What is the minimum clearance required for overhead service conductors not exceeding 600V over commercial areas subject to truck traffic?

The minimum clearance required for overhead service conductors not exceeding 600V over commercial areas that are subject to truck traffic is 18 feet. This requirement is established to ensure the safety of both the electrical system and the vehicles that may pass underneath.

The 18-foot clearance is critical for several reasons. First, it provides sufficient vertical space to prevent accidental contact between vehicles and the conductors, which could potentially lead to electrical hazards or disruptions in service. Additionally, this height is designed to accommodate the tallest typical vehicles, including trucks and delivery vans, minimizing the risk of accidents caused by low-hanging wires.

It's important to note that different heights might apply to other types of areas or for other voltage levels, but for commercial areas subject to truck traffic, an 18-foot clearance is necessary for maintaining safety and compliance with electrical codes.