Receptacle

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codequestion

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I have commericial kitchen with following:

1. Dedicated receptacle outlet for Food processor, full load amps of 13.5 amps, single phase, 120V.

2. Dedicated receptacle outlet for Commericial food blender, full load amps of 13 amps, single phase, 120V.

3. Printer shelf with two receptacle outlet, total with both receptacle has full load amps of 16 amps, single phase, 120V.

Following questions:

1. What size should the branch circuit breaker be per code?

2. What would be the nema rating of the receptacle be? Nema 5-15p or 5-20p?

3. Should nema rating match branch circuit breaker size? So if receptacles are nema 5-15p then breaker be sized 15 amps per code?

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For a commercial kitchen I wouldn't ever use 15 amp receptacles, regardless of the load. You can use 15 amp receptacles on 20 amp circuits as long as there is more than 1 receptacle (a duplex receptacle counts as 2 receptacles).
 
Leespark57 said:
For a commercial kitchen I wouldn't ever use 15 amp receptacles, regardless of the load. You can use 15 amp receptacles on 20 amp circuits as long as there is more than 1 receptacle (a duplex receptacle counts as 2 receptacles).
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your saying commericial kitchen 15a receptacles never be used. Should all three items post #1 be in 20 amps receptacle? Lets say its duplex receptacle item #1&2 commericial blender, food processor post#1. Should nema 5-15p not be used?

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If you have a simplex, or single, receptacle, it can be 15 amps for your first two items. See 210.21 B. Both would have a Nema 5-15 receptacle, you cannot put a 20 amp receptacle on a 15 amp circuit.

As for the third, you would need a 20 amp duplex receptacle on a 20 amp circuit as you cannot put 16 amps of load on a 15 amp receptacle, or breaker. I am not 100% sure on this last item since 15 amp receptacles are rated for 20 amp pass through...

As for the breaker, you can put 13.5 amps on a 15 amp breaker so long as it's not a continuous load.

20 amp commercial grade receptacles are more often used in my opinion do to their better construction rather than needing to accept a 5-20 plug... Very little kitchen equipment that I have seen is corded with a 5 - 20
 
After checking the plugs themselves for compatibility, I would use:

1. 20a single receptacle on a 20a circuit.

2. 20a single receptacle on a 20a circuit.

3. 20a duplex receptacle on a 20a circuit.
 
210.21 (b)(2) says where connected to branch circuit supplying 2 or more receptacles, a receptacle shall not supply cord and plug connected load in excess of maximum specified in table 210.21 (b)(2).

210.21 (b)(3) says where connected to branch circuit supplying two or more receptacles, a receptacle rating shall conform to table 210.21 (b)(3).

Als see 210.3 for circuit rating meaning.

So here my interpretation but I could be wrong: duplex receptacle ( 2 receptacles) , one of the two receptacles powers one cord connected blender has full load of 13 amps. So max load is over 12 amps already. Per 210.21 (b)(2) and table 210.21 (b)(2) circuit rating has to be 20 amps. So my overcurrent protection has to be 20 amps

Now per nec 210.21 (b)(3) and table 210.21 (b)(3) circuit rating of 20 amps receptacle ratings can be 15 or 20 amps.

So then for the blender 13 amps full load coming from duplex receptacle I must have 20 branch circuit breaker but receptacle rating can be 20 or 15 amps????

I could be wrong on above??

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codequestion said:
210.21 (b)(2) says where connected to branch circuit supplying 2 or more receptacles, a receptacle shall not supply cord and plug connected load in excess of maximum specified in table 210.21 (b)(2).

210.21 (b)(3) says where connected to branch circuit supplying two or more receptacles, a receptacle rating shall conform to table 210.21 (b)(3).

Als see 210.3 for circuit rating meaning.

So here my interpretation but I could be wrong: duplex receptacle supplied by one cord connected blender has full load of 13 amps. So max load is over 12 amps already. Per 210.21 (b)(2) and table 210.21 (b)(2) circuit rating has to be 20 amps. So my overcurrent protection has to be 20 amps

Now per nec 210.21 (b)(3) and table 210.21 (b)(3) circuit rating of 20 amps receptacle ratings can be 15 or 20 amps.

So then for the blender 13 amps full load coming from duplex receptacle I must have 20 branch circuit breaker but receptacle rating can be 20 or 15 amps????

I could be wrong on above??

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A duplex receptacle counts as two receptacles. If you have a Simplex receptacle, a receptacle with the ability to accept one plug on the yoke instead of two, and that is the only receptacle on the circuit, you can load it to 15 amps for a 5 - 15, or 20 amps for a 5 - 20.
 
codequestion said:
1. Food processor is Robot Coupe CL50 Gourmet.

2. Blender is Vitamix 62826.


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I got confused. I have nema 5-15p thats the power cord plug nema rating from the equipment not recptacle rating. Can that power cord plug be connected to 20 amps duplex receptacle with 20 amp branch circuit? Or its just best to provide 15 amps receptacle with 15 amps branch circuit breaker?

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Last edited:
codequestion said:
I got confused. I have nema 5-15p thats the power cord plug nema rating from the equipment not recptacle rating. Can that power cord plug be connected to 20 amps duplex receptacle with 20 amp branch circuit? Or its just best to provide 15 amps receptacle with 15 amps branch circuit breaker?

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In general there is no harm in connecting an appliance with a 15A plug end to a 20A receptacle on a 20 A circuit.They designed the 20A receptacle to compatibly accept 15A plugs for a good reason. :)
 
Little Bill said:
I would put all 20A receptacles as they are better built, IMO.
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If you compare 15 and 20 amp receptacles of the same series from the same manufacturer, you will find that internally they are identical. The only physical difference is the T slot in the face. The internal conductive parts of the 15 amp will accept the 20 amp plug.
 
codequestion said:
I got confused. I have nema 5-15p thats the power cord plug nema rating from the equipment not recptacle rating. Can that power cord plug be connected to 20 amps duplex receptacle with 20 amp branch circuit? Or its just best to provide 15 amps receptacle with 15 amps branch circuit breaker?

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You can use either a 15 or 20 amp circuit for either piece of equipment. A 5 - 20 receptacle accepts a 5-15 plug.
 
JFletcher said:
You can use either a 15 or 20 amp circuit for either piece of equipment. A 5 - 20 receptacle accepts a 5-15 plug.
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Lets say I installed 20 amps feeder circuit breaker thats feeds more than one duplex receptacles. Each duplex recptacles recptacle is nema 5-20R rated. Now in one receptacle lets say I plug in device with nema 5-15p plug and their is a fault greater than 15a but less than 20a at the device. Feeder breaker will never trip. Will not the nema 15p plug burn out or cause fire hazard?

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codequestion said:
Lets say I installed 20 amps feeder circuit breaker thats feeds more than one duplex receptacles. Each duplex recptacles recptacle is nema 5-20R rated. Now in one receptacle lets say I plug in device with nema 5-15p plug and their is a fault greater than 15a but less than 20a at the device. Feeder breaker will never trip. Will not the nema 15p plug burn out or cause fire hazard?
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You need to work on the terminology so we know what you're talking about. It's not a feeder circuit breaker it's a branch circuit, a feeder is something different.

The device has a 15 amp plug so it can be used on a 15 amp branch circuit, when it's on a 20 amp branch circuit (which is also permitted) how would there be a fault greater than 15 amps but less than 20 amps?
 
infinity said:
You need to work on the terminology so we know what you're talking about. It's not a feeder circuit breaker it's a branch circuit, a feeder is something different.

The device has a 15 amp plug so it can be used on a 15 amp branch circuit, when it's on a 20 amp branch circuit (which is also permitted) how would there be a fault greater than 15 amps but less than 20 amps?
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I dont know how or even possible but if their is such a fault or current drawn somehow or if even possible then it can cause fire hazard. No? Is it possible?

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codequestion said:
I dont know how or even possible but if their is such a fault or current drawn somehow or if even possible then it can cause fire hazard. No? Is it possible?
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I won't say that it's impossible but it highly unlikely. If somehow the current on the device exceeded the rating of the power cord you could have a problem but the NEC doesn't think it will happen or they wouldn't allow the 15 amp plug on a 20 amp circuit.
 
infinity said:
I won't say that it's impossible but it highly unlikely. If somehow the current on the device exceeded the rating of the power cord you could have a problem but the NEC doesn't think it will happen or they wouldn't allow the 15 amp plug on a 20 amp circuit.
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Scenario may have been overlooked by NEC? Revision to the NEC 2020 or 2017 if still possible?

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