NEC Commercial Electrical Practice Test

What is the minimum clearance distance for service conductors installed as open conductors from accessible locations such as windows and doors?

1. 1 foot

2. 2 feet

3. 3 feet

4. 4 feet

The correct answer is: 3 feet

The minimum clearance distance for service conductors installed as open conductors from accessible locations such as windows and doors is 3 feet. This specific distance is established to ensure safety and to prevent accidental contact with the conductors. The reasoning behind maintaining this clearance is to reduce the risk of electrical shock or other hazards that may arise from individuals inadvertently coming into contact with live conductors while accessing windows or doors. Maintaining a 3-foot clearance serves as an important safety measure in residential and commercial installations, ensuring that there is enough distance for people to safely pass by or open windows and doors without the risk of reaching out and touching the exposed conductors. This regulation is in place to protect both people and property, aligning with the overall goals of the National Electrical Code (NEC) to promote safe electrical practices.