Where conductors run above the top level of a window, what is the requirement related to the 900 mm (3 ft) rule?

Where conductors run above the top level of a window, what is the requirement related to the 900 mm (3 ft) rule?

• A. They must be at least 900 mm from the window
• B. They are exempt from the 900 mm requirement
• C. They must be 1.5 m away from the window
• D. They can be 300 mm away from the window

Answer: (B)

When conductors run above the top level of a window, the requirement related to the 900 mm (3 ft) rule states that they are exempt from this distance requirement. This exemption exists because conductors positioned above the window level do not pose the same risk of contact or interference as those that might be located at lower heights. The NEC provides guidelines to ensure safety and accessibility, targeting the potential hazards associated with conductors near areas where people might reach or come into contact. The exemption recognizes that above-window conductors are generally out of reach and thus do not present the same concerns regarding accidental contact that conductors at a lower level might pose.

When conductors run above the top level of a window, the requirement related to the 900 mm (3 ft) rule states that they are exempt from this distance requirement. This exemption exists because conductors positioned above the window level do not pose the same risk of contact or interference as those that might be located at lower heights.

The NEC provides guidelines to ensure safety and accessibility, targeting the potential hazards associated with conductors near areas where people might reach or come into contact. The exemption recognizes that above-window conductors are generally out of reach and thus do not present the same concerns regarding accidental contact that conductors at a lower level might pose.