What is the minimum clearance requirement for overhead conductors above finished grade where the voltage does not exceed 150 volts?

What is the minimum clearance requirement for overhead conductors above finished grade where the voltage does not exceed 150 volts?

• A. 2.7 m (8 ft 6 in)
• B. 3.0 m (10 ft)
• C. 3.7 m (12 ft)
• D. 5.5 m (18 ft)

Answer: (B)

The minimum clearance requirement for overhead conductors above finished grade where the voltage does not exceed 150 volts is established to ensure safety and prevent accidental contact with the conductors. According to the National Electrical Code (NEC), specifically NEC Article 225, overhead conductors that operate at this voltage level must maintain a clearance of at least 3.0 meters (10 feet) from the ground. This clearance is designed to protect both personnel and vehicles from coming into contact with the conductors, reducing the risk of electrical shock or other accidents. The NEC sets this standard based on safety considerations for both public and private properties, ensuring that there is sufficient vertical space to accommodate a variety of activities occurring beneath the conductors. While other options present greater clearance distances, they are not mandated for conductors operating under 150 volts, making the 3.0 meters (10 feet) requirement appropriate and sufficient for safety in this context.

The minimum clearance requirement for overhead conductors above finished grade where the voltage does not exceed 150 volts is established to ensure safety and prevent accidental contact with the conductors. According to the National Electrical Code (NEC), specifically NEC Article 225, overhead conductors that operate at this voltage level must maintain a clearance of at least 3.0 meters (10 feet) from the ground.

This clearance is designed to protect both personnel and vehicles from coming into contact with the conductors, reducing the risk of electrical shock or other accidents. The NEC sets this standard based on safety considerations for both public and private properties, ensuring that there is sufficient vertical space to accommodate a variety of activities occurring beneath the conductors.

While other options present greater clearance distances, they are not mandated for conductors operating under 150 volts, making the 3.0 meters (10 feet) requirement appropriate and sufficient for safety in this context.