Multi-Conductor Cable. 9873. 9873 - Audio, Control & Instrument, #20-3pr, PO, Indiv. Foil, PVC Jkt, CM. Audio, Control & Instrument Cable, 20 AWG stranded (7x28) tinned copper conductors, polypropylene insulation, 3 twisted pairs, individually shielded with Beldfoil® (100% coverage), 22 AWG stranded tinned copper drain wire, overall PVC jacket