编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第PAGE38页共NUMPAGES39页第PAGE\*MERGEFORMAT38页共NUMPAGES\*MERGEFORMAT39页电气系统工程5.ElectricSystemProject电气系统安装工艺流程Installationprocess钢管敷设PipeLaying电线管路明敷设时，固定点间距应均匀，固定点设置见下图：Whenadoptedsurfaceconduit,thedistancebetweenfixedpointsshallbeuniform.Thefixedpointspositionasfollows:钢管路沿墙明敷设需进入接线盒时，其固定管卡应采用离墙码，以保证管路进入接线盒平直，如下图所示：Whenthewall-followingpipeadoptedsurfaceconduittoconnectwithjunctionbox,theclampshalluse离墙码toensurethepipehorizontalandvertical.钢管路沿墙明敷设需进入配电箱时，应一孔一管，管道应从配电箱预留敲落孔进入，配管需要煨制灯叉弯或安装支架。不少于两根管路与配电箱连接时，应排列整齐，间距均匀。如下图所示Whenthewall-followingpipeadoptedsurfaceconduittoconnectwithjunctionbox,itmustfollowtherule”onehole,onepipe”.Thepipeshallgothroughthereservedholetojunctionboxwhiletubinglayingneedinstallingsupport.Whentherearemorethan2pipesconnectedwithjunctionbox,thosepipesshallbeneatanduniformspacingasfollows:钢管连接及接地的各种不同方式见下图:Pipeconnectingandgroundingindifferentwaysasfollows:桥架安装CableTrayInstallation槽式水平桥架与支架的横担必须用半圆头的螺栓固定，半圆头向内，以防止螺栓划伤电缆外护层。Adoptingcross-armcupheadbolttofixsupportcross-armonchanneltray,thecup-headsideshallbeinwardincasetheboltwillscratchthecablesheath.c)电缆桥架沿墙垂直安装时，应确保桥架固定牢靠，梯架的固定应采用专用压板。如下图。Wheninstallcabletrayalongwallvertically,makesurethatcabletrayfixedfirmly.Adoptingspecializedplatepinchtofixcableladder.d)槽式电缆桥架沿墙安装时，其固定方式应采用支架或半圆头内膨胀螺栓，固定螺栓的螺杆严禁伸进桥架内，如下图：Wheninstallchanneltrayalongthewall,adoptingsupportorcup-headexpansionbolttofix.ItisforbiddentoThescrewisstrictlyforbiddenintothecabletray.Asfollows:e)水平安装电缆桥架应在结构主梁上安装固定支架，在主梁之间平均分配间隔距离安装吊架，支吊架间隔距离应符合1.5～3m的要求。如下图：Wheninstallcabletrayhorizontally,erectfixedsupportonmainbeam.Themainbeamisdividedintouniformspacingonwhichinstallthesuspendedframe.Thedistancebetweenfixedsupportandsuspendedframeshallbe1.5～3m.Asfollows:f)非镀锌（喷塑、防火）钢制电缆桥架连接时，应在连接板处安装跨接地线，跨接地线安装应注意安装爪型垫圈，以保证接地的电气通路。如下图所示：Wheninstallnon-galvanized(plasticspray,fireproofing)steelcabletray,layingthegroundwirea