What is the smallest size AWG for the neutral conductor when supplying an 8.75 kW range?

To determine the smallest size American Wire Gauge (AWG) for the neutral conductor when supplying an 8.75 kW range, one must consider the demand calculations outlined in the National Electrical Code (NEC).

The NEC provides guidelines for calculating the maximum demand for household cooking appliances. In this case, the 8.75 kW range can be converted into amperes to find the appropriate wire size. Using the formula:

Amperes = Watts / Volts

Assuming the range operates on a typical voltage of 240 volts, the calculation would be:

Amperes = 8750 watts / 240 volts = 36.46 amperes.

Next, remembering that the neutral conductor typically carries the unbalanced load, it’s essential to size the wire based not just on full load but considering any potential demand factors. According to NEC Table 250.122, for branch circuits, a 10 AWG copper conductor is rated for 30 amperes, while a 8 AWG copper conductor is rated for 40 amperes.

However, when dealing with a 36.46 amp load, a 10 AWG conductor is still the minimum size that can safely accommodate the continuous load under typical conditions, allowing for