The limited approach boundary distance for an overhead line conductor operating at 480 volts, nominal, is ?

• A. 8 ft
• B. 10 ft
• C. 12 ft
• D. 6 ft

Answer: (B)

The limited approach boundary is the safe distance you must stay from exposed energized parts so that you’re protected from electric shock hazards when working near live equipment. For a nominal 480 volts, safety standards set this boundary at 10 feet. That distance provides a practical safety buffer based on the voltage level, helping prevent accidental contact and giving room for control measures like using insulated tools or PPE when approaching energized parts. Distances smaller than 10 feet would place a worker too close for this voltage category, while a larger distance isn’t the standard requirement for this voltage level.