CSLB C-36 Plumbing ContractorSafetyEasy
A plumbing contractor is tasked with installing a new water main through an area with known overhead power lines. What is the minimum safe clearance distance that must be maintained between the equipment (e.g., excavator boom) and power lines rated for 50 kV or less?
- A5 feet
- B20 feet
- C10 feet
- D15 feet
Show answer & explanationAnswer & explanation
Correct answer: C. 10 feet
OSHA regulations specify a minimum safe clearance distance of 10 feet for equipment operating near overhead power lines rated 50 kV or less. This distance increases with higher voltage lines.
Why the other options are wrong
- A. This distance is insufficient for safety near overhead power lines rated 50 kV or less, posing a significant electrocution risk.
- B. This distance is excessive for the specified voltage and not the minimum required by safety regulations.
- D. While safer, 15 feet is not the minimum required distance; 10 feet is the standard for lines up to 50 kV.
Overhead Power Line Clearance
The minimum safe distance that equipment, such as an excavator or crane, must maintain from energized overhead power lines to prevent electrocution.
- 10 feet for lines 50 kV or less.
- Distance increases with higher voltage.
- Always treat lines as energized.
Memory trick: Ten feet keeps you free from electrocution's fiery threat.