Composite 4 Core Loop Feeder Cable. Each Core Composed of 7/0.50 mm Bare Copper Conductors, Polyethylene Insulated, Twinned, Jelly Filled, Polyethylene Inner Jacket, Aluminium Laminate Screened, Jelly Filled, PVC Jacketed. The 4 Cores are Cabled Together and Then Overall PVC Jacketed. Used Where Multiple Detector Loops are on the Same Feeder Line.