Motor load on a duplex receptacle

C

cppoly

Senior Member
Location
New York
If a 3/4 HP (13.8), 120V sump pump were to be connected to a duplex receptacle, how would this work if the circuit breaker would be 35 amps (13.8 x 2.5) yet the duplex receptacle would be just 20 amp?
 
Unless motor load holds on 20A breaker, 210.21(B)(3) requires 40A rated receptacle, or hardwired equipment.

210.8(D) requires GFCI either way.
 
The jibberish regarding Cord-and Plug-Connected motors at 430.42(C) makes no sense to me.
 
The only thing is I wouldn't use a duplex recpt because somebody always plugs something else into it like a space heater
 
cppoly said:
If a 3/4 HP (13.8), 120V sump pump were to be connected to a duplex receptacle, how would this work if the circuit breaker would be 35 amps (13.8 x 2.5) yet the duplex receptacle would be just 20 amp?
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First of all a 3/4 HP sump pump is not really a 3/4 HP motor, its marketing. Most 3/4 HP sump pumps I run across show around 10 amps on the label.

A sump pump or any other other listed appliance with a factory installed cord and plug is designed to plugged into a circuit base on the rating on the plug. If it has a 15 amp plug it can be connected to a 15 amp or 20 amp circuit. If it has a 20 amp plug it gets connected to a 20 amp circuit.

There is no requirement increase the circuit by 250%.

You can not protect a 15 amp duplex receptacle or 20 amp receptacle with larger than a 20 amp overcurrent device.
 
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