Question

Which of the following inscriptions on a wire connector indicates that it is designed for use on both copper and aluminum wire?

1) For Copper Wire Only
2) For Aluminum Wire Only
3) For Both Copper and Aluminum Wire
4) For Neither Copper nor Aluminum Wire

Answer 1

The inscription 'For Both Copper and Aluminum Wire' indicates the wire connector can be used with both types of wire, considering the different properties and requirements for a safe electrical connection.

Step-by-step explanation:

Among the options provided, For Both Copper and Aluminum Wire is the inscription on a wire connector that indicates it is designed for use with both copper and aluminum wires.

Aluminum has a higher rate of thermal expansion compared to copper and can oxidize in a way that does not conduct electricity, which could lead to loose connections and potential fire hazards.

Therefore, special connectors, called CU-AL or CO/ALR (copper-aluminum) connectors, are required for connecting aluminum wire to devices like electrical outlets, or splicing it to copper wire. These connectors are designed to handle the different properties of each metal and to ensure safe electrical connections. The electrical industry uses these specific connectors to prevent connection failures and to ensure compliance with electrical codes.