When independent support wires are used for a suspended ceiling assembly, how many ends should they be secured?

When independent support wires are used for a suspended ceiling assembly, it is crucial to secure both ends. This is necessary to ensure stability and safety in the installation. Securing both ends helps in distributing the weight of the ceiling system evenly and prevents any sagging or movement that could occur if only one end is secured.

By anchoring both ends, the assembly is better able to withstand environmental factors such as vibration or shifting over time, as well as any forces that might act on it, such as the weight of the ceiling tiles or additional fixtures that may be attached to the ceiling. The NEC recognizes the importance of proper support and securing to maintain the integrity of electrical installations and related structures.