10.F.03 Welding Cables and Connectors.
- Cables must be completely insulated, flexible, capable of handling the maximum current requirements of the work in progress, and in good repair. Cables in need of repair must not be used.
- Welding cables must be inspected for wear or damage before each use. Cables with damaged insulation or connectors must be replaced or repaired to achieve the same mechanical strength, insulating quality, electrical conductivity, and water tightness of the original cable. Cables containing splices or repaired insulation within a minimum distance of 10 ft (3 m) from the end of the cable to which the electrode holder is connected must not be used.
- Where it becomes necessary to connect or splice lengths of cable together, insulated connectors of a capacity at least equivalent to that of the cable must be used. When connections are affected by cable lugs, they must be securely fastened together to give good electrical contact and the exposed metal parts of the lugs must be completely insulated. The joining of lengths of cable must be accomplished by methods specifically intended for that purpose and connection methods must provide insulation adequate for the service conditions.
10.F.04 The frames of arc welding and cutting machines must be grounded either by a third wire in the cable connecting the circuit conductor or by a separate wire that is grounded at the source of the current.
10.F.05 Neither terminal of the welding generator must be bonded to the frame of the welder.
10.F.06 Pipelines containing gases or flammable liquids or conduits carrying electrical conductors must not be used for a ground return circuit.
10.F.07 Circuits from welding machines used for other than welding tools must be grounded.
10.F.08 Welding supply cables must not be placed near power supply cables or other high-tension wires.
10.F.09 Welding leads must not be permitted to contact metal parts supporting suspended scaffolds.
10.F.10 Switching equipment for shutting down the welding machine must be provided on or near the welding machine.
10.F.11 Equipment must be shut down when the leads are unattended.
10.F.12 Arc welding and cutting operations must be shielded by noncombustible or flameproof screens to protect employees and other visitors from the direct rays of the arc as in Section 10.A.04.
10.F.13 Coiled welding cable must be spread out before use.
Knowledge Check Choose the best answer for the question.
10-7. Which of the following is required for arc welding and cutting frames?
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