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Thread: Article 409.20 conductor-minimum size and ampacity

  1. #1
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    Article 409.20 conductor-minimum size and ampacity

    Article states...the size of the industrial control panel supply conductor shall have an ampacity not less than 125% of full load current rating of all heating loads plus 125% of the full load current ratings of all other connected motors and apparatus based on their duty cycle that may be in operation at the same time.

    So if I have 4 heaters that come on at same time 7amps for each one.

    7x4=28
    Is it 28x1.25=35 for heating loads

    Sent from my Moto Z (2) using Tapatalk

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    Yep

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