1. Verify that the power supply connected to the site is in conformity with the electric drill nameplate. Are there leakage protectors connected?
2. The bit and gripper should be adapted and properly installed.
3. Make sure that the switch on the drill is turned on and locked. Otherwise, when the plug is inserted into the power socket, the drill will turn unexpectedly and immediately, which may cause dangerous injury to personnel.
4. If the work place is far away from the power supply, when it needs to extend the cable, it should use enough capacity to install qualified extension cable. Extended cables should be elevated if they pass through pedestrian walkways or measures should be taken to prevent them from being damaged by rolling.