Power tools safety procedures

1, single-phase power supply line of the mobile electrical machinery and hand-held power tools must be used three core soft rubber cable, three-phase power cord must use a four-core rubber cable; the wiring cable sheath should wear into the junction box of the device andto be fixed.


2, power tools before use, check the following:


(1) shell, handle no cracks, no damage;


(2) the protection of the grounding line or zero line connected correctly and firmly;


(3) cable or cord is intact;


(4) plugs intact;


(5) switches for normal operation, flexible, no defects;


(6) Electrical protection devices intact;


(7) Mechanical guards intact;


(8) rotation part flexible.


3, the insulation resistance of power tools on a regular basis with a 500V megger to measure insulation resistance between live parts and enclosure value of less than 2MΩ must repair processing.


4, power tools, electrical part been repaired, must be carried out insulation resistance measurement and dielectric strength test, the test voltage of 380V, test time is 1 minute.


Electrical circuit connected to the electric machinery and tools should set up a separate switch or outlet, and the installation of leakage current operated protective metal enclosure should be grounded; non a gate connected to multiple devices.


6, the current leakage protector rated leakage current shall not be greater than 30mA, operating time shall not be greater than 0.1 seconds; voltage leakage protection rated the residual operating voltage shall not be greater than 36V.


7, the operation of the motor with the switch should be placed in operation reaches parts. When a break from work or work in a sudden power outage, you should cut off the power supply side of the switch.


Use portable or portable electric tools must wear insulated gloves or stand insulation mat; mobile tools, not to mention the rotating part of the wire or tools.


9, in wet or contain acids venues as well as Class III insulation of electric tools in the metal container, the reliable insulation measures must be taken and designated persons guardianship. Electric tool switch should be located in the place of a guardian reaches.


10 magnetic chuck drill disk plane should be smooth, clean, no rust, sidetrack Yang drill, should take measures to prevent the loss of power drill body falling.


11, using the electric wrench, anti-torque fulcrum should rely firmly and really buckle nut before starting.