high-voltage red electrical cable reels that can carry up to 30000 volts to connect electrical substations

20kv 30kv are4h1rx bobbin cable reel cables cabling coil conductor copper electric electrical electricity electromagnetism enel energy h1rx h1rxred20kv high tension voltage highvoltage line hv medium plastic power pvc red reels roll spool volt wire wires wiring 30000 volts substations city transmission distribution infrastructure 20000