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