Electrician's Licensing Practice Exam

According to NEC Article 410, are luminaires allowed to be mounted on drop-ceiling tiles?

1. Yes, they are allowed

2. No, they are never appropriate

3. Only with additional support

4. Yes, if properly secured

The correct answer is: No, they are never appropriate

The mounting of luminaires on drop-ceiling tiles is generally not permitted according to NEC Article 410 due to safety and structural concerns. Drop-ceiling tiles are designed primarily for aesthetics and insulation, not for bearing weight. They can easily be dislodged or damaged when luminaires are attached directly to them, which can pose risks such as falling fixtures or compromised electrical connections. While some installations may have specific guidelines that allow for certain types of fixtures under specific conditions, the overarching national code emphasizes safety and stability. Therefore, mounting luminaires directly on drop-ceiling tiles is not considered appropriate. Options that imply any allowance for mounting luminaires on such tiles do not align with the safety standards set forth in the NEC, reinforcing that this practice should be avoided to maintain a safe environment.