Another Well Pump Question?

blueridge · Sep 27, 2020

On my Submersible Pump wiring is hooked directly to pressure switch, I was looking at the one at church and it has a Pump control box on the wall, wiring goes to it then to pressure switch? Should i have a Control box like that on mine, same tank and setup as mine? thanks for any help Gene

old · Sep 27, 2020

I've seen them done both ways and I cannot see why a control box is needed other then to waste $$

buickanddeere · Sep 27, 2020

(quoted from post at 14:02:31 09/27/20) I've seen them done both ways and I cannot see why a control box is needed other then to waste $$

Not always a conspiracy to over charge .
There may have been a start relay and capacitor in that $$$ box . Saves having to pull the pump out of the well if the starter switch fails . The capacitor reduces the starting inrush current and reduces the time required to spin the pump up to full rpm .
That control box may contain thermal protection for the motor .
Larger pumps and motors have dedicated controls in a box instead of just plugging in as small appliances do .

Russ from MN · Sep 27, 2020

I have had them both ways, doesn't seem to make a difference.

Steve@Advance · Sep 27, 2020

I agree, keep everything "down the hole" as simple as possible!

Paul Janke · Sep 27, 2020

If I remember correctly some pumps do not need a control box. Size of the pump can make a difference, but so can the design of the pump.

David G · Sep 27, 2020

It depends on the pump model, do not assume.

buickanddeere · Sep 28, 2020

(quoted from post at 15:22:20 09/27/20) I agree, keep everything "down the hole" as simple as possible!

The two wire well pump will have to be pulled from the well when the starter switch fails .
The three wire pump has the starter switch and start capacitor in the control box . No need to pull the pump when they require service .
A 3/4HP three wire requires less staring current Bs a 3/4HP two wire . The three wire 3/4HP runs up to rated rpm sooner vs a 3/4HP two wire .
The three wire single phase pump can also be upgraded to the Constant Pressure control system with a VFD and a pressure sensor . A two wire can not be used with a constant pressure drive .
Saves having the pump beat its self up with stop-start
Cycles when used as constant pressure .
Constant pressure also has a soft start for less torque on the well pipe . Less starting current demand if operating on a backup generator .
The best well pump is three phase which is more efficient and eliminates the starting winding , switch and capacitor if so equipped . They also have constant pressure drives that use 240V single phase input and supply the pump with three phase power .

showcrop · Sep 28, 2020

Large, as in thirty gallon bladder tanks should not be replaced with same when they fail. They should be replaced with two gallon tanks with constant pressure regulating valve and 3/4 HP 3 wire pump. Especially when you are in or going into retirement years.

bc · Sep 29, 2020

I'm in the process of getting my well rigged up. Have to cut a hole in the steel casing with a torch 3 feet down for the pitless adapter. I bought a 2 hp submersible, 230 volt, with 2 wires plus ground (total of 3). The instructions specifically state a control box is not needed with this pump. So check the specs on your pump. Mine says to hook directly to the pressure switch.

buickanddeere · Sep 29, 2020

Is it too late to obtain a three wire pump with the control box ?
Someday a three wire design will spare the owner time and money in future . By allowing service without pulling the pump .
Three wire will also allow the use of a constant pressure controller.
The constant pressure controller will reduce excessive cycling when such an over size pump is used .
Starting current inrush will be reduced if used with a generator or solar supplied power system with a constant pressure controller .
Most importantly , that a constant pressure system provides run dry protection .

Destroked 450 · Sep 29, 2020

When we put our first well pump in back in the late 60's it was a 1 1/2 hp 3 wire with control box, I replaced that pump in the mid 80's with a 2 wire pump and no control box, replaced it again 7 years ago when the plastic pump stages broke, pump is 380 ft down.
We have a 2 hp 3 wire pump with control box for our poultry house well, replaced the motor 3 years ago after pumping 11 million gallons, that pump is 500 ft down and free flows into a 40,000 reservoir using a float switch
There's two 3/4 hp two wire pumps in the reservoir suppling water to a 120 gallon bladder tank for the buildings.
I wasn't sure about the two wire 1 1/2 hp pump at first but it's gave pretty good service suppling water to 3 homes in the 80's up to the 6 homes it supplies water to today, but above 1 1/2 hp I want a 3 wire pump.

Another Well Pump Question?

blueridge

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old

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buickanddeere

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Russ from MN

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Steve@Advance

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Paul Janke

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David G

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buickanddeere

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showcrop

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bc

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buickanddeere

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Destroked 450

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