commercial deep fryer

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chevyx92

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VA BCH, VA
Went on a service call today for a melted plug and recep. Got there and breaker was obviously tripped. Recep was melted good and plug even worse. Put the meter on the recep and still had power on one leg. Strange I thought, so I checked the breaker and it was leaking 70 volts through, so I changed breaker out. Now it was a 3 pole 60A breaker feeding a 60A 3 phase 4W Recep for a deep fryer. I looked at the nameplate on the fryer and it said it pulled 57amps per phase. This kinda of load on a 60A breaker violates 210.23(A)(1). I wondered why it was done this way. Does 422.11(F)(1) come into play here at all?? Could this have been hard wired and been legal as far as disconnecting means goes? The unit does have an off position. Oh by the way I swapped out the plug and recep for new ones.
 
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chevyx92 said:
This kinda of load on a 60A breaker violates 210.23(A)(1).
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How so?
210.23(A) 15- and 20-Ampere Branch Circuits.
A 15- or 20-ampere branch circuit shall be permitted to supply lighting units or other utilization equipment, or a combination of both, and shall comply with 210.23(A)(1) and (A)(2).
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Your fryer is at 60A.
 
I agree with Celtic, the code article that you've referenced does not apply to a 60 plug and receptacle. Maybe the unit need a 100 amp receptacle and plug.
 
infinity said:
I agree with Celtic, the code article that you've referenced does not apply to a 60 plug and receptacle. Maybe the unit need a 100 amp receptacle and plug.
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Read the article I quoted. 210.23(A)(1)!
 
chevyx92 said:
Read the article I quoted. 210.23(A)(1)!
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You can quote it until the cows come home, it applies to 15/20A ONLY ...read 210.23(A) again.

You cannot just pick any article you want and apply it to a particular scenario.
 
celtic said:
You can quote it until the cows come home, it applies to 15/20A ONLY ...read 210.23(A) again.
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Agreed, this doesn't apply since 210.23(A)(1) only applies to 210.23(A) which only applies to 15 and 20 amp circuits.
 
celtic said:
You can quote it until the cows come home, it applies to 15/20A ONLY ...read 210.23(A) again.

You cannot just pick any article you want and apply it to a particular scenario.
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I wasn't just picking an article. I didn't read 210.23(A). I went straight to 210.23(A)(1) for some reason. Probably the whole 80% of branch circuit rating was in mind. Anyway, so your saying that 57amps on the 60 amp circuit is fine. Doesn't matter if it exceeds 80% of circuit?
 
BTW chevy....sorry if I jumped all over you and your cows there ~ had one of "those" days (and nights).
 
celtic said:
Can we try on 422.11(F) for size?
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Thats what I was wondering about. It talks about heating elements being subdivided and each subdivided load not to exceed 48 amperes and protected at not more than 60 amps. The nameplate says 57amps. So how would this fall in here? :confused:
 
chevyx92 said:
Thats what I was wondering about. It talks about heating elements being subdivided and each subdivided load not to exceed 48 amperes and protected at not more than 60 amps. The nameplate says 57amps. So how would this fall in here? :confused:
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I'm unsure that it would. Is the cord and plug factory installed? If the cord and plug are rated for 60 amps and installed by the manufacturer I see no reason why this unit wouldn't properly operate on a 60 amp circuit with a 60 amp receptacle. Does the applied voltage match the nameplate voltage? 240 volts on a 208 volt appliance would bring the current level way above the nameplate rating of 57 amps.
 
chevyx92 said:
Thats what I was wondering about. It talks about heating elements being subdivided and each subdivided load not to exceed 48 amperes and protected at not more than 60 amps. The nameplate says 57amps. So how would this fall in here? :confused:
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I don't have an answer for you :-? ...and I have 4 of those to connect.

The best I can figure, at this time - and this may even be wrong - is something along the lines of continuous duty and 125% ...48A @125% = 60A ...close enough to 57A, but is it right?
 
Is it possible that this unit falls under 422(F)(2)--- I don't know but if it has sheathbed-type heating elements (whatever that is) it may.
 
chevyx92 said:
Thats what I was wondering about. It talks about heating elements being subdivided and each subdivided load not to exceed 48 amperes and protected at not more than 60 amps. The nameplate says 57amps. So how would this fall in here? :confused:
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It would'nt. 422.11(F)(1) is talking about factory installed supplementary OCPD's
 
fryer

fryer

saw them replaced on a 6 month basis at a local restaurant....was always more amazed the grease ladden plug didn't burst into flame.
Looked into going to higher amps....size and cost were prohibitive to restaurant owner.
 
The disc is OK looking at 422.34 and from 210.20(A) I see an 80A OCPD (57 x 1.25= 71.25A) provided 422.11(A) does not come into play. Are the conductors large enough to accomodate this?
Possibly the breaker broke down from the excessive heat , faulted and allowed larger and /or imbalanced currents on the line(s) leading to the cord and plug failure.
 
where the cord and plug attach is a weak point on an overloaded circuit. just repairing this would be a temporary fix. a continuous load of 57 amps should have an 80 amp circuit.
 
cjnickjr said:
The disc is OK looking at 422.34 and from 210.20(A) I see an 80A OCPD (57 x 1.25= 71.25A) provided 422.11(A) does not come into play. Are the conductors large enough to accomodate this?
Possibly the breaker broke down from the excessive heat , faulted and allowed larger and /or imbalanced currents on the line(s) leading to the cord and plug failure.
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I second this answer.
422.10(A) also applies.
Unless there is a need for occassional unplugging of the equipment, I would up size the circuit to 80A as recommended above & hardwire it. This should provide a safer connection eliminating the constant grease hazards from the plug & overheating issues.
 
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