1. An electrical filtering system for use with an industrial machine, the system comprising:a power center including a transformer and a ground fault relay;
a first motor electrically connected to the power center;
a first variable speed drive connected to the first motor, the first variable speed drive configured to vary the speed of the first motor; and
a first common mode choke connected in a series-type connection between the power center and the first variable speed drive, the first common mode choke configured to suppress a ground current induced by the first variable speed drive, wherein the common mode choke includes a plurality of windings, each winding having a first end coupled a power supply line of the power center and a second end coupled to the variable speed drive.