Each conduit between the main switchboard and the disconnect switch for Chiller CH-2 contains how many equipment grounding conductors?

The correct answer is determined by the size of the equipment grounding conductor needed for proper grounding and safety requirements in accordance with the National Electrical Code (NEC). The NEC provides guidelines for grounding conductors based on the size of the electrical service and the specific equipment being used.

In the case of a chiller, which is typically a significant piece of equipment due to its power demands, the grounding conductors must meet or exceed the recommendations to ensure safe and effective grounding. An equipment grounding conductor provides a path for fault current to return to the ground, which is essential for protecting both the equipment and personnel from electrical faults.

For larger equipment like chiller systems, the use of a 1 AWG equipment grounding conductor is often necessary to satisfy these safety standards. This size ensures reliable performance in the event of a fault situation, helping to reduce the risk of electrical shock or equipment damage.

Understanding the context of equipment grounding conductors is crucial, as they play a vital role in the overall electrical safety system of a facility, especially with heavy machinery. Properly sizing these conductors not only adheres to regulatory requirements but also mitigates safety risks associated with electrical installations.