Do not overload the welding machine during use; otherwise, it may overheat and damage the machine or cause a fire. Overloading can also damage the insulation, potentially leading to electric shock due to leakage.
Prior to welding, it is essential to inspect the welding machine equipment and tools for safety, such as 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 cables.
Prior to welding on the equipment, the grounding or neutral wire should be disconnected, and then reconnected after welding is completed.
(3) Prior to welding operations, it is essential to inspect the work environment, eliminate hazardous factors, and assign a supervisor. When other personnel and related facilities are nearby, protective measures such as screens and safety distances must be employed to ensure safety. When welding at heights, a safety harness must be worn.
(4) 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 high, 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 the welding machine joint and replacing the welding parts, if it's necessary to reconnect the secondary circuit, the work should be transferred to a different location, the welding machine maintenance should be suspended, or work should be stopped for the day. Power must be disconnected before proceeding with the operation.
(7) Welding machines should be placed in a rainproof and well-ventilated area. Flammable and explosive materials are prohibited from being stored in the welding site.
(8) The primary side power cable of the communication arc welder 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 sheath and copper-core multi-strand soft cables. The cable length 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.
Outdoor welding machines should be placed in a dry location and covered with a shed.
(12) The casing of the welding machine should be reliably grounded and should not be grounded in series with multiple units.
(13) The thermal insulation resistance value of each wire winding on the welding machine 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 holes exposed on the housing should be fitted with protective covers.
(15) The power switch for the welding machine should be set separately; the power supply for a DC welding machine should be controlled by a starter.
