A system comprising at least: a head having a non-cylindrical cross section; a tail having a symmetrical structure and a core for electrically connecting the head and the tail; and wherein the head is electrically connected to a first power cord , the first power cord carrying electricity into the head and the tail is electrically connected to a second power cord , the second power cord carrying electricity out of the tail; characterized in that the tail is able to rotate with respect to the head and the core maintains electrical continuity when the tail is rotating; when the head is laid on a surface the head creates sufficient counter torque to prevent the head from spinning as a result of the second power cord rotating, the system further comprises at least a central conductor rod having a head end and a tail end; a first conductor tube having a head end and a tail end; a second conductor tube having a head end and a tail end; a head assembly (119.1) of a core being enclosed in the head, the head assembly including at least a rod head bushing that is connected to the head end of the central conductor rod for conducting electricity while reducing contact resistance; a bearing having an inner disc and an outer disc , the inner disc being connected to the rod head bushing, wherein the inner disc rotates with respect to the outer disc; a first bushing being connected to the head end of the first conductor tube; a second bushing being connected to the head end of the second conductor tube; a first spacer being placed between the rod head bushing and the first bushing to prevent conduction of electricity; a second spacer being placed between the first bushing and the second bushing to prevent conduction of electricity; a core housing for enclosing at least the head ends of central conductor rod, first conductor tube, and second conductor tube, and the rod head bushing, the first bushing, the second bushing, the first spacer, and the second spacer, wherein the outer disc of the bearing is tightly attached in the core housing, wherein the core housing is tightly affixed in the head; three contact plates for maintaining continuity of electricity, the three contact plates being affixed to the core housing and kept in contact with the rod head bushing, the first bushing, and the second bushing, respectively; a tail assembly of the core being enclosed in the tail, the tail assembly including at least a rod tail bushing being connected to the tail end of the central conductor rod, wherein the rod tail bushing connects the central conductor rod to a tail end stub , the tail end stub being tightly affixed in the tail; a third bushing being connected to the tail end of the second conductor tube; a fourth bushing being connected to the tail end of the first conductor tube; a third spacer being placed between the third bushing and the fourth bushing prevents conduction of electricity; a fourth spacer being placed between the fourth bushing and the rod tail bushing prevents conduction of electricity; and wherein the central conductor rod, the first conductor tube, and the second conductor tube are concentric, wherein the head includes a first electrical connector being connected to the three contact plates, wherein the tail includes a second electrical connector being connected to the rod tail bushing, the third bushing, and the fourth bushing. <EOS>