Even polypropylene tag lines can conduct electricity, especially when wet or dirty, the company says. The 3 lb (1.3kg) link’s rated operating voltage is 25,000 V rms, although it is not lightning proof, the company says. Riggers loop one end of the rope from the load through the top hole of the insulator. They run a second line from the bottom of the insulator to the banksman. The product joins Insulatus’s range of insulating links mounted in crane reeving.