What is the proper electrical voltage and phase rating distributed throughout the facility?

The proper electrical voltage and phase rating for the facility is 120/208 V, 3-phase, 4-wire and 277/480 V, 3-phase, 4-wire. This configuration is commonly used in commercial and industrial settings to provide power for various types of loads.

The 120/208 V system is typically utilized for general lighting and receptacle loads, making it suitable for a wide range of applications in a facility. The 277/480 V system is often employed for larger motors and high-demand equipment, providing the necessary voltage for heavy industrial applications. The presence of multiple voltage levels within the same system allows for flexibility and efficient distribution of power throughout the facility, catering to different operational needs.

Each voltage rating also reflects the specific wiring and transformer configurations that ensure the safe and effective delivery of electricity. The 3-phase, 4-wire systems enhance load balancing and reduce the risk of voltage drops, which is crucial for maintaining the operational efficiency of electrical devices.

This combination of voltage ratings is widely accepted and provides a robust infrastructure for electrical distribution in modern facilities, making it the correct answer.