Power and cost savings can be achieved in a 415 VAC system with use of fewer poles at the breaker panel, smaller gauge power cords, less expensive plugs and reductions in cooling costs by having fewer power cable drops which can impede cabinet airflow. The reduced current requirements in a 415 VAC system can cut costs by mitigating line power losses that data centers experience every time electricity passes through a power converter or transformer. High physical density and high power density go “hand in hand” when it comes to the data center. To maximize both without having to pay for specialty infrastructure, many data centers have found it attractive to deploy 415V 3-phase AC power to the rack. This paper gives the reasons why this is a cost-effective alternative for many applications.