The wiring for a pendant box must be protected against which type of environmental condition?

The wiring for a pendant box must be protected against strain, which is essential to ensure the longevity and safety of the wiring system. Strain refers to the mechanical tension or stress that wires can experience due to their installation or their working environment, particularly in applications where they may be subjected to movement, pulling, or bending.

Protecting against strain helps to prevent damage to the conductors that could lead to shorts, open circuits, or other electrical failures. This is particularly important in pendant applications, where the wiring may be suspended and therefore could experience additional forces due to movement or inadvertently being pulled.

While moisture, vibration, and heat can also impact electrical installations, the specific focus with regard to a pendant box is primarily on protecting the wiring from physical strain. This highlights the importance of securing and supporting the wiring adequately to mitigate these risks.