To determine the size of wire needed for a dryer, you should consider the amperage requirement of the dryer. The National Electric Code specifies that a dedicated circuit for an electric dryer should be 30 amps at minimum, but 40-amp and 50-amp dryers are also common. Here are the wire gauge recommendations based on the amperage requirement:

• For a 30-amp dryer, use 10 AWG copper wire.
• For a 40-amp dryer, use 8 AWG copper wire.
• For a 50-amp dryer, use 6 AWG copper wire.

Its important to note that the wire gauge will vary depending on the amperage required for the dryer, the size of the circuit breaker, and the size of the dryer cord. Additionally, when using aluminum wire, the recommended sizing is different.

Its crucial to adhere to these guidelines to ensure the safe and efficient operation of the dryer. Using the correct wire gauge will help prevent electrical hazards and ensure that the dryer operates within the specified electrical parameters.