Electrician's Licensing Practice Exam

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According to NEC 230.9(A), how far must an unsheathed service conductor be from an opening window?

1 foot
3 feet
5 feet
6 feet

The correct answer is: 3 feet

According to NEC 230.9(A), unsheathed service conductors must be at least 3 feet away from any opening window. This requirement is established to minimize the risk of accidental contact or interference with the conductors, which could occur if someone were to open the window or lean out of it. The goal is to enhance safety by providing a buffer zone to prevent accidental electrical hazards, particularly in areas where people may frequently interact with windows. Ensuring adequate distance from window openings helps to reduce the likelihood of objects or individuals coming into contact with the conductors, thereby lowering the risk of electrical shock or other accidents. The National Electrical Code sets these guidelines to ensure safe practices in the installation and placement of electrical conductors in proximity to accessible spaces in buildings.