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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?

  1. A. The lighting circuit switch must be located inside the hazardous space for rapid de-energization
  2. B. A single lighting branch circuit is sufficient if it is protected by a ground-fault circuit interrupter
  3. At least two lighting branch circuits must be providedCorrect
  4. 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.

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Under 46 CFR §111.106-3, lighting circuits serving explosion-proof… — USCG Exam Practice · CaptainsGround