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.

金屬電纜橋架及其支架引入或引出的金屬電纜導(dǎo)管必須接地（PE）或接零（PEN）可靠，且必須符合下列規(guī)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) 金屬電纜橋架及其支架全長(zhǎng)，與接地（PE）或接零（PEN）干線相連接不小于2處，使整個(gè)橋架為一個(gè)電氣通路。

(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) 非鍍鋅電纜橋架間連接的兩端跨接銅芯接地線，接地線更小允許截面積不小于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) 鍍鋅電纜橋架間連接板的兩端可不跨接接地線，但連接板兩端不少于2個(gè)有防松螺帽或防松墊圈的連接固定螺栓。

(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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