Voltage drop

[CRESCENT CHRIS]

I have a four hundred foot run of 12-3 seowa cord. I have a 5 amp load for a pump. Would this be a big enough gauge for this application seeing this is s.o. Cord?

 

[raider1]

What voltage is this pump motor?

Chris

 

[gar]

081125-1510 EST

Your loop wire resistance is about 0.8*1.588 = 1.3 ohms. At 5 A this is about 6.5 V drop. But under startup your current might be 35 to 50 A. How well does the motor start is your concern. If it starts within about 2 seconds and you leave it run for long times it should not be a major problem.

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[raider1]

I also came up with about a 6.5 volt drop. this was about a 7% drop for a 120 volt circuit and a 3.5% drop for a 240 volt circuit.

I agree that the motor start up could be a problem.

Chris

 

[roger]

Is this a temporary installation or will it be permanent wiring? This seems like an awful long extension cord?

Roger

 

[tryinghard]

I have a four hundred foot run of 12-3 seowa cord. I have a 5 amp load for a pump. Would this be a big enough gauge for this application seeing this is s.o. Cord?

12-3 cord must be single phase and a formula can be: VD = 2 x K x I x D / CM.

Check out: Voltage Drop Calculator , you?re scenario is around 3.4% or 7.9 VD minimum at 230V.