motor protection

[bhalp]

120 volt 1/2hp sump pump with f.l.c. 12amps & at locked rotor 22amps. what size wire should i use? & what size circuit protection should i use?

 

[ItsHot]

Somewhere around 500.

 

[augie47]

test question ??
tell us what you determined (and how)
although a 500 would work..you might come up with something different

 

[benaround]

120 volt 1/2hp sump pump with f.l.c. 12amps & at locked rotor 22amps. what size wire should i use? & what size circuit protection should i use?

If you want to be safe, use #12 on a 20a c.b.. You could probally use #14 on a 20a c.b.

but not enough info to say for sure.

 

[Loffgren]

re

re

Somewhere around 500.

perfect :grin:

 

[Cold Fusion]

120 volt 1/2hp sump pump with f.l.c. 12amps & at locked rotor 22amps. what size wire should i use? & what size circuit protection should i use?

Cord and plug, or hard wired?

cf

 

[Cold Fusion]

120 volt 1/2hp sump pump with f.l.c. 12amps & at locked rotor 22amps. ...

Just curious -
Test question or motor name plate data? Reason I ask is 12A is way too high for a 120V, 1/2hp motor.

cf

 

[tryinghard]

Article 430 of course

 

[raider1]

Just curious -
Test question or motor name plate data? Reason I ask is 12A is way too high for a 120V, 1/2hp motor.

cf

I agree.

This sounds like a test question.

Chris

 

[George B.]

Breaker and wire size

Breaker and wire size

Check out 430.42(C).This will guide you to the CB size if the manufacturer doesn't specify what to use. See Table 430.248 and you will see that 9.8 amps is standard for the motor rating given.

 

[bhalp]

its not a test question. we were told that a sump pump had to be installed at the stadium and we were not given the motor yet to see the nameplate or the instructions. we were just given the info that i stated. i thought to run 10awg with a 30amp time delay. turns out that 12awg with a 20amp regular breaker was plenty. i thought you had to rate the wire and breaker acording to locked rotor not f.l.c..thanks for everybodies help