NEC Commercial Electrical Practice Test

When heating and air conditioning equipment is located on the rooftop, how far must a single phase 15 or 20 amp receptacle outlet be from the equipment?

1. 15 ft

2. 20 ft

3. 25 ft

4. 30 ft

The correct answer is: 25 ft

In the context of the National Electrical Code (NEC), when installing a single-phase 15 or 20 amp receptacle outlet in relation to rooftop heating and air conditioning equipment, the requirement is set to ensure safety and accessibility for maintenance purposes. The distance specified in the code is 25 feet from the equipment. This requirement is in place to prevent potential hazards associated with electrical connections and to provide a safe working environment for technicians. Being at least 25 feet away minimizes the risk of accidental contact with energized parts, reduces the chance of electrical hazards during service or maintenance activities, and ensures that the receptacle can be used without interfering with the equipment's operation. Situating the receptacle outlet at the correct distance also ensures that there’s adequate space for technicians to work around the equipment safely, which is crucial given the often confined nature of rooftop workspaces. Overall, this distance aligns with best practices for electrical safety, addressing both accessibility and proximity to potentially dangerous equipment.