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entry into class 1 div. 2 location

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    entry into class 1 div. 2 location

    I am coming from a unclassified location into a class 1 div. 2 location underground they are the same building with walls separating them. What I was wondering is if the classification extends underground of if it ends at the floor, and if it extends underground how deep does it go.

    #2
    "Bob"
    Robert B. Alexander, P.E.
    Answers based on 2017 NEC unless otherwise noted.

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      #3
      it is documented using Section 500.4(A).

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        #4
        I am assuming:
        1. You have a document that shows one room to be unclassified and one to be Class I, Division 2.
        2. The installation is not subject to any of the Articles 511 through 516.
        If that be the case, the floor of the Class I, Division 2 is commonly considered to be the boundary.
        "Bob"
        Robert B. Alexander, P.E.
        Answers based on 2017 NEC unless otherwise noted.

        Comment

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