USCG Exam PracticeSwitchboards and distribution systems
Under 46 CFR §183.330, what is the minimum working space required in front of a main distribution switchboard?
- A. 455 millimeters (18 inches)
- B. 305 millimeters (12 inches)
- ✓ 610 millimeters (24 inches)Correct
- D. 760 millimeters (30 inches)
Why C is correct
46 CFR §183.330(e) specifies that working space of at least 610 millimeters (24 inches) must be provided in front of all main distribution panels and switchboards. The 455 mm (18 inch) figure applies to the rear, not the front.
Cited:46 CFR §183.330