7.7. Assure that welding and cutting equipment is in good operating condition. Welding leads must be joined with only approved insulated couplers (no “C”-clamps, vise grips, etc.). Repair of oxygen and acetylene hoses must be made with proper splices only (no taping). Assure proper grounding procedures have been followed (i.e., grounded at hot work site).
7.8. transmit heat by radiation or conduction to unobserved combustibles.