USCG Exam PracticeEngine-room safety and hazardous materials
Under 46 CFR §111.106-3, lighting circuits serving explosion-proof or flameproof fixtures in an enclosed hazardous space must meet several requirements. Which of the following is specifically required by that section?
- A. The lighting circuit switch must be located inside the hazardous space for rapid de-energization
- B. A single lighting branch circuit is sufficient if it is protected by a ground-fault circuit interrupter
- ✓ At least two lighting branch circuits must be providedCorrect
- D. Fixtures must be individually fused at the fixture junction box
Why C is correct
46 CFR §111.106-3(e)(1) requires at least two lighting branch circuits for lighting circuits serving flameproof or explosion-proof fixtures in an enclosed hazardous space. Additionally, §111.106-3(e)(3) prohibits placing the switch and overcurrent device within the space, making option A incorrect.
Cited:46 CFR §111.106-3