A method of producing a seamless, composite tubular product includes centrifugally casting a metal or alloy into a tubular workpiece having an inner diameter. The plug connector includes a housing and a plurality of first and second terminals. The current distributor module or each current distributor module has a housing, a slot formed on a front side of the housing for plugging on an associated circuit breaker, and a first channel which passes through the housing in a transverse direction for accommodating the first main busbar.