Abstract: A conduit includes an elongate member with an outer surface and an inner surface defining an inner passage for enclosing one or more electrical signal conductors therein, and an electromagnetic shield disposed coaxially with the elongate member to block electromagnetic radiation emitted by the one or more electrical signal conductors.

Abstract: A conduit system comprises a plurality of elongate channels, each having three walls, one open side, and two open ends; a plurality of coupling devices, each adapted to be disposed between a pair of adjacent channels to couple their adjoining ends together to form a conduit with two open ends; a plurality of first covers, each adapted to be disposed over the open side of one or more channels and to be removably attached thereto by a locking device disposed within the respective channel and adapted to be operated only from within the channel; and at least one second cover adapted to be disposed over the open side of one or more channels and to be removably attached thereto by a locking device disposed within the respective channel and adapted to be remotely operated by an elongated member extending through one of the open ends of the conduit.