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照明电缆敷设有啥要求?

浏览:54次 | 提问时间: 06-23 02:39
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3个答案
憎厌她 06-23 02:40

管内穿线及电缆敷设A使用导线其额定电压应大于线路的工作电压。导线的绝缘应符合线路的安装方式和敷设的环境条件。导线的截面应能满足供电和机械强度的要求。B配线时应尽量避免导线有接头,因为常常由于导线头不好而造成事故。接头,必须采用压接和焊接。导线连接和分支处不应受机械力的作用。穿在管内的导线,在任何情况下,都不能有接头。必要时,尽可能将接头放在接线盒或灯头盒内。C电缆敷敷设前应进行下列检查:支架应齐全、油漆完整;电缆型号、规格、电压应符合设计要求;电缆绝缘良好。D在三相四线制系统中使用的电力电缆,不应采用三芯电缆另加一根单芯电缆或导线,电缆金属护套等作中性线的方式。E三相系统中使用的单芯电缆,应组成紧贴的三角形排列,并且每隔1m应用绑带扎牢。F并联运行的电力电缆,其长度应相等。G电缆敷设时,在终端头和中间接头处应留有备用长度。直线段尚应在全长上留有少量裕度,并作波浪形敷设。H电缆的弯曲半径不应小于20D。I电缆敷设,电缆应从盘的上端引出,应避免电缆在支架上及地面摩擦拖拉。电缆上不得有未消除的机械损伤(如铠装压扁、电缆绞拧、护层折裂等)。J电缆的排列,当设计无规定时,应符合下列要求:K电力电缆和控制电缆应分开排列;当电力电缆和控制电缆敷设在同一侧支架上时,应将控制电缆敷设在电力电缆的下面。L电缆敷设完毕后,应及时清除杂物,盖好盖板,必要时,尚应将盖板缝密封,以免水、汽、油、灰等侵入。M电缆穿管时,每根电力电缆应单独穿入一根管内,但交流单芯电力电缆不得单独穿入钢管内。N所选用的导线应符合设计要求O导线无扭结、死弯和绝缘层损坏等P连接、剥开绝缘层时线芯无损伤、接头用绝缘带包缠,应均匀、严密,并不低于原绝缘强度。

心在说谎 06-23 02:49

首先电力电缆是指以传输电能为目的的电缆,有电压等级之分,有不同绝缘之分,有单芯多芯之分等等电力电缆敷设是指将电缆放置到预先设计好的路径上,可以是地埋,可以使穿管涵,可以是放到桥架中,也可以是在水下等等,电力电缆敷设工作还包括电缆附件的安装,

她是光芒亦能暖阳 06-23 02:57

电缆如直埋敷设,要注意土壤条件,一般建筑物下电缆的埋设深度不小于0.3米,较松软的或周边环境较复杂的,如耕地、建筑施工工地或道路等,要有一定的埋设深度(0.7~1米),以防直埋电缆受到意外损害,必要时应竖立明显的标志。

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