What Size Wire for 100 Amp Breaker?

What is the recommended wire gauge size for a 100 amp breaker?

Is it different for copper and aluminum wire?

Answer:

For a 100 amp breaker, a minimum wire gauge size of 3 AWG is commonly used for copper wire and 1 AWG for aluminum or copper-clad aluminum wire.

When determining the size of wire needed for a 100 amp breaker, it is crucial to consider the type of wire being used. For copper wire, a minimum gauge size of 3 AWG is typically recommended, while for aluminum or copper-clad aluminum wire, a minimum of 1 AWG is often required.

Local electrical codes and specific conditions such as ambient temperature and the length of continuous run should also be taken into account to ensure safety and compliance with regulations.

Using the correct wire gauge size is essential to prevent overheating and potential fire hazards. It is always recommended to consult the National Electrical Code (NEC) or a professional electrician to determine the appropriate wire size for your specific application.

Ensuring the wire gauge is suitable for the 100 amp breaker will help maintain the electrical system's integrity and safety.