Depending on the server you have the power requirements can vary significantly. Generally speaking, 110 Watts of power = 1amp. So if you have a 1100 Watt power supply on 110V power, you will need 10 Amps at full load, BUT you can not run the circuit at 100% load 24×7 or it will over heat and cause problems…so you have to factor this by 80% to keep things running at optimal performance. With this in mind, a 10Amp / 110V power circuit will handle about 900 Watts in an optimal setting.
If you have 2 x Cointerra Terraminer IV machines each with 2 x 1100 Watt power supplies (4400 total Watts at full power), you would need a single 30Amp / 208V power circuit so they can run at 100% capacity in an optimal environment.
This circuit would provide ~6300 Watts at full load and ~5100 Watts at optimal use. We can provide up to 3 x 30Amp / 208V cirucits in a single cabinet, so in this scenario you could have up to 6 machines in a standard 42U cabinet.