Hand-held electric tools used by electricians are used in harsh environments, which require constant movement, high vibration and high noise during use. The power cord is easily damaged by external forces such as delay, resistance, or mechanical kneading, and is damaged, resulting in personal electric shock. In order to reduce incidents, hand-held electric tools should be used accurately.
1. It must be carefully inspected before use, the appearance is not damaged, the switching action is not jammed, the power lead and the shell of the electric device. Use a 500V megohmmeter to measure the resistance between the winding and the housing and the resistance value shall not be less than 0.5 megohm. See the attached table for the resistance value.
2. The maintenance grounding wire of the hand-held electric tool in the metal shell. The power lead is a multi-core soft rubber sheathed cable, and both ends of the grounding maintenance wire should be connected firmly.
3. Hand-held electric things should be used by full-time personnel with knowledge. Relevant operating procedures should be strictly followed during operation.
4. Check the electrical maintenance equipment and mechanical maintenance equipment before use. Its use should be normal. Also note that some of its scrolling is not jam-free.
5. When using Class I hand-held electric things, the user should wear compliant supplies and set up qualified appliances. And adopt corresponding maintenance methods in accordance with the rules, such as equipment leakage maintainers in the power circuit.
When using Class II hand-held electric tools in humid and narrow places, the leakage switch should be installed. The operating current of the electric switch is less than 1.5mA, and the action time is less than or equal to 0.1 second. And the leakage switch should be placed in the container and supervised by a dedicated person.
6. Operation hazards of using hand-held electric tools. The common methods of arm vibration caused by long-term hand-transmitted vibration work include: maintain and maintain things in accordance with the requirements of the manufacturer`s operating instructions; when you can rotate different things, use as much as possible to generate lower vibrations The method of operation; should reduce the occurrence of cold gas and liquid around the operator`s hand; if possible, in cold conditions, the operating handle of the tool should be heated; the shape of the handle in the contact area should be reduced. High pressure things; when you can choose, you should choose things that require small contact pressure (holding force and feed force); use vibration-absorbing gloves; wear gloves when operating to reduce hearing damage.