• Intrinsically Safe Apparatus

    Article 504 of the 2011 NEC focuses on the requirements for Intrinsically Safe Systems.
    June 3, 2014

    Intrinsically safe apparatus, associated apparatus, and other equipment must be installed in accordance with the _____ drawing(s).

    a) approved
    b) control
    c) identified
    d) any of the above

    See answer and applicable Code reference

    The correct answer is: b) control

    Article 504 of the 2011 NEC focuses on the requirements for Intrinsically Safe Systems. As noted in Sec. 504.10(A), "Intrinsically safe apparatus, associated apparatus, and other equipment shall be installed in accordance with the control drawing(s)." There is an Exception for a simple apparatus that does not interconnect intrinsically safe circuits.

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