Question

According to 110.5, when the Code refers only to a conductor size and the material of the conductor is not specified, the Code intends the use of ________?

1) Copper conductor
2) Aluminum conductor
3) Any conductor
4) None of the above

Answer 1

The National Electrical Code implies the use of copper conductors when only size is mentioned, as copper is prevalent in wiring due to its high conductivity, strength, and ductility.

Step-by-step explanation:

According to 110.5 of the National Electrical Code (NEC), when the Code refers only to a conductor size and the material of the conductor is not specified, the Code intends the use of copper conductor. Copper is commonly used in electrical wiring for various reasons, including its excellent electrical conductivity next to silver, good tensile strength, and high ductility. Even though other materials like aluminum, silver, and gold are also used in making wires, the preference often lies with copper due to its balance of conductivity, cost, and durability.