In a Class III location, pendant luminaires suspended by stems longer than how many feet must have additional supports?

In a Class III location, the requirements for additional support for pendant luminaires aim to ensure safety and compliance with National Electrical Code (NEC) standards. Specifically, pendant luminaires that are suspended by stems longer than 1 foot are mandated to have additional supports. This is crucial in environments where there may be dust or fibers that could create a Class III hazardous location. The use of additional supports prevents the luminaires from becoming dislodged or causing other safety hazards due to vibration, movement, or accidental contact.

The NEC recognizes that luminaires in these conditions face unique challenges, so maintaining secure installation is vital. The specific requirement regarding the length of the stem ensures that any pendant fixtures that may be more susceptible to movement or impact are adequately supported, reinforcing safety in the installation at all times.