Electric Kiln

  • 14 Feb 2012 10:46 AM
    Message # 825194
    Anonymous
    If you have an electric kiln with nameplate rating of 47 amps, what is the wire size and overcurrent protection that is required?
  • 28 Feb 2012 9:30 AM
    Reply # 838186 on 825194
    There is nothing in the MRC that deals with a continuous  load which I am assuming a kiln would be (operating for three hours or more) so we need to go to the NEC and the NEC would have us apply the 125% rule. Hence 47a. times 1.25 is 58.75a. Wire size would be #6 cu or #4 al with a 60a. overcurrent device.


    210.19(A)
    310.15
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