USCG Exam PracticeElectrical troubleshooting and maintenance
Per 46 CFR, the design and arrangement of electric apparatus within an enclosure must ensure which of the following regarding spacing between energized components?
- ✓ Spacing must comply with the appropriate industry standard for the voltage and current of the circuit, and must be sufficient to facilitate servicingCorrect
- B. Spacing must be a minimum of one inch regardless of voltage or current rating
- C. Spacing must be determined solely by the NEMA enclosure type rating assigned to the equipment
- D. Spacing requirements apply only to components operating above 600 volts
Why A is correct
46 CFR §111.01-7(b) requires that spacing between energized components (or between an energized component and ground) within an enclosure be to the appropriate industry standard for the voltage and current utilized, and that spacing also be sufficient to facilitate servicing. No fixed minimum dimension or voltage threshold is specified in this section.
Cited:46 CFR §111.01-7