What size conductors are required between the Veterinary Center MDP and the elevator disconnect?

The correct choice indicates that the conductors required between the Veterinary Center MDP (Main Distribution Panel) and the elevator disconnect are three 4/0 conductors accompanied by a #6 ground. This selection aligns with the National Electrical Code (NEC) requirements, which are crucial for ensuring safety and adequate power supply for elevators.

Using three 4/0 conductors is typically appropriate for handling a substantial amount of current, suitable for the operational needs of an elevator. Elevators often require a higher conductor size due to their significant power draw, particularly during start-up when inrush currents can be high. The choice of a #6 ground conductor is also essential for grounding purposes—a critical aspect in ensuring that the elevator system functions safely and effectively.

It is important to specify that the adequacy of the conductor size is determined not just by the voltage drop limitations, but also by the load capacity being fed to the elevator, which must meet or exceed the manufacturer’s requirements and local codes. These considerations lend to the reliability and safety of the installation, thereby justifying the selection of three 4/0 conductors with a #6 ground.