What is the minimum clearance required for overhead spans of outdoor open conductors rated at not over 1,000 volts when passing over public streets and roads?

The minimum clearance required for overhead spans of outdoor open conductors rated at not over 1,000 volts when passing over public streets and roads is indeed 18 feet. This clearance is established to ensure safety for both the general public and vehicles that may be traveling underneath these electrical conductors.

Considering the potential for accidental contact with tall vehicles such as buses, trucks, or construction equipment, this height helps to prevent electrical hazards. Compliance with these clearance requirements is crucial to mitigate the risks of electrical accidents caused by low-hanging wires, particularly in areas with varying traffic and pedestrian activity.

The specification of 18 feet aligns with standard safety regulations outlined in electrical codes, which prioritize public safety by setting appropriate distances to prevent electrical interference and potential hazards near roadways.