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.