I'd like to know what type of wire/specs. for a 3 phase high power cable that can handle a 41.6KVa that will be buried under the ground? The voltage will be a 220 volts in 60 Hz. could you show me how to calculate or any charts are really appreciated.
There's not enough information in your question to give an exact answer. Figure the highest current in any of the phases assuming that your load may not be perfectly balanced or it may have a nonlinear current waveform. That will establish the minimum size of the conductors. Another factor to consider is the maximum allowable voltage loss at full current. You also need to know if voltage sags due to startup or inrush currents will be a problem. A long cable will need to have larger conductors to keep the losses within your acceptable range. Don
220V is phase voltage. Then line voltage will be 3^-2 *220 =381V.The current will be 63A.(41.6/3*220 ).The specification of cable is 3phase 4wire 400V. 50mm^2(if aluminum) or 25mm^2(copper) UG cable . If neutral wire is not required, cable will be 3 wire type.
