A method, system and assembly for transferring electrical power adapted to provide power to a grounded aircraft is provided. The assembly comprises a first and second insulated electrical conductor and a plug body, attached to ends of these conductors. A first contact and a second contact is provided within the plug body, having electrically conductive connections with the first and second conductors. A non conductive support bar disposed at least partially within the plug body separating at least portions of the first contact and the first conductor from the second contact and the second conductor.