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  1. cvandyke9

    How do I select the ambient temp for burried cables in a raceway

    Just to clarify I am trying to figure out what ambient range I need to use in the table 310.15(B)2
  2. cvandyke9

    How do I select the ambient temp for burried cables in a raceway

    I have to size some THWN-2 conductors for use in underground conduit between two pieces of outdoor equipment. I need to figure out the conductor size and I am getting hung up on how to figure out the derating due to the ambient temperature in the area. My first question is how do I select the...

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