The Interpretation you are attempting to access, "Grounding precautions for arc welding from suspended scaffolds.", is reserved for subscribers.

Excerpt from "Grounding precautions for arc welding from suspended scaffolds."
Two provisions - - 1926.451(f)(17)(i) and (ii) - - require that suspension cable, or any additional independent lines from the ground, be insulated. Cable lengths of 100 feet or more must be insulated at least 4 feet from the hoist. If there is a cable below the hoist, it also must be insulated. Insulating the cable reduces the hazard of electrocution by preventing arcing due to welding operations.

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Internal Reference: Catcode=A221 Funcode=SZ47