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Old 02-19-2009, 07:15 PM   #1
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well pump motor

Well pump motor 1hp 230v 9.3amp / 115v 18.6 amp, pressure switch has 2 white wires & 1 black wire, mfg plate on motor says switchable 230v/1155v. breaker panel has 2 15amp breakers for pump. Want to run pump motor off an extension cord from 125v 25amp generator and still be able to convienently return it / plug it back into it's 230v house supply.


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Old 02-19-2009, 07:24 PM   #2
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It seems doable and fairly simple but it hurts my head trying to figure it out . Seems like a couple of simple transfer switches would work.

If I get bored later I'll try and draw it. Someone else may have a better head for control wiring.


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Old 02-19-2009, 07:43 PM   #3
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If you have a double pole breaker for the pump (2 15 amp breakers you said) then you need to look at the pressure switch. Cause your missing a black wire somewhere. If the pump is wired 230 there is no easy way to do this. You say your generator is 125 volt and no 230volt capability. So you would have to rewire the motor to 115 volts, then check your conductor size to see if it is sized appropriately. In a nutshell it needs to be 12 awg minimum not allowing for any long distance to the well pump.

Only way you can do this is to rewire the motor for 115 volts if it is now wired for 230 volts.
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Old 02-19-2009, 07:48 PM   #4
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A switch can certainly be installed that will change the motor voltage from 115 to 230. I've done about a dozen or so over the years. How it's connected depends on how the motor is wired internally.

Problems I can see are;

1) You'll be dealing with two different types of cord plugs.

2) A 3000 watt generator might be able to start a 1HP motor, maybe not.

3) You'll need somewhere to mount the switch. It will likely not fit anywhere on the motor.

We would need the exact connections at the motor for both voltages, or better yet, a pic or two.

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Old 02-19-2009, 09:02 PM   #5
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Note of interest Im from carson city, in floriDUH now, have friends and family
around you. Am trying to private message you but this fourm will not let new members do so. My E-mail is dwayne423@bellsouth.net.

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