[wilyum]

Just wondering if a 14.4A pump could run off 12-2 wire 200' from breaker? Not sure the formula or whether the drop puts the load over the 18A limit?

 

[AllanJ]

Is 14.4 amps the maximum draw when the pump starts or is that the normal running current draw (and the pump draws more for a moment when it starts)?

Is this a 120 volt pump or a 240 volt pump?

Too thin wires over too great a distance will cause too great a voltage drop. In response the pump may draw more or fewer amps but in both cases the pump won't run as well as it should and can even be damaged.

If the pump will actually draw 18 amps when it starts then you would need 10 gauge wires for a 240 volt pump or 8 gauge wires for a 120 volt pump.

The number of volts lost in the wiring (round trip) is equal to the amps being drawn at that moment times the resistance of the wiring which is about 1 ohm for 1000' of 10 gauge copper. From the breaker to the equipment and back should have less than 4% voltage drop.

If you need to upsize the wire to combat voltage drop then you can ignore the rule for continuous versus intermittent loads.

 

[Wirenuting]

What is the motor horse power and system voltage?
The information is on the motors data plate.

 

[MrElectricianTV]

Just wondering if a 14.4A pump could run off 12-2 wire 200' from breaker? Not sure the formula or whether the drop puts the load over the 18A limit?

What voltage will you be using?

 

[Speedy Petey]

Just wondering if a 14.4A pump could run off 12-2 wire 200' from breaker? Not sure the formula or whether the drop puts the load over the 18A limit?

Same question here, what voltage?

And what is this "18A limit" you speak of?

 

[dmxtothemax]

3.7% voltage drop or 7.7v.
14A @ 208v 3 phase.
it's within excepted limits.

 

[Wirenuting]

3.7% voltage drop or 7.7v.
14A @ 208v 3 phase.
it's within excepted limits.

He's in Ontario.

 

[Big_John]

For a 120V load you would only see about a 9V drop when running, which is perfectly fine.

But you'd probably see a 40-50 volt drop while starting, which is very significant. If the pump has a centrifugal switch it may never even get up to running speed.

 

[dmxtothemax]

He's in Ontario.

Whats the accepted limits Ontario ?

 

[dmxtothemax]

For a 120V load you would only see about a 9V drop when running, which is perfectly fine.

But you'd probably see a 40-50 volt drop while starting, which is very significant. If the pump has a centrifugal switch it may never even get up to running speed.

You can always run a bigger cable
This will reduce the voltage drop.

 

[Wirenuting]

Whats the accepted limits Ontario ?

% is the same. But what is the voltage? I don't think he has 3phase 208.