even thought about not having a pressure switch at the pressure tank! I was just making assumptions.
that would be great if that’s the case.
I was worried about VD for the 500’ run.
Click to expand...
1 HP well motor just say 8 amps. 500’ with #10 is just 8 volt drop. Not a big deal at all.
Mine is 500’ away from the panel. It’s #12 to the well pump in a 400’deep well. Then another 100’ through the yard and house back to the panel.
Never had a bad motor. Had bad impellers, but never a motor out.
 
HO’s house has municipal water service, but there is a well on the property.
Currently the only thing the well is used for is a hydrant to water the horses.
For this, power comes from the house to power the pump motor.
Click to expand...
What matters here is, how is the well pump tuned on and off for a hydrant to water horses? Do they have a simple on-off switch at the hydrant to only turn on the pump when they want water? Do they have a trough and a float switch? You will need to know this when coming up with a way to interface that with how they will want it to operate for the new shop. Having to go to the hydrant mounted switch to turn it on every time you want to use the toilet in the shop is going to be a PITA...
 
Jraef said:
What matters here is, how is the well pump tuned on and off for a hydrant to water horses? Do they have a simple on-off switch at the hydrant to only turn on the pump when they want water? Do they have a trough and a float switch? You will need to know this when coming up with a way to interface that with how they will want it to operate for the new shop. Having to go to the hydrant mounted switch to turn it on every time you want to use the toilet in the shop is going to be a PITA...
Click to expand...
Well now why would you want to throw that detail into the mess? (-:
 
A pressure switch at the shop could be placed in a switch loop that drives the coil of a contactor that's located a lot closer to the source of power. That way a much smaller wire gauge could be used with a negligible voltage drop.
 
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