6
7
8
4
5
4
3
2
1
符号说明：
Symbol Explanation
1-
塑 料 胀 栓
Plastic expanding
bolt
2-
自攻螺钉
Self-tapping bolt
3-
离 墙 管 卡
Wall-away pipe
strap
4-
镀 锌 钢 管
Galvanized steel
pipe
5-
接地管卡
Ground pipe strap
6-
接地线
Ground wire
7-
管接头
Union joint
8-
过路盒
Passing box
2、管内穿线 In-pipe Threading
（1）工艺流程 Technological Process：
（2）选择导线 Select Conducting Wires：
1）根据设计要求选择导线规格及型号。
Select the specification and model of conducting wire according to design requirements.
2）绝缘层抽检：按制造标准，现场抽样检测绝缘层厚度和圆形线芯的直径，线芯直径误差
不大于标称直径的 1％；常用的 BV 型绝缘电线的绝缘层厚度不小于下表规定。
Sampling check on insulating layer: sample to check the thickness of insulating layer and the
diameter of round wire core at the spot according to manufacturing standards. The error of wire core
should not be more than 1% of the equivalent diameter. The thickness of insulating layer in normal BV
insulated wires should not be less than the regulations in the following table.
Serial No.
1
2
3
4
5
6
7
8
9
10
芯线标称截面积（
mm
2
）
Nominal cross-section
area of core (mm
2
)
1.5
2.5
4
6
10
16
25
35
50
70
绝缘层厚度规定值（
mm）
Specified value of
thickness on insulating
layer
0.7
0.8
0.8
0.8
1.0
1.0
1.2
1.2
1.4
1.4
（3）穿带线：穿带线也是检查管路是否畅通，管路的走向及盒、箱的位置是否符合设计及
施工图的要求。
Strip: the strip is also one of requirements to check whether the pipeline is dredged as while as the
direction of pipeline and the position of box accord with designs and construction drawings.
（4）清扫管路 Pipeline Cleaning：
1）清扫管路的目的是清除管路中的灰尘、泥水等杂物。
The aim of pipeline cleaning is to eliminate messes such as dust and sediment.
2）清扫管路的方法：将布条的两端牢固地绑扎在带线上，两人来回拉动带线，将管内杂物
清净。
The method of pipeline cleaning is as following: bind the two ends of cloth on a strip line, two
personnel pull the strip line back and forth and clean the mess in pipe.
（5）放线与断线 Paying-off and Wire Breakage：
1）放线：放线时导线应置于放线架或放线车上。
Paying-off: When paying off, the conductive wire should be placed on paying-off supports or
vehicles.
2）断线：剪断导线时，导线的预留长度应按以下四种情况考虑：
Wire breakage: When cut off, the pre-left length of conductive wire should be considered according
to four situations as following.
A、
接线盒、开关盒及灯头盒内导线的预留长度应为 15cm。
The pre-left length of conductive wire in terminal box, switch box, and lamp-holder box should be
15cm.
B、
配电箱内导线的预留长度应为配电箱体周长的 1/2。
The pre-left length of conducting wire in distribution box should be 1/2 circumference of
distribution box.
C、
出户导线的预留长度应为 1.5m。
The pre-left length of output conducting wire should be 1.5m.
D、共用导线在分支处，可不剪断导线而直接穿过。
At the branch of common conducting wires, the conducting wire may not be cut off to pass through
directly.
（6）管内穿线 Threading in Pipe：
1）钢管(电线管)在穿线前，应首先检查各个管口的护口是否齐整，如有遗漏或破损，均应
补齐更换。
Before threading the steel pipe (wire pipe), firstly check whether shields at every pipe orifice are in
good order. If there is some leakage or damage, all of them should be supplemented and replaced.
2）当管路较长或转弯较多时，要在穿线的同时往管内吹入适量的滑石粉。
If the pipeline is longer or there are more swerves, inbreathe some suitable talc in the pipe while
threading.
3）两人穿线时，应配合协调，一拉一送。
选择导线
穿带线
扫管
放线及断线
导线与带线绑扎
戴护口
穿线
导线接头
线路检查绝缘摇测
8-
43
Lead
selection
Line string
Tube
clearing
Line pulling and
cutting
Colligation of the lead
and line
Protection mouth
wearing
Wiring
Lead tie-in
Line checking and
insulation testing