Intrinsically safe apparatus, associated apparatus, and other equipment must be installed in accordance with the _____ drawing(s).
a) approved
b) control
c) identified
d) none of the above
See answer and applicable Code reference
The correct answer is: b) control
The provisions of Art. 504 cover the installation of intrinsically safe apparatus, wiring, and systems for Class I, II, and III locations. 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).