What is a consequence of changing servers from 110V to 220V in a datacenter?

Changing servers from 110V to 220V primarily impacts power consumption and distribution in a datacenter. The correct consequence of this change is that the amperage consumed by each server will be reduced by 50%. This reduction occurs because, according to Ohm's Law, power (measured in watts) is the product of voltage (V) and current (A). By doubling the voltage while maintaining the same power usage, the current must proportionally decrease.

For example, if a server requires 1000 watts of power, at 110V, it would draw about 9.09 amps (1000 watts / 110 volts). When supplying the same server with 220V, it would only draw about 4.55 amps (1000 watts / 220 volts). This decreased amperage can lead to less energy lost as heat in the wiring, potentially reducing the overall heat output in the server room, contrary to the implication that it would become significantly hotter.

While the initial thought might be that changing to a higher voltage could generate more heat, the lower current actually results in lower resistive losses. This change is beneficial because it allows for more efficient power distribution, less strain on electrical infrastructure, and reduced cooling requirements