Electric tool safety operation rules

1. The single-phase power cords of mobile electrical machines and hand-held power tools must use three-core soft rubber cables, and the three-phase power cords must use four-core rubber cables; when wiring, the cable sheath should be inserted into the junction box of the equipment and fixed.

2. Check the following items before using power tools:

(1) The shell and handle have no cracks or damage;

(2) The connection of the protective ground wire or the neutral wire is accurate and firm;

(3) The cables or cords are in good condition;

(4) The plug is in good condition;

(5) The switch action is normal, flexible and free of defects;

(6) The electrical protection device is in good condition;

(7) The mechanical protective device is in good condition;

(8) The rolling sector is flexible.

3. The insulation resistance of the power tool should be measured with a 500V megohmmeter on schedule. If the insulation resistance value between the live parts and the casing does not reach 2MΩ, it must be repaired.

4. After the electrical department of the power tool is repaired, it is necessary to measure the insulation resistance and the insulation withstand voltage test. The test voltage is 380V and the test time is 1 minute.

5. The electrical circuit connecting the electrical machinery and tools should be equipped with a separate switch or socket, and a leakage current activity should be installed as a protector, and the metal shell should be grounded; it is strictly forbidden to connect multiple devices at one gate.

6. The rated leakage operating current of the current-type leakage protector shall not be greater than 30mA, and the operating time shall not be greater than 0.1 seconds; the rated leakage operating voltage of the voltage-type leakage protector shall not be greater than 36V.

7. The control switch of the electronic device should be placed within the reach of the operator. When there is a power failure during rest, work or during work, the switch on the power supply side should be turned off.

8. When using portable or mobile power tools, you must wear insulating gloves or stand on insulating pads; when moving tools, do not carry wires or rolling parts of tools.

9. When using Class III insulated power tools in wet or acid-containing sites and in metal containers, reliable insulation measures must be taken and special personnel should be set up to monitor them. Switches for power tools should be located within the reach of guardians.

10. The disk plane of the magnetic chuck electric drill should be flat, clean and free of rust. When performing side drilling or upward drilling, measures should be taken to prevent the drill body from falling after power failure.

11. When using an electric wrench, the counter torque fulcrum should be firmly secured and the nut should be fastened before starting.