I'M INSTALLING A GOULD 1 1/2 HP SUBMERSIBLE WELL PUMP.FROM...

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Question by HILLBILLY
Submitted on 2/17/2004
Related FAQ: Electrical Wiring FAQ (Part 1 of 2)
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I'M INSTALLING A GOULD 1 1/2 HP SUBMERSIBLE WELL PUMP.FROM THE HOUSE TO THE TOP OF THE WELL IS ABOUT 250',WHERE THERE IS A JUNCTION BOX,THEN THE PUMP IS ABOUT 250' DOWN IN THE GROUND.THE PUMP IS 230V 1PH ON A 30 AMP DP BREAKER.MY QUESTON IS WHAT SIZE WIRE SHOULD RUN FROM HOUSE TO JUNCTION BOX,AND FROM JUNCTION BOX TO PUMP?

Answer by dan
Submitted on 4/28/2004
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10 gauge

Answer by frankf
Submitted on 6/16/2004
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Gould recommends running no more than 480' of #10 wire to a 1-1/2HP pump. As a licensed Master Electrician, I would suggest you run #8 copper to the pump head and #10 down the well to the pump.

Answer by Pump Guy
Submitted on 2/10/2005
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I'm looking at the Franklin Electric Application data. you can go 510' on 10 so you are VERY close to max. You never said if the Pump is a 2 wire or 3 wire? If it a 2 wire with a Junction box to switch from Submersible cable to Under ground cable then You need to run #8 If it is a 3 wire you could get by running #8 to the top of the well then #10 down hole. That is very risky, I have always been taught that you run one size wire the whole way. If it were my install I would use a #8 the whole way.

Answer by shua
Submitted on 2/24/2005
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i agree with frankf. you need to take into account voltage drop over such a long distance, so going with the larger gage wire in the first run (from the main breaker to the well top) is your best bet.

Answer by ranga
Submitted on 12/4/2005
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6 square mm copper cable is sufficient to 1-1/2 single phase submersible motor.

Answer by master Dave
Submitted on 6/8/2006
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My experience has shown me very little voltage drop in 500'. # 10 will work great. Your pump should pull around 11 amps at full load. #12 will work but, I would use #10. Then you won't have to worry about temperature rating of the insulation.

Answer by buzzard
Submitted on 6/20/2006
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I would stick with 10 myself

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