一、網絡機柜需要接地嗎
需要。
根據國家建筑規范,不管是否采用了屏蔽布線系統,綜合布線系統所用的網絡機柜都要(yao)求接地(di)。網絡機柜之所以要(yao)接地(di)線,主要(yao)是為了(le)保證機房內工(gong)作人員(yuan)的(de)人身安全,同時起到保障設備(bei)安全,限制各火(huo)線對地(di)電壓不超過250V,減(jian)輕高壓竄入低壓電路的(de)危險。
二、網絡機柜如何接地線
網絡機(ji)(ji)柜常(chang)用(yong)的接地(di)(di)(di)(di)方案是在弱(ruo)電(dian)機(ji)(ji)房(fang)、弱(ruo)電(dian)間、電(dian)信間中建立獨(du)立的弱(ruo)電(dian)接地(di)(di)(di)(di)導線(xian),該導線(xian)在建筑(zhu)物的總接地(di)(di)(di)(di)樁上與(yu)其他接地(di)(di)(di)(di)導線(xian)共地(di)(di)(di)(di),形成(cheng)建筑(zhu)物內(nei)的聯合接地(di)(di)(di)(di)體,主要接三條地(di)(di)(di)(di)線(xian):防雷地(di)(di)(di)(di)線(xian)、保護(hu)地(di)(di)(di)(di)線(xian)、直流邏輯地(di)(di)(di)(di)線(xian):
1、防(fang)雷(lei)地(di)線一般使(shi)用建筑(zhu)物的防(fang)雷(lei)地(di)線。在高落(luo)雷(lei)區(qu)要(yao)構筑(zhu)單獨的避雷(lei)鐵(tie)塔。
2、保護地線(xian)(xian)(xian)(xian)一(yi)般指(zhi)零線(xian)(xian)(xian)(xian):我國(guo)現在(zai)電(dian)力系統(tong)一(yi)般采用三相四線(xian)(xian)(xian)(xian)制(zhi)供電(dian),也就(jiu)是進戶線(xian)(xian)(xian)(xian)有(you)三根(gen)火線(xian)(xian)(xian)(xian)(相線(xian)(xian)(xian)(xian))一(yi)根(gen)零線(xian)(xian)(xian)(xian)。零線(xian)(xian)(xian)(xian)在(zai)變壓器中(zhong)性(xing)點接(jie)地。機房內配(pei)電(dian)箱外(wai)殼以(yi)及空調、新風機外(wai)殼和零線(xian)(xian)(xian)(xian)相接(jie)作為保護地線(xian)(xian)(xian)(xian)。計算機外(wai)殼不要和零線(xian)(xian)(xian)(xian)相接(jie)。
3、機房(fang)和大型(xing)設備(bei)安裝時(shi)一般要求的地線指得是(shi)直流邏(luo)輯地線。
在同一(yi)個(ge)網(wang)絡(luo)機柜內,往往會(hui)有數個(ge)乃(nai)至數十個(ge)屏(ping)蔽(bi)配線(xian)(xian)架,它們應采用星型(xing)結(jie)構完成接(jie)地(di)(di)(di)(di)連接(jie)。屏(ping)蔽(bi)配線(xian)(xian)架的(de)(de)(de)接(jie)地(di)(di)(di)(di)應直接(jie)接(jie)到機柜的(de)(de)(de)接(jie)地(di)(di)(di)(di)銅排上,形成機柜內的(de)(de)(de)星型(xing)接(jie)地(di)(di)(di)(di),其(qi)接(jie)地(di)(di)(di)(di)線(xian)(xian)建(jian)議使用6mm2以上的(de)(de)(de)網(wang)狀接(jie)地(di)(di)(di)(di)線(xian)(xian),利用其(qi)表面積(ji)大的(de)(de)(de)特(te)點提高線(xian)(xian)纜的(de)(de)(de)高頻特(te)性。為了防止網(wang)狀接(jie)地(di)(di)(di)(di)線(xian)(xian)短路,在接(jie)地(di)(di)(di)(di)線(xian)(xian)外應套塑料(liao)軟管(guan)。
三、網絡機柜接地規范要求
1、地線(xian)安裝時要求接地面(mian)積不能小于1m2。
2、接(jie)地(di)點距離建筑物(wu)大于(yu)1m。
3、根據地(di)質情況決(jue)定接地(di)體所使用的材質,使用面(mian)積為(wei)1㎡厚度為(wei)3mm以上的銅板最好,如為(wei)減少(shao)造(zao)價或找不到(dao)銅板,可以使用直徑1.5英寸(cun)、長2.5m的鍍鋅鐵管代(dai)替(ti)。