Groove type cable tray grounding points:

　　1、橋架系統(tǒng)應(yīng)具有可靠的電氣連接并接地（只對(duì)金屬橋架）。

　　1, the bridge system should have reliable electrical connection and grounding (only for metal bridge).

　　2、當(dāng)允許利用橋架系統(tǒng)構(gòu)成接地干線回路時(shí)應(yīng)符合下列要求。橋架端部之間連接電阻應(yīng)不大于0.00033歐姆，接地孔應(yīng)清除絕緣涂層。在1KV及以下中性點(diǎn)直接接地系統(tǒng)中，受電設(shè)備的接地與系統(tǒng)中性線接地相連。裝有處動(dòng)切斷供電裝軒時(shí)，橋架的級(jí)長(zhǎng)方向金屬橫截面積應(yīng)不小于規(guī)定值。

　　2, when allowed to use bridge system grounding main circuit, shall meet the following requirements. Connection between the bridge end resistance should be no greater than 0.00033 ohms, grounding insulation coating shall be removed. In the neutral point grounding system directly 1 kv and below, from electrical equipment grounding connected to the neutral grounding system. Move to cut off the power supply is installed with a place porch, prefect direction of bridge metallic cross-sectional area shall be not less than the specified value.

　　3、沿橋架全長(zhǎng)另敷設(shè)接地干線時(shí)，每段（包括非直線段）橋架應(yīng)至少有一點(diǎn)與接地干線可靠連接。

　　3, along the bridge span laying grounding line, other (including the straight segment) for each bridge should be at least a little and reliable grounding line connection.

　　4、對(duì)于振動(dòng)場(chǎng)所，在接地部位的連接處應(yīng)裝置彈簧圈。

　　4, for vibration place, in the joint of ground parts should be spring coil.

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