To transmit the shielding potential of an electric cable that is connected to a circular connector and surrounded by a braided shield to a mating connector, a circular connector includes a shield transfer element comprising an insulation displacement connector, a transfer contact and a spring bow in the connector housing of the circuit connector. The spring bow contacts the electrically conductive screw cap arranged on the outside of the connector housing through an opening provided in the connector housing while the transfer contact contacts a neutral wire of the circular connector in the center of the circular connector. The braided shield is connected to the shield transfer element by the insulation displacement connector.

A wiring block and cover shell arrangement for electric connector in which the wiring block has two smoothly arched bearing walls perpendicularly extended from the front surface of the base thereof and equally spaced from the center of the base at two sides, two sets of parallel crevices symmetrically formed in the bearing walls and respectively cut through the height of the bearing walls to the base, and two sets of slots respectively cut through the height of the bearing walls and front and back sides of the base across the crevices for accommodating a respective wire clamp to fasten the insulated wires of the twisted pairs of a cable, maintaining an equal delay skew at each twisted pair of the cable.

A case that houses a circuit component includes a frame along a peripheral edge of a circuit board, and a cover assembled to the frame so as to cover the circuit board, and connectors, facing an outer peripheral side of the frame are provided in the frame. In corresponding surfaces of the cover and each of the connectors, a first rib, a second rib, a first rib receiving groove, and a second rib receiving groove are formed that can regulate passage of a liquid in clearances between the connectors and the cover by fitting of protrusions and recesses. This prevents or limits a liquid outside the frame from entering the frame through the clearances between the connectors and the cover.

An electrical connector receptacle housing is provided that includes protrusions in the housing's contact assembly receiving area. The location of each protrusion corresponds to a location of a well formed in a contact assembly between dual beams of ground contacts. When the contact block is received in the housing, each protrusion is received in a corresponding well. The protrusions may be sized to provide a snug fit as the contact block is received in the receptacle housing. The protrusions thus help minimize the movement of the contact block.