Power delivery system

A method comprising:

• selectively coupling a collector device of a vehicle with a delivery device coupled with an off-board power source;
• separately conducting a positive potential and a negative potential between the power source and the vehicle via different contacts of the collector device in a first mode of operation;
• separately establishing a grounding connection and a communication pathway between the power source and the vehicle via the different contacts of the collector device in the first mode of operation;
• switching the different contacts from the first mode of operation to a second mode of operation;
• and
• separately conducting the positive potential, an additional amount of the positive potential, the negative potential, and an additional amount of the negative potential between the power source and the vehicle via the different contacts of the collector device in the second mode of operation.