What is the minimum size for a copper-clad aluminum underground service conductor?

The minimum size for a copper-clad aluminum underground service conductor is 6 AWG. This specification is established by the National Electrical Code (NEC) to ensure safe and effective conductivity while mitigating risks associated with overheating and electrical faults.

Copper-clad aluminum conductors are used because they offer a lighter weight alternative to solid copper conductors while still providing adequate conductivity for most service applications. The size of the conductor is critical for ensuring that it can handle the expected electrical load without causing excessive voltage drop or heat buildup.

Choosing a size smaller than 6 AWG may not meet local code requirements or safety standards, which are designed to prevent potential hazards in electrical systems. Therefore, 6 AWG is the standard minimum size used for ensuring that the conductor can safely carry the intended electrical load.