An open service conductor without an overall outer jacket shall have a minimum clearance of how many feet from the sides of doors, porches, and openable windows?

The requirement for an open service conductor without an overall outer jacket to have a minimum clearance from doors, porches, and openable windows is established to ensure safety and accessibility. The minimum distance of 3 feet is intended to prevent accidental contact with the conductor, which could lead to electrical hazards.

This clearance allows sufficient space for individuals to move freely without the risk of brushing up against the conductor, which could result in electric shock or other dangerous situations. Ensuring this distance is part of the broader electrical safety codes aimed at minimizing potential hazards associated with electrical installations.

The other options represent distances that exceed the requirements set forth in the National Electrical Code (NEC) and other applicable standards. While safety is paramount, the specified minimum of 3 feet is deemed adequate for this type of installation, balancing safety concerns with practical considerations in residential construction.