What is the minimum distance required by OSHA 1926.550 between overhead power lines rated 50kV-200kV and construction equipment?
Correct Answer
A) 15 feet
OSHA 1926.550 requires a minimum 15-foot clearance between construction equipment and overhead power lines rated 50kV to 200kV. This prevents electrocution hazards during crane and equipment operations.
Why This Is the Correct Answer
OSHA 1926.550 specifically mandates a 15-foot minimum clearance distance for overhead power lines rated between 50kV and 200kV when operating construction equipment. This regulation is designed to prevent electrical arc flash and electrocution incidents that can occur when conductive equipment gets too close to energized power lines. The 15-foot distance provides adequate safety margin considering the potential for electrical arcing and equipment movement during construction operations.
Why the Other Options Are Wrong
Option B: 10 feet
20 feet exceeds the minimum requirement for 50kV-200kV lines, though it would be safer; OSHA 1926.550 requires 20 feet for lines over 200kV to 350kV.
Option C: 20 feet
6 feet is insufficient clearance for high-voltage lines in the 50kV-200kV range and would create serious electrocution hazards due to potential electrical arcing.
Option D: 6 feet
10 feet is the required clearance for lower voltage lines (up to 50kV) under OSHA 1926.550, but is inadequate for the higher 50kV-200kV range specified in this question.
Memory Technique
Use '50-200 = 15' - the middle voltage range gets the middle clearance distance. Or remember 'Fifty to Two-hundred needs FIfteen feet' emphasizing the 'FI' sound connection.
Reference Hint
OSHA Construction Standards 29 CFR 1926, Subpart CC - Cranes and Derricks in Construction, Section 1926.550, Table CC-1 for power line clearance distances
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