Abstract: A flat multiconductor cable assembly for use in undercarpet wiring systems for ring-main installations has interconnections selectively made among cable conductors such that a continuous two-wire loop is provided which is accessible through commonly disposed ends of the conductors. System wiring employs such internal loop flat cable for connection to power mains and employs secondary flat cables for connection between the internal loop cable and outlet receptacles.

Abstract: An installation kit for wiring systems includes flat multiconductor cable having a displaceable overlying shield and a connection guide adapted for receiving first and second cables in mutually overlapped, shield-displaced relation and limiting connection of conductors to preselected connection zones.

Abstract: A cable assembly for use in undercarpet wiring systems has a flat multiconductor cable encased in electrical insulation and an electrically conductive shield overlying the cable insulation, extending lengthwise with the cable and having successive extents which are respectively unsecured and secured to the cable. Electrical connection of the shield to the cable ground conductor is made redundantly at each such secured extent of the shield whereby physical continuity of the shield may be interrupted without interrupting electrical continuity of the shield to ground. Folded cable assemblies and methods for folding are set forth which facilitate cable directional change in wiring systems.

Abstract: An installation kit for wiring systems includes flat multiconductor cable, insulation piercing connectors for electrically joining cable conductors and insulator-spacer elements, for disposition overlying a cable and insulatively spacing the connectors from the cable shield. The cable shield is in displaceable overlying relation to the cable conductors to permit installation of connectors and spacers and remains electrically connected to the cable ground conductor.