Probable Effect Concentration Quotients (PECQS) Practice Test

The correct answer highlights that the motor of an elevator is not permitted as an additional branch circuit supply. This is due to the specific electrical codes and safety standards that govern the operation and installation of elevators. Elevators require dedicated circuits due to their high power demands and the safety implications associated with their operation. These dedicated circuits ensure that the elevator system operates reliably and is not overloaded by other devices sharing the same circuit.

In contrast, standard lighting, specialized equipment, and a pump for an aquarium can typically share additional branch circuit supplies because they are designed to operate safely within the electrical load limitations prescribed by national and local codes. These types of loads are generally considered lower-risk compared to an elevator motor, which has the potential for serious consequences if not managed properly. Hence, the strict regulations on the supply circuits for elevator motors prioritize not only functionality but also the safety of individuals using the elevator.