4. The framework must be drawn with the outer box of the industrial socket, and then the ground shall be excavated according to the drawn framework line. The deep layer is the same thick with the industrial socket.
5. Fix the plastic plate at the bottom of the excavated pit, and then fix the installation box by passing the three cables that have not been peeled off.
6. First strip off the connection between the zero wire end and the socket connection base, and then strip off the connection between the zero wire end of the live line and the socket connection base, and finally strip off the ground connection to connect with the industrial socket grounding wire wiring base.
7. Place the industrial socket carefully in the installation box, fix it and install it.