Journeyman Electrician Practice Exam

Which of the following wiring methods is NOT allowed for temporary wiring on a construction site?

1. Type S cord

2. Type PD cord

3. Type SJ cord

4. Type W cord

The correct answer is: Type PD cord

The reasoning behind why Type PD cord is not allowed for temporary wiring on a construction site lies in its design specifications and intended use. Type PD cord is typically used for devices that require a flat, flexible configuration, which does not provide sufficient protection against the mechanical stresses and potential hazards present in a construction environment. Temporary wiring needs to meet specific standards for safety and reliability, particularly in the face of potential damage from tools, equipment, and weather conditions. In contrast, other types of cords, such as Type S, Type SJ, and Type W, are constructed to withstand the rigors of a construction site. For instance, Type W cord is especially durable and designed for heavy-duty applications, while Type S and Type SJ cords provide adequate insulation and flexibility for various temporary power needs. Therefore, Type PD’s limitations in protective features and durability make it unsuitable for temporary wiring, while the other types meet the necessary safety requirements for such applications.