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电缆输送机敷设时应注意如下事项:
( 1) 电缆输送机敷设应有波浪形。多根电缆敷设时, 应先敷设规格最大的电缆, 依次下沟。高压电缆与低压电缆交叉敷设时, 高压电缆要放在低压电缆下面, 其距离不应小于500 mm。
( 2) 电缆接头两端应留有1. 5 mm 左右的余隙, 以备检验, 如果发现受潮可截去一段。电缆引入建筑物、引上电杆和中间接头的两端也应留有余量, 以便有故障时修理备用。
( 3) 电缆引入建筑物应穿在保护管中, 管口要用麻带填满, 并用沥青或粘土封口, 以防水分渗入。
( 4) 沿斜坡或垂直敷设油浸纸绝缘电缆时,由于电缆中的浸渍剂会流动, 因此电缆两端的位差不能超过规定的数值。
( 5) 各种电缆转弯时, 曲率半径不允许过小,否则会影响电缆寿命和使用安全。
( 6) 电缆敷设完毕后, 应沿线路进行整理, 然后在电缆上面覆盖100 mm 厚的细砂土, 盖上电缆盖板, 并每隔20 m 左右及终端、转弯处竖立电
缆标志牌。最后对电缆沟覆土, 覆土要高出地面200 mm 左右, 以防松土沉陷。
When the cable laying should pay attention to the following items:(1) the cable laying should have wavy.Dogan cable laying, should first specification's largest cable laying, in the ditch.High voltage cables and low voltage cable, cross high voltage cable should be placed below the low voltage cable, the distance should be not less than 500 mm.(2) on both ends of the cable joint should have 1. 5 mm clearance, for inspection, if it is found that be affected with damp be affected with damp can take a while.Cable entry building, on the ends of the pole and the middle joint should also leave allowance, in order to have a failure repair. Set aside.(3) the cable entry building should wear in protecting tube, tube to fill with hemp belt, with asphalt or clay sealing, to prevent water infiltration.(4) or vertical oil immersed paper insulated cable laying down along the slope, due to the cable in the impregnant will flow, so at the ends of the cable head can not exceed the prescribed value.Around a corner radius of curvature (5) all kinds of cable are not allowed to is too small, otherwise it will affect the cable with life and safety.(6) after the cable laying, shall be carried out along the road, and then in the cable fine sand covered 100 mm thick, covered with cable cover plate, and at intervals of about 20 m erected and terminals, turning on the electricityLine sign.Finally, in cable trench cover earth, covering about 200 mm higher ground, subsidence dirt in case. |
