Where independent support wires of a suspended ceiling assembly are used to support raceways, cable assemblies, or boxes above a ceiling, they shall be secured at how many ends?

• A. One end
• B. Two ends
• C. Both ends
• D. Any ends

Answer: (C)

When you suspend a ceiling assembly using independent support wires to hold raceways, cable runs, or boxes above the ceiling, those wires must be secured at both ends. Securing both ends keeps the wire taut and the supported components firmly in place, resisting movement from vibration, thermal changes, or accidental contact. This minimizes the risk of sagging, shifting, or detaching parts that could damage conductors or create safety hazards. If only one end were secured, the wire could move or loosen, compromising the installation. Securing at any single end or only one end would not provide the required stable, anchored support. Hence, the requirement is to secure both ends.