What minimum clearance from medium-voltage lines must be maintained when erecting scaffolding?

• A. A minimum distance of 3 meters (10 feet) must be maintained.
• B. A minimum distance of 1 meter (3 feet).
• C. A minimum distance of 2 meters (6 feet).
• D. A minimum distance of 5 meters (16 feet).

Answer: (A)

Maintaining a safe buffer from overhead medium-voltage lines is essential to prevent electric shock and arcing while erecting scaffolding. The minimum clearance is 3 meters (10 feet). This distance accounts for line sag, sway in wind, and the possibility that metal scaffolding or tools could bridge a gap if they come into contact with a live line, protecting workers as they move and operate near the edge of the scaffold.

If that distance cannot be kept, work should be halted and the utility should be consulted to de-energize the line or implement safer arrangements. Smaller clearances don’t provide enough protection, while a larger distance goes beyond the minimum requirement.