(1) When installing high-pressure oil switch, automatic air switch and other switch devices with spring back, the switch should be placed in the off position. (2) When handling the power distribution cabinet, there should be special personnel to command and keep synchronization. When installing multiple switchboards (boxes) in parallel, fingers shall not be placed at the joint of two switchboards (boxes), and connecting screw holes and screws shall not be touched.
(3) Electrical equipment used in the open air should have good rain-proof performance or reliable rain-proof facilities. The distribution box must be firm, complete and tight. It is forbidden to place sundries in the distribution box in use.
(4) When gouging and drilling, you must wear protective glasses, and the hammer handle shall not be loose. Chisels should not curl or crack. When hitting the wall and floor with eyes, no one is allowed to go near the back of the wall or under the floor.
Second, the internal installation
(1) When installing the lighting circuit, it is not allowed to walk or pile materials directly on the batten ceiling or sound insulation board; When walking due to homework, scaffolding must be laid on the big stare blankly wall; 36V low-voltage power supply should be used for lighting in the ceiling.
(2) When working on the scaffold, the scaffold must be paved, and there can be no gaps and probe plates. The materials used should be put into the tool bag and carried with you. Don't throw them around.
(3) When bending on the platform and floor with a human pipe bender, keep your back to the center of the building, and avoid the face when operating. When filling large-diameter pipes and simmering pipes with sand, the sand must be dried with fire before filling. When using mechanical percussion, no one is allowed to stand below, and manual percussion should be staggered up and down. No one can stay in front of the nozzle when the pipe is heated.
(4) When the pipeline passes through the belt line, it is not allowed to make a phone call or blow at the nozzle to prevent the belt line from popping up. When two people thread, they should cooperate and coordinate. Thread high, don't push too hard.
(5) When laying the steel wire rope hanging pipe, the steel wire rope head should be prevented from being punctured. Tighten the steel cable with moderate force to prevent the hanging basket bolt from breaking.
(6) When using casing machine, electric grinding wheel, bench drill and hand electric drill, ensure good insulation and reliable neutral grounding. The leakage protection device is sensitive and effective.
Third, the perimeter installation
(1) Before operation, check tools (milling, pickaxe, hammer, brazing, etc. ) solid and reliable. When digging a pit, slope should be placed according to soil quality and depth.
(2) Traffic arteries or places where people often pass through should be covered in time, and red lights should be set at night to warn them. When the chassis is transported down to into the pit, it is necessary to prevent hands and feet.
(3) When handling poles at the construction site, there should be special personnel to command them. When transporting cars, they must be tied firmly to prevent rolling. When people lift it, they should echo back and forth and coordinate, and the pole should not be too high from the ground to prevent one side from spraining.
(4) When climbing the pole manually, there should be someone to command it. Check whether the tools are firm and reliable before poling (e.g. the fork wood is free of scars, the chain is suitable, and the sliding rope, horizontal rope and steel rope are free of scars). The ground anchor drill should be firm and reliable, and the rope should be applied evenly in all directions. When operating, cooperate with each other, obey the command and balance the strength; No one is allowed to stand under the mechanical upright post and jib, and all live lines above (within the rotating radius of jib) must be cut off.
(5) When the pole moves in place, no one is allowed in the pit. After the pole is erected, the fork wood must be erected before the hook can be removed. Before the pole pit is filled, the fork wood, sliding rope or horizontal rope shall not be removed.
(6) The diameter of pole tip is not less than 13cm, and the buried depth is110+0.6m. The wooden pole shall not be split or decayed, and the root shall be painted with asphalt for anticorrosion. Cement rods shall not be exposed, cracked or twisted in the circumferential direction.
(7) When assembling the cross arm on the pole, the opening of the trap plate should be appropriate, and the force should not be too strong.
(8) When working on a pole, it is forbidden to throw materials up and down. Tools should be put in the tool bag, and the small rope for transferring tools up and down should be firm and reliable. After handing over the tools, stay 3 meters away from the pole.
(9) Tighten the rod horizontally and tighten the clamping bolt. When the bent conductor is tightened, the operator should work outdoors. Temporary pedal bracket installed in tight line mode shall be firm. If you use a bamboo ladder, you must tie it firmly to the pole with a rope. When adjusting the cable, no one is allowed on the pole.
(10) The lead (iron) wire or steel wire rope used for rope tightening shall be able to bear all tensile forces and be firmly connected with the wires. No one can be under the conductor when the conductor is tightened. When the terminal is tight, temporary stay wires should be set in the opposite direction.
(1 1) When stringing, a temporary grounding wire should be set up every 2-3 kilometers on the line, which must be removed before power transmission. Stop climbing poles in the days of heavy rain, heavy snow and gale above level 6.
Fourth, the cable installation
(1) The ground on which the cable shaft is installed must be level. The bracket must be a special bracket with a bottom plane, and it shall not be replaced by a jack. Cable laying must be carried out in accordance with the content of safety technical measures disclosure, and designated personnel command.
(2) When pulling the cable manually, the strength should be even and the speed should be steady, and it is not allowed to jerk and run. People who look at the shaft must not stand in front of the cable shaft. When laying cables, people at corners must stand outside the bending radius of cables. Personnel passing through the pipeline must ensure that their hands are not too close to the nozzle when sending cables; When encountering cables, eyes and body are strictly forbidden to directly face the nozzle.
(3) When laying cables vertically, there must be safety measures to prevent cables from slipping out of control. After the cable is put away, it should be fixed and fastened immediately.
(4) When winding the cable manually, the shaft pusher shall not stand in front of the cable, and their positions shall not exceed the center of the cable shaft. When the cable goes up and down the slope, the iron pipe should be inserted into the central hole of the cable shaft and the rope should be tied to the iron pipe to advance smoothly and slowly. When the cable stops, tighten the cable and brake in time. The gradient of human rolling cable duct shall not exceed 15.
(5) When transporting cables by car, the cables should be placed in front of the front of the car as far as possible (people who follow the car must stand behind the cables) and fixed with wire ropes.
(6) When laying cables in the trench of the electrified distribution room, the switch cabinet where the cables enter must be cut off. And measures such as insulating clapboard should be adopted. When operating beside the switchgear, the safety distance should not be less than1m (switchgear below10kV). If the cable remains for a long time after laying, it must be tied and fixed or measures must be taken. It is forbidden for cables to contact charged bodies.
(7) When digging cable trench, slope should be placed according to soil quality and depth. When constructing cable trenches near traffic lanes or busy areas, railings and signs should be set up, and red sign lights should be set up at night.
(8) When laying cables in tunnels, the temporary lighting voltage shall not be greater than 36V. Before construction, the ground should be cleaned up and the accumulated water should be discharged.
Verb (abbreviation of verb) electrical debugging
(1) The metal shell of the withstand voltage test device must be grounded. If the two ends of the debugged equipment or cable are not in the same place, the other end should be guarded or locked by special personnel, and warning signs should be hung. After the instrument and grounding are checked correctly, the booster can only be boosted after the personnel are evacuated.
(2) Non-impact test of electrical equipment or materials, step-up or step-down should be carried out slowly. If the test is suspended or ended for any reason, the power supply should be cut off first to ensure safe discharge. And short-circuit that high-voltage side of the boosting device to the ground.
(3) When debugging the electric drive system and various high and low voltage switches, remove or lock the relevant switch handles, hang signs, and do not switch on.
(4) Measure the insulation resistance with a shaking table. No one is allowed to touch the tested line or equipment. After measuring the material of capacitive or inductive equipment, it must be discharged. In case of lightning, stop shaking the line insulation.
(5) Open circuit of current transformer is prohibited, and short circuit boosting of voltage transformer is prohibited. When electrical materials or equipment need to be discharged, they should wear insulating protective articles and discharge safely with insulating rods.
Six, the construction site power distribution and maintenance
(1) It is forbidden for a single person to cross obstacles to engage in repair work for on-site high-voltage power distribution equipment, regardless of whether it is live or not.
(2) When there is partial power failure in the high-voltage live area, the human body must keep a safe distance from the live part and be supervised.
(3) In the distribution room, the external high-voltage components and lines should be operated in sequence. When power failure is checked, the grounding wire should be hung, and the operating handle should be locked or hung with signs.
(4) Insulating gloves must be worn when checking electricity, and the electroscope should be used according to the voltage level. Check the electricity of each phase on both sides of the equipment or each phase of the line respectively. After verifying that the equipment or line has no electricity, short-circuit the equipment or line to be repaired to ground.
(5) The installation of grounding wire shall be carried out by two people. Connect the grounding terminal first, then the conductor terminal, and disassemble it in the reverse order. Wear insulating protective articles when disassembling and connecting. After the equipment or line is overhauled, the grounding wire can only be removed after a comprehensive inspection is correct.
(6) Multi-stranded soft bare copper wire with a cross section of not less than 25mm2 and special wire clamps shall be used for grounding wire. It is forbidden to use winding method for grounding and short circuit.
(7) Insulating gloves should be worn when closing the high-voltage switch with insulating rods or traditional mechanisms. When working outdoors in rainy days, in addition to wearing insulating protective articles, the insulating rod should have a rain cover and be supervised by a special person. It is forbidden to close the switch with load.
(8) The metal shell of electrical equipment must be grounded or connected to zero. The same equipment can be grounded and connected to zero. The same power supply system does not allow some equipment to adopt zero connection and the other part to adopt grounding protection.
(9) The rated current of fuse (chip) used in electrical equipment should be suitable for its load. It is forbidden to replace the fuse (chip) with other metal wires.
Seven, the construction site lighting installation
(1) The light source with high luminous efficiency and long service life should be used for the construction site lighting. Workplaces should not only be equipped with local lighting. Where large-area lighting is needed, high-pressure mercury lamp, high-pressure sodium lamp or iodine tungsten lamp should be used, and the clear distance between the lamp holder and combustible materials should be not less than 0.3m When moving iodine tungsten lamp to install metal support, the support should be stable, and the lamps and lanterns must be separated from the metal support with an insulating material of not less than 0.2m
(2) When lighting lamps are installed in the open air, waterproof lamps should be used, and the height from the ground should not be less than 3m. The lighting lamps in the shed and the site can be controlled by branches, and the number of connecting lamps on each lighting branch line should not exceed 10. If it exceeds 65,438+00, each lamp should be fitted with a fuse.
(3) Indoor lighting lamps and lanterns should not be less than 2.4m from the ground. The number of lamps and sockets on each lighting branch line shall not exceed 25, the rated current shall not be greater than 15A, and it shall be protected by fuses or automatic switches.
(4) Generally, the lighting lamps on the construction site should be lamps with rated voltage of 220V, and screw lamp holders should be selected, instead of lamp holders with switches. The phase line is connected to one end connected to the center contact, and the zero line is connected to one end connected to the threaded port. The insulating shell of the lamp holder shall not be damaged or leaked, and the metal shell of the lighting lamp must be protected and connected to zero. A leakage protection switch must be installed in the single-loop lighting switch box.
(5) The power supply voltage of working lights in wet working environment such as local lighting, indoor plastering and terrazzo floor should not be greater than 36V. The power supply voltage of the lighting lamp working in particularly wet ground, boiler or metal container with good conductivity should not be greater than 12V. Portable lamps for work should be protected by plastic handles and net covers.
(6) The 6)36V lighting transformer must be of double winding type, and the secondary coil, iron core and metal shell must have reliable protection and zero connection. Fuses should be installed on the primary side and the secondary side respectively, and the length of the primary line should not exceed 3m. Lighting transformers must be protected from rain and smashing.
(7) Lighting circuit shall not be tied to metal scaffolding or gantry, and it is forbidden to pull on the ground. When lamps and lanterns need to be installed on metal scaffolding and gantry, the lines and lamps and lanterns must be insulated from them, and the height from the working face is greater than 3 m. The control circuit breaker should be equipped with fuses and rainproof measures.
(8) Lighting fixtures on the construction site shall be controlled by groups or single lamps.