USCG Exam PracticeEngine-room safety and hazardous materials
Under 46 CFR §183.530, electrical equipment installed in a space containing machinery powered by gasoline must be which of the following?
- A. Weatherproof and double-insulated
- ✓ Explosion-proof, ignition-protected, or part of an intrinsically safe systemCorrect
- C. Listed to NFPA 70 Article 500 only
- D. Explosion-proof only; ignition-protected equipment is not permitted
Why B is correct
46 CFR §183.530(a) requires that electrical equipment in spaces containing machinery powered by gasoline or other fuels with a flashpoint of 43.3 °C (110 °F) or lower must be explosion-proof or ignition-protected, or be part of an intrinsically safe system. The regulation provides three acceptable options, not just one.
Cited:46 CFR §183.530