Flame-retardant flat electrical cable

A connector assembly comprising:

• a flat electrical cable extending longitudinally along a length of the cable, comprising a plurality of conductor sets extending along the length of the cable, each conductor set comprising one or more insulated electrical conductors, each insulated conductor comprising a central conductor surrounded by a first dielectric material, the plurality of conductor sets comprising a middle conductor set disposed between two other conductor sets and an edge conductor set disposed proximal to a longitudinal edge of the cable, wherein the first dielectric material of each insulated conductor of the edge, but not the middle, conductor set comprises an intumescent flame retardant material;
• and
• a plurality of contact pads arranged in a row and comprising a plurality of middle contact pads disposed between a pair of edge contact pads disposed at opposing ends of the row;
• wherein an insulated conductor of the edge conductor set is terminated at a middle contact pad, and an insulated conductor of the middle conductor set is terminated at an edge contact pad.