As Joe is remodeling his parents' home, what type of wiring is he likely to encounter when installing a new washer and dryer?

In residential settings, especially in older homes, aluminum wiring is commonly found, particularly in circuits that support major appliances like washers and dryers. This type of wiring was frequently used in the mid-20th century due to its cost-effectiveness and lightweight nature.

While copper is also a widely used wiring material due to its excellent conductivity and resistance to corrosion, Joe is more likely to come across aluminum wiring during his remodeling, especially if the home has not been updated recently.

Plastic and fiber optic options are not typically used for wiring appliances. Plastic is used for insulation on electrical cables, but it does not serve as a conductor. Fiber optic cables are utilized for high-speed data transmission and are not relevant to typical household appliance installations. Thus, when considering the context and historical practices in electrical work, aluminum is indeed a plausible choice for the wiring Joe will encounter for the washer and dryer installation.