Overloading is strictly prohibited during the operation of welding machines, as it may cause the machine to overheat and be destroyed, or even lead to fires. Overloading can also damage insulation, potentially causing electric leakage and electric shock accidents.
Prior to welding, it is essential to inspect the welding machine and tools for safety, including the grounding of the welding machine and the integrity of all connection points, as well as any damage to the insulation sheath of the welding cable.
Prior to welding on the equipment, the grounding or neutral wire should be disconnected, and then reconnected after welding is completed.
Prior to welding operations, inspect the work environment, eliminate hazardous factors, and assign a supervisor. When other personnel and related facilities are nearby, use shielding and safety distances to ensure safety. When welding at heights, a safety harness must be worn.
When changing welding rods, the welder should wear insulated gloves.
(5) When welding inside metal containers, on metal structures, or in other confined workspaces, the risk of electric shock is significantly higher, and special protective measures must be taken. This includes using rubber mats, wearing leather gloves, and donning insulating shoes to ensure electrical insulation between the welder's body and the welding piece. The use of simple welding clamps without insulating casings is strictly prohibited.
When changing welding machine connections and replacing welding parts that require a secondary circuit to be reconnected, it is necessary to transfer work locations, pause welding machine maintenance, or stop work before the end of the shift. Power must be disconnected before any operations can be performed.
(7) Welding machines should be placed in a rainproof and well-ventilated area. No flammable or explosive materials are allowed to be stored in the welding site.
(8) The primary power cable of the arc welding machine must be well insulated, should not be dragged on the ground, and its length should not exceed 5 meters. A protective cover must be installed at the entry point.
(9) For secondary wiring of welding machines, it is recommended to use YHS-type rubber sheathed cables with copper-core multi-strand flexible cables. The length of the cable should not exceed 30 meters.
(10) Welding machines should be centrally located by area or floor level as needed for construction and should be numbered.
(11) Outdoor welding machines should be placed in a dry location and protected under a shed.
(12) The casing of the welding machine should be reliably grounded, and not be grounded in series with multiple units.
(13) The thermal insulation resistance value of each wire spool to the welding machine housing must not be less than 0.4MΩ.
(14) The exposed conductive and rotating parts of welding machines should be covered with safety guards. After the regulator of a DC welding machine is removed, the exposed holes on the casing should be fitted with protective covers.
(15) The power switch of the welding machine should be separately set; the power supply of the DC welding machine should be controlled by a starter.
