What size equipment grounding conductor is required between the safety switch and BCES Chiller 2?

The correct choice of a 2 AWG equipment grounding conductor size between the safety switch and the BCES Chiller 2 is typically based on both the size of the overcurrent protection device and the total connected load of the equipment. In electrical installations, the grounding conductor must be adequately sized to ensure safety by providing a reliable path for fault currents, which can occur during electrical faults.

For equipment like chillers, which may have significant loads, the National Electrical Code (NEC) provides guidelines on grounding conductor sizing. When determining the appropriate size, factors such as the conductor type, the length of the run, and other specific installation conditions must be taken into account. The NEC stipulates that the grounding conductor must not be smaller than the minimum size prescribed for the specific application based on the equipment capacity.

2 AWG is often selected for larger equipment, reflecting the requirements that reinforce safety standards while ensuring proper grounding continuity. This choice provides sufficient capacity to carry fault currents while minimizing voltage drop, protecting personnel and equipment from electrical hazards effectively.