Pump Motor Overheating - High Amps

G

Guest

Yes, you can use 10 awg. (if its not bad) But if the pump is running when you get home, I suspect that you fixed your problem and that you are on the high end of current draw.
 

bk406

Well-known member
Dec 3, 2009
2,690
Central Massachusetts
It's the amps that dictate wire size. You can run 220 on 14 AWG as long as you dont exceed 12 amps or so.

For 10 awg, that calls for a 30 amp breaker, max. For that pump at 75 feet, I'd use the 10 awg wire and a 30 amp breaker. Thats plenty of power. At the higher voltage, you wont use as much current, but the power usage will be the same as 120v.
 

captjake

Member
Aug 30, 2010
23
OK, so just stopped home. Pump is running, good pressure, no indication of tripping the breaker. Motor casing is hot and still drawing 18A. Will watch it to see if thermo goes.
 
G

Guest

I would guess the current was probably always that high, If you can, feel the wire near the pump end and see how hot it is?
 

captjake

Member
Aug 30, 2010
23
Black/neutral is hot. White is warm.

Black is hot at the timer. White is cool.

Do you think there is a problem with the neutral?
 
G

Guest

No, I suspect its always been that way. Are you going to switch it over to 220v?
 

captjake

Member
Aug 30, 2010
23
Sorry, meant to say white/neutral. Typed too fast.

I'm thinking about switching it over to 220V, but it's running now and no trip outs, so...?
 
G

Guest

captjake said:
Sorry, meant to say white/neutral. Typed too fast.

I'm thinking about switching it over to 220V, but it's running now and no trip outs, so...?
Its ok for now, but I would switch it over to 220V, black wire is not suppose to be hot, (to much current). Do you have to change the mechanical timer out?? If not, I think it would be pretty simple and only cost you a 30AMP 220V breaker.
 

davemac2

Member
Aug 15, 2010
10
Just curious, but where are these motors being sourced from? Are they brand new? rebuilt?

I think these motors have a voltage change plug, an internal wiring block and the two line leads coming out of the motor casing which you would connect to your power source with twist on connectors, right? Have you touched anything inside the motor besides the voltage change plug?

Even though your ampmeter is new, have you tested it on a known load such as a 100W bulb?

These motors have a cooling fan enclosed at the back. Can you feel exhaust air while the motor is running?

When the motor is free running, does it get really hot or just warm?

So you are on your second, brand new motor here of the same make, model?

dave mc
 

captjake

Member
Aug 30, 2010
23
New motor from pool store

Very simple design. Wire run into the back and connect to 3 terminals. Voltage change plug and capacitor. Nothing else to touch.

Yes, ammeter tested on AC unit. Working fine.

Yes, fan is working and exhaust vents are clear.

Motor runs hot, but these size motors are always at least very warm. Ambient temp here is +88 degrees.

Yes, same make and model motor. Only so many places to get them.