(1) The metal bridge, wire trough and its bracket shall be connected to the grounding (PE) or zero-connecting (PEN) trunk line at no less than 2 places in the whole length.
(2) The two ends of the connecting plate between non-galvanized bridge frames and the two ends of the connecting plate between non-galvanized wire troughs should be connected to the copper core grounding wire, and the minimum cross-sectional area is not less than 4mm2.
(3) The two ends of the connecting plate between the galvanized bridge frame and the connecting plate between the wire troughs are not connected to the ground wire, but the two ends of the connecting plate are not less than 2 connection fixing bolts with anti-loosening nuts or anti-loosening washers.
(4) The bridge frame shall be laid below the flammable and explosive gas pipeline and heat pipeline, and the minimum clear distance from the pipeline shall meet the requirements of Table 6-11.
(5) The bridges laid in the shaft and passing through different fire zones shall have fire blocking measures according to the design requirements.
(6) The bolts between the bridge frame and the bracket, the bolts of the bridge frame connecting plate, are firmly fixed, and the nuts are located on the outside of the bridge frame. .
