What is the maximum distance a 15 or 20A, single-phase, 125V receptacle must be located from heating, air-conditioning, and refrigeration equipment?

The requirement for the maximum distance from heating, air-conditioning, and refrigeration equipment to a 15 or 20A, single-phase, 125V receptacle is established to ensure safety and accessibility for service and maintenance. The National Electrical Code specifies that receptacles must be located no more than 25 feet from such equipment. This distance is designed to provide ample reach without the risk of damaging equipment during service or unintentionally using an extension cord, which could create safety hazards.

Setting the limit at 25 feet instead of a shorter distance ensures that service personnel can operate safely while being close enough to use tools or equipment without straining or reaching overly far. This regulation helps in maintaining both practical accessibility and electrical safety standards, reducing the chances of accidents related to electrical equipment used in HVAC contexts.