Which of the following is NOT a critical point for fault-current calculations?

In fault-current calculations, it is essential to identify various components of the electrical system that can significantly influence the fault current levels. These calculations are crucial for ensuring equipment can safely handle potential fault conditions without sustaining damage or posing safety risks.

Service entrance equipment, motor control centers, and transfer switches are all critical points in a power system where fault currents can be substantial. Service entrance equipment is typically the first point of entry for electrical supply into a building, making it a vital area for fault current calculations because it determines how much fault current the service conductors must be able to carry. Motor control centers are crucial in controlling and protecting motors and other equipment; thus, they must be evaluated for their ability to tolerate fault currents. Transfer switches are also important as they facilitate switching between different power sources, and they must be rated to handle the fault current levels that may occur during a transition.

On the other hand, outdoor lighting fixtures generally do not have a significant impact on the overall fault-current calculations for a system. While they contribute to the total load, their individual contributions to fault current are typically minimal compared to larger components such as service entrances, motor control centers, and transfer switches. Therefore, they can often be excluded from the critical analysis of fault currents in a