Answer: 1. For electrical equipment that requires protective grounding, a separate protective conductor should be connected to the protective trunk line or a separate grounding conductor should be connected to the ground electrode;
2 . When the elevator track is used as the grounding trunk line, it should be connected into a closed loop;
3. In the basic grounding network, a galvanized flat iron is led out from the elevator shaft part as the grounding of the elevator track. A flat iron is reserved at the top of the elevator shaft so that the end and end of the elevator track are connected to the flat iron to form a loop and form a grounding.