So cord ampacity....

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cjnickjr said:
I would classity it as a noncontinuous load and use a 25 Amp OCPD per 210.20 (A).
This would allow the use of #10 Cord rated at 25 Amps as you supposed from 400.5 (A).
My reasoning would be that the load consists of 3 parts. The water heating element, surface warmer and 120v indicating lights and or timers etc.
The water heating element which draws the most current for this type of appliance will only draw for the short time when the appliance is first started, leaving a much lower current draw while warming only.
HTH
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Your scenario would not with comply with 210.23. Cord and plug connected not fastened in place can't exceed 80% of the branch circuit ampere rating.
 
After searching the code for a while, I see your pain. But how about using a 40 amp recept and cord cap. I don't see a reason that you can't and it would solve your problem.
 
cjnickjr said:
I would classity it as a noncontinuous load and use a 25 Amp OCPD per 210.20 (A).
This would allow the use of #10 Cord rated at 25 Amps as you supposed from 400.5 (A).
My reasoning would be that the load consists of 3 parts. The water heating element, surface warmer and 120v indicating lights and or timers etc.
The water heating element which draws the most current for this type of appliance will only draw for the short time when the appliance is first started, leaving a much lower current draw while warming only.
HTH
Click to expand...
I agree that the cord should be protected in accordance with its capacity, 25 amps per 240.5. That solution does not match your cord cap though.
According to 240.5 (B) (1) we can use the 30 amp OCPD, and the #10 cord if the cord is approved for use with this specific appliance. It shall be considered to be protected when in the appliance listing requirements
What size cord does the Manufacturer recomend?
 
woodduder said:
After searching the code for a while, I see your pain. But how about using a 40 amp recept and cord cap. I don't see a reason that you can't and it would solve your problem.
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Probably could have. Just figured a 40 amp circuit was a little over kill.
 
You don't need a 40 amp circuit. You can use your 30 amp circuit and put a 40 amp recept on it. The recept per 210.21 (B) can't have a rating LESS than the branch circuit. A rating higher than the circuit is allowed. I do believe it is permissible and in this situation would be a perfect solution.
 
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