What is the maximum distance that a 125V, single-phase receptacle outlet can be located from heating, air-conditioning, and refrigeration equipment?

The correct answer, 25 feet, aligns with the provisions set forth in the National Electrical Code (NEC) regarding the placement of receptacle outlets in relation to heating, air-conditioning, and refrigeration equipment. According to NEC guidelines, these outlets need to be positioned within a specific distance to ensure that equipment can be effectively serviced and maintained without the need for long extension cords or other unsafe practices.

Having the receptacle outlet within 25 feet of such equipment enhances accessibility for servicing, reduces the risk of cord damage, and complies with safety standards that aim to minimize hazards associated with the operation of this equipment. This distance is practical for technicians to easily access power, allowing for better efficiency in maintenance tasks.

By specifying this maximum distance, the NEC helps to prevent safety incidents such as tripping hazards or equipment malfunction due to improper power supply. This requirement emphasizes the importance of accessibility and safety in residential and commercial installations.