Cross arms shall be set for wire erection and fixed with insulators
.
The span of overhead lines shall not be greater than 35m, the distance between lines shall not be less than 0.3m, the distance between two conductors close to the pole shall not be less than 0.5m, and the distance between overhead lines and adjacent lines or fixtures shall meet the requirements..
. 
It is forbidden to directly insert the conductor core of electric equipment and electric tools into the socket or hang it on the switch and leakage protector
.
The submersible pump must be equipped with a lifting rope
.
The overhead line must adopt insulated conductor and be erected on a special electric pole
.
The height of indoor non buried exposed trunk line from the ground shall not be less than 2.5m
. 
2
When buried cables cross buildings (structures), roads, places vulnerable to mechanical damage and medium corrosion, protective sleeves must be added to ensure that the gap between cables and pipes is well sealed to avoid rainwater
.
When the power line crosses the railway, it shall pass under the steel rail
.
9
.
The safety of temporary power use on the construction site is a key point of on-site safety protection
. 
The electric pole shall adopt reinforced concrete pole or wooden pole, and its quality and buried depth shall meet the requirements
.
Temporary power must be configured according to the requirements of three-phase five wire system
.
The wire connection shall be firm and reliable without looseness
. 
13
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It is forbidden to pull and connect wires without permission in the dormitory, and it is forbidden to hang clothes and other things on the wires
. 
1
. 
8
. 
5
.
Armored cables shall be used for underground direct buried cables, and the cable burial depth shall not be less than 0.7m, and line direction signs and warning signs shall be set at certain intervals
.
In case of any potential safety hazard of power consumption such as damage to power supply lines, distribution boxes, switches and other electrical equipment, it shall be reported to professional electricians and competent personnel
.
15
.
When transporting materials on the ground or floor, do not step on the wire; Do not press the trolley on the wire when stopping and releasing the trolley and stacking the formwork, springboard and reinforcement
. 
It is strictly prohibited to erect wires at scaffolds, trees, etc
. 
11
. 
10
.
Non professional electricians shall not deal with it without permission and shall not touch it
.
Operators shall wear insulating rubber shoes, gloves and other labor protection articles when lifting the submersible pump
.
3
. 
12
.
It is strictly prohibited to set up along the ground, and it is strictly prohibited to set up on trees, scaffolds and other facilities
.
Electricians need to inspect distribution lines frequently, and wrap damaged and exposed cables with insulating tape in time; Insulation and isolation measures shall be taken for exposed switches and terminals to prevent accidental touch and electric shock
.
The cable line shall be laid overhead or buried
.
Indoor wiring shall be laid with porcelain bottle, porcelain (plastic) clamp, embedded insulation slot, through pipe or steel cable according to the wiring type
.
6
.
It is strictly prohibited for operators to drag cables
.
Today, I’d like to introduce some safety precautions for temporary power use on the construction site – distribution box and switch box
.
4
. 
If the operation is stopped in the middle, special personnel shall be assigned to watch
.
16
.
14
.
7
. 
The cables in three-phase five wire system must adopt five core cables, including three-phase working core wires and core wires used as working zero wires and protective zero wires
.
