The independent support wires for supporting electrical wiring methods in a fire-rated ceiling assembly shall be distinguishable from fire-rated suspended-ceiling framing support wires by _____.
c) other effective means
d) all of the above
See answer and applicable Code reference
The correct answer is: d) all of the above
Article 300 covers the general requirements for wiring methods and materials for all wiring installations. Securing and supporting requirements are outlined in Sec. 300.11. As noted in the third sentence of 300.11(A)(1), "Where independent support wires are used, they shall be distinguishable by color, tagging, or other effective means from those that are part of the fire-rated design."