It’s also sometimes used inside walls. A bare aluminum wire is in continuous contact with the metal sheathing. The combination of aluminum wire, sheathing and metal boxes grounds the circuit.

"As long as the installer follows typical best practices, CCA performs just as well as solid copper wire." Their observations have been reaffirmed at the highest levels by federal safety agencies.

BRENTWOOD, Tenn., March 5, 2025 /PRNewswire/ -- For over half a century, Copper-Clad Aluminum (CCA) building wire has been installed in family homes across the United States, silently demonstrating ...