Which material is NOT commonly associated with traditional residential wiring?

Lead is not commonly associated with traditional residential wiring due to several factors, including its toxicity and the strict regulations surrounding its use in building materials. While copper and aluminum have been historically utilized as conductors in residential wiring for their good conductivity and durability, lead is generally avoided in modern electrical systems.

Romex® is a brand name for a type of non-metallic sheathed cable that typically contains either copper or aluminum wire, making it widely used in residential wiring. The use of lead in wiring would pose significant health risks, as exposure can lead to serious health problems, particularly in young children. This is why lead is not considered a safe or acceptable material for residential wiring applications today.