Now the role of cable bridge is becoming more and more abundant. The next edition of Jinan cable bridge will tell you about a series of requirements that should be met when the design allows the use of bridge system to form a grounding trunk circuit.

金属电缆桥架及其支架引入或引出的金属电缆导管必须接地（PE）或接零（PEN）可靠，且必须符合下列规范:

The metal cable conduit introduced or drawn from the metal cable bridge and its support must be reliable in grounding (PE) or zero connection (PEN), and must conform to the following specifications:

(1) 金属电缆桥架及其支架全长，与接地（PE）或接零（PEN）干线相连接不小于2处，使整个桥架为一个电气通路。

(1) The full length of the metal cable bridge and its bracket shall be connected not less than two main lines of grounding (PE) or zero connection (PEN), so that the whole bridge is an electrical path.

(2) 非镀锌电缆桥架间连接的两端跨接铜芯接地线，接地线更小允许截面积不小于4mm2。

(2) Copper-cored grounding wires are spanned at both ends of the non-galvanized cable bridge, and the minimum allowable cross-sectional area of the grounding wires is not less than 4 mm2.

(3) 镀锌电缆桥架间连接板的两端可不跨接接地线，但连接板两端不少于2个有防松螺帽或防松垫圈的连接固定螺栓。

(3) The two ends of the connecting plate between galvanized cable bridges can not span the grounding wire, but there are no less than two connecting bolts with anti-loosening nuts or washers at both ends of the connecting plate.

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