What would be the primary voltage of a typical furnace?

The primary voltage of a typical furnace is often 120/1/60. This indicates a single-phase electrical service operating at 120 volts, with a frequency of 60 hertz. Most residential furnaces, especially those that utilize standard electrical components for ignition and control systems, are designed to operate with this voltage to ensure compatibility with common household circuits.

In a residential setting, 120 volts is widely used for general lighting and appliances, which means that many furnaces are engineered to work within this standard to maximize convenience and ease of installation. For servicing and safety, this voltage allows for the use of readily available circuit breakers and wiring without necessitating specialized equipment.

Other voltage configurations like 240/1/60 or 240/2/60 are typically found in applications requiring higher power, such as electric heating elements or larger appliances. These options would not be the primary voltage for a standard residential furnace, which is primarily designed for more straightforward applications and convenience in typical home electrical systems.