Does it matter if the house electrical panel has a copper buss or aluminum buss?

Yes, it does matter if the house electrical panel has a copper buss or aluminum buss, as this can affect the safety and performance of the electrical system.

A buss is a metal bar that conducts electrical current within the panel, connecting the circuit breakers or fuses to the incoming power supply. Copper and aluminum are the two most common materials used for busses in residential electrical panels.

Copper busses are generally considered to be safer and more reliable than aluminum busses. Copper is a more stable metal than aluminum, meaning it is less likely to expand and contract due to temperature changes, which can cause loose connections and create potential safety hazards. Copper also has a higher electrical conductivity than aluminum, which means it can carry electrical current more efficiently.

Aluminum busses can be more prone to issues such as corrosion, oxidation, and thermal expansion, which can lead to loose connections, overheating, and potential safety hazards. For this reason, aluminum busses may require more frequent maintenance and inspection to ensure their safe operation.

In summary, while both copper and aluminum busses can be used in electrical panels, copper busses are generally considered to be safer and more reliable due to their superior electrical conductivity and stability. Homeowners should consult with a licensed electrician to determine the best type of buss for their specific electrical system.