Oklahoma Electrical Practice Exam

In a residential unit, how far apart must receptacles be set for wall spaces that are 2 feet or more in width?

1. 24 inches

2. 30 inches

3. 36 inches

4. 12 inches

The correct answer is: 24 inches

In residential wiring, the National Electrical Code (NEC) defines specific spacing requirements for receptacles to ensure convenience and safety in electrical design. For wall spaces that are 2 feet or more in width, the NEC mandates that receptacles be installed such that there is no point along the wall that is more than 6 feet from a receptacle outlet. This effectively sets a maximum distance of 12 feet between receptacles in any horizontal run. Given this context, the requirement translates to a need for receptacles to be spaced no more than 24 inches apart because, with a maximum distance of 12 feet, receptacles can be positioned at intervals such that no single point on the wall exceeds the 6-foot maximum distance to the nearest receptacle. Therefore, with the given wall width of 2 feet or more, having receptacles spaced 24 inches apart ensures compliance with the spacing rule while allowing easy access to power outlets throughout the room. This rationale aligns with the correct option, which reflects the code's intent to provide ample availability of receptacles in living spaces, minimizing the risk of overextension of cords and ensuring electrical safety.