... solid polyolefine insulation,Stalpeth sheath HYAT53-Local telephone cable,solid copper conductor, solid polyolefine insulation ... ,jelly filling,Stalpeth sheath HYAT53-Local telephone cable,solid copper conductor, solid polyolefineinsulation,jelly ... ductHYACAerialHYATCable trough,cable trench,ductHYA53Duct,buryHYAT53Bury, duct Table 2:Conductor diameter and number of pairsConductor ...