USCG Exam PracticeElectrical safety and general safety
Electrical equipment installed in a space containing machinery powered by gasoline must meet which standard under federal regulations?
- A. Waterproof or watertight construction per 46 CFR §28.350(a)
- ✓ Explosion-proof, ignition-protected, or part of an intrinsically safe system per 46 CFR §183.530Correct
- C. Double-insulated construction with a separate equipment ground per NFPA 70
- D. Grounded metallic enclosures per 46 CFR §183.220(e)
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, ignition-protected, or part of an intrinsically safe system. Waterproofing and grounding address different hazards and do not satisfy this requirement.
Cited:46 CFR §183.530