What is the maximum distance an electrical disconnect switch can be from the air-conditioning unit it serves?

The maximum distance an electrical disconnect switch can be from the air-conditioning unit it serves is 50 feet. This requirement is primarily established to ensure safe and convenient access to the disconnect for maintenance and emergency services. Having the disconnect switch within this distance allows technicians to easily shut off power to the unit without having to venture far from the equipment, reducing the risk of potential electrical hazards.

In addition, this distance is also essential for adhering to various electrical codes, which prioritize safety and accessibility. The disconnect must be readily accessible from the unit it serves, ensuring that anyone working on or needing to shut down the unit can do so quickly in case of an emergency. This standard helps maintain safety protocols and operational efficiency within HVAC systems.

The other distances provided in the question do not align with the established safety standards for electrical disconnects linked to air-conditioning systems, hence they do not meet the necessary regulations.