Prevention and control measures for safety of powe

2022-08-05
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Preventive and control measures for construction power safety

1 the construction site must be equipped with full-time electricians on duty. Low voltage electricians shall not engage in high-voltage operation, and learning electricians shall not operate independently. Non electrician operation is strictly prohibited

2. Before the commencement of the project, technicians or electricians shall, according to the specifications and in combination with the actual situation of the project, support the advantageous backbone enterprises in the industry to prepare the temporary power construction organization design with the brand, technology, capital and other elements as the link, and report to the engineering department for filing

3 the construction procedure of temporary power utilization project shall follow: construction organization → disclosure → installation → commissioning → acceptance → delivery → inspection and rectification → maintenance → completion and removal

insulated conductors or cables must be used for the four overhead lines. Why is there error in the use of the pressure testing machine when the pole is tilted? It shall be greater than half of the pole head, the angle and terminal pole shall be inclined by one pole head in the opposite direction of the line, and the deflection of the cross arm shall not be greater than 1% of its length

5 the angle between stay wire and pole of overhead line should be 45 °, and the buried depth of stay wire chassis should not be less than 1.2m. The included angle between the pole and the main pole should be 30 °. The buried depth of the pole should not be less than 1m. The sag of the conductor within the same span should be consistent. The down lead on the pole should pass through the protective tube, which should be made into a waterproof elbow

6 cables shall not be laid along the ground or foundation pit. When laying underground: when crossing the road and buildings, protective pipes must be worn. The inner diameter of the protective tube shall not be less than 1.5 times of the outer diameter of the cable. The two ends of the protective tube passing through the road shall be insulated and fixed with the cable. Cable direction marker posts shall be set every 20 meters at the turning and straight section

7 the cable should not be laid along the steel pipe. 8. During the test process, the scaffold and other metal structures should be isolated and fixed with insulators or laid through pipes if necessary. It is forbidden to use bare metal wires to tie and reinforce cables

8 indoor wiring in living quarters, offices, etc. must be fixed with insulators, and protective tubes must be threaded through the wall

9 the power lines used in underground works must be rubber sheathed cables and laid overhead along the wall. The erection height should not be less than 2m. Insulators should also be used when fixing

10 do not engage in any lifting operation above or below the high-voltage transmission line. During the hoisting operation near the overhead line, a special person shall be assigned to supervise until the work is completed. The safety distance is: it is necessary to prompt the user to make corresponding correction to the safety parameters during the hoisting test procedure. Perhaps the safety parameters may be updated and set according to the applied sensors. The horizontal safety distance between the side of the rope and the hoisted object and the 10kV High voltage line shall not be less than 2m

11 the power distribution system should be equipped with three-level power distribution, i.e. main distribution box (room) → distribution box → switch box

12 distribution box: main air switch → shunt leakage switch → porcelain plug (porcelain plug may not be added to leakage switch with rated capacity above 100a)

13 switch box: leakage switch → porcelain plug → socket (equipment)

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