What size copper conductor is typically used to connect the electrical circuit from the disconnect to a 10kW electric furnace?

For a 10kW electric furnace, the correct size copper conductor typically used to connect the electrical circuit from the disconnect is indeed 6 AWG.

When determining the appropriate wire gauge for an electric furnace, the factors considered include the load's amperage, the distance of the run, and the conductor type. A 10kW electric furnace typically draws around 41.7 amps (calculated using the formula: Power (W) = Voltage (V) × Current (A), with 240 volts). According to the National Electrical Code (NEC) guidelines, for a continuous load, conductors should be sized at 125% of the load's current for safety and to prevent overheating.

In this case, a conductor size of 6 AWG is generally deemed appropriate as it can safely handle a load of this magnitude. It ensures that the wiring can manage the current demand without excessive resistance, thus minimizing the risk of overheating and ensuring reliable operation of the furnace.

Choosing a wire that is too small, such as 8 AWG or 10 AWG, would not provide adequate capacity for the 10kW load, increasing the risk of heat buildup and potential circuit failure. Hence, the proper conductor size