General knowledge education on electricity consumption in construction sites 1. Relevant knowledge of electricity consumption in construction site

Everything is based on safety first.

1. Consciously improve the awareness of safe electricity use, adhere to the idea of "safety first, prevention first", ensure the safety of life and property, truly attach importance to safety from the heart and promote safe production.

2. Be familiar with the location (such as toll plaza, construction site, office, dormitory, etc.). ) air switch, the owner of the production site or dormitory. In case of fire, electric shock or other electrical accidents, cut off the power supply at the first time to avoid causing greater property losses and personal injury.

3. Do not connect wires without permission, do not hang clothes and sundries on wires or other electrical equipment, and do not install high-power or electrical equipment that does not meet national safety standards without permission. If necessary, it shall apply to the relevant departments for approval and be installed by electricians.

4. Do not disassemble lamps, switches, sockets and other electrical equipment without permission. Don't bake clothes or use them for other purposes. When there are abnormal phenomena such as smoke, arcing and burning smell inside the equipment, immediately cut off the power supply of the equipment and notify the electrician to carry out maintenance to avoid expanding the fault range and causing electric shock accidents; When the leakage protector (commonly known as leakage switch) trips, it shall not be reclosed without permission.

5. When using electrical equipment (such as hair dryer) in the bathroom or in a place with high humidity, it is necessary to ensure good indoor ventilation and avoid electric shock accidents due to poor electrical insulation.

6. Ensure good heat dissipation of electrical equipment (such as TV sets, electric water heaters, computers, stereos, etc.). ), don't pile up inflammable and explosive articles and sundries around, to prevent bad heat dissipation from damaging equipment or causing fire.

7. Cherish the power resources and form a good habit of using electricity safely and economically. When leaving or not using for a long time, please be sure to cut off the power supply (especially the electric heating appliances) before leaving.

8. Electrical appliances and electrical equipment with mechanical transmission devices must be protected by protective covers, shields or fences. Hands or body cannot enter the mechanical transmission position of the running equipment. When cleaning the equipment, it must be carried out when the power supply is cut off and the machine stops working and safety is ensured to prevent personal injury and death.

9. Don't climb high-voltage towers, fly kites or do other activities near high-voltage lines.

10, without the permission of the relevant departments, shall not enter the electrical room or electrical construction site without authorization.

2. What are the precautions for on-site electricity use?

1. When all electrical appliances are turned on at the same time, it will not pose a threat to the transformer (that is, calculate the maximum power).

2. The electrical wiring is correct and stable, and the grounding wire is set to ensure safety.

3, regularly check the wearing parts.

1) Cable lines should be buried through pipes or laid overhead along walls and poles. Laying along the ground is strictly prohibited.

2) The cable shall be directly buried outdoors, with a depth of not less than 0.6m Fine sand with a thickness of not less than 50mm shall be evenly laid up and down the cable, and then covered with hard protective layers such as bricks.

3) When rubber cables are laid along walls or poles, they should be fixed with insulators, and bare metal wires should not be used for binding. The distance between the fixed points should ensure that the rubber cable can bear the load brought by its own weight. The maximum sag distance of rubber cable should not be less than 2.5m

4) Cable joints shall be firm and reliable, and the joints after insulation bandaging shall not reduce the original insulation strength or bear tension.

5) In the construction site with high-rise buildings, temporary cables must be buried. The vertical laying position of cables should make full use of the shafts and holes of the projects under construction, and be close to the load center, with at least one fixed point on each floor. The cable shall be laid horizontally and fixed along the wall, and the maximum sag distance shall not be less than 18m.

3. The construction site temporary electricity specification

Temporary power consumption on the construction site refers to the power supply and lighting of mechanical equipment provided by temporary power lines, installed electrical appliances and distribution boxes, and the Technical Specification for Temporary Power Consumption on the Construction Site (JGJ46-2005) must be implemented.

This manual consists of 10 chapter, and its main contents include: general principles, terms and specifications, temporary power management, protection of external power lines and electrical equipment, grounding and lightning protection, distribution room and its own power supply, distribution lines, distribution boxes and switch boxes, electrical construction machinery and hand-held power tools, lighting, etc. In the book, the clauses in Technical Specification for Safety of Temporary Electricity Use in Construction Sites (JGJ 46—2005) are briefly analyzed one by one, and the corresponding safety measures (safety technical measures and safety management measures) and the key points of implementation and inspection are defined.

This paper lists the common hidden dangers in the construction site, and puts forward some corresponding preventive measures, which creates conditions for better implementing the code and ensuring the safety of electricity consumption in the construction site. There is an appendix at the back of this book.

This manual can be used as a reference book for electrical engineering technicians, site electricians and full-time project safety personnel in construction enterprises to design, construct, maintain and manage temporary electricity consumption on site, and also as a teaching material for technical training of temporary electricity consumption on the construction site. Extended data:

In order to strengthen the safety construction management of the project, ensure the safety of employees in the production process and promote the development of production, the safety requirements of the construction site of the project department are now formulated, and all units are expected to comply with them: 1. All personnel must wear safety helmets correctly when entering the construction site.

2. It is forbidden to wear hard-soled shoes, slippers, spiked shoes and shirtless (* * * clothes) for aerial work. 3, high homework, dangling homework, must wear a qualified seat belt.

4. Smoking is strictly prohibited on the construction site, and smoking is allowed in the designated area. 5. Don't drink before going to work and don't do homework after drinking.

6. Without the approval of the construction director, no one is allowed to dismantle or move the protective facilities and safety devices at will. 7, are not allowed to throw any material from a height.

8, the scene of all kinds of mechanical equipment, electrical equipment, non-working personnel shall not be arbitrarily used, disorderly pull disorderly wiring. 9, in the production area and living area of the construction site, are not allowed to urinate anywhere, littering and meals, in violation of the safety discipline of the construction site.

10. The notices, forms and rectification notices of potential safety hazards issued by the project quality and safety office must be rectified and fed back in time. 1 1, special operations personnel must hold relevant certificates or their certificates are consistent with those of people.

12, it is forbidden to play and frolic in the operation area. 13, it is forbidden to violate the safety operation procedures, and the project department has the right to punish those who don't listen to the advice of the safety officer.

14. The wires and cables on the construction site should be overhead, and it is forbidden to crush the cables and wires with a hopper. 15, it is forbidden to directly plug the power cord into the power socket without a power plug.

16, it is forbidden not to take the safe passage, climb and jump, and climb over the scaffold. 17, it is forbidden to arbitrarily use fire control facilities for other purposes.

18, it is forbidden to cook or use high-power appliances in the dormitory. 19, the operation procedures should be strictly implemented in the construction, and illegal command, illegal operation and risky operation are strictly prohibited.

20. Newcomers must report in time and have safety education. It is forbidden to work without safety education. 2 1, it is forbidden to pile up all kinds of materials on scaffolding, scaffolding must be spread all over and tied to the head.

22, it is forbidden to unloading platform overweight and not timely transfer of materials. 23, it is forbidden to template support scaffolding, overweight, ultra-high stacking materials or less than time to spread out.

24. The construction site must be cleaned up after work. 25, it is forbidden to material heap, the place, not neat, no sign.

26. After the construction is completed, the power supply of machinery and lighting lamps must be turned off. 27, there is a clear ban on fireworks signs or other flammable and explosive places for welding operations must apply for a hot card.

28, machinery must be fixed personnel operation, non-mechanical operators shall not start the machinery without authorization, without permission, shall not be engaged in this type of work, the operator shall not leave without authorization. 29. During the construction period, it is forbidden to be tired or work in spite of illness.

30, each type of work is strictly prohibited in the floor, limb, scaffolding and other dangerous places that endanger personal safety to rest or play. 3 1, non-operating personnel, family members and children are strictly prohibited from entering the construction site.

32. Non-electricians are forbidden to engage in electrical work. 33, tower crane operation must have witness operation and witness command.

34. It is forbidden to overload the construction elevator, and all kinds of safety facilities must be complete and effective. 35. It is forbidden to knock and throw steel pipes, steel molds or other objects that are prone to high noise at the construction site.

36, the construction site must be wet, covering operation, control dust. 37, the construction site electrician, machine operator, tower crane driver, tower crane command and other special types of work are strictly prohibited to leave their posts.

38, tower crane commanders, it is forbidden to command or do other things that have nothing to do with the command. 39, welding machine used in the construction site must have a reliable safety leakage protection device (secondary protection device).

40. It is forbidden to block and throw steel pipes and fasteners around when the formwork is dismantled. 4 1, it is forbidden to pry open the template without following the operation procedures; It is forbidden to stand on the steel pipe rack to install and dismantle the formwork.

42. It is forbidden to hoist materials on the construction site without binding them firmly according to safety regulations. 43, elevator shaft, reserved hole, safety protection around the building must be closed in time.

44, oxygen, acetylene bottle operation must ensure enough safety distance (10 meters). 45, it is forbidden to scaffolding, not according to the plan frame plate must be spread, every two steps with a horizontal safety net closed.

46, the subcontract construction units, prohibit the use of child labor, underage workers and elderly workers. 47. Disabled people with physical defects are not allowed to be used on the construction site.

48, the construction site roads must be kept clear, without sundry, stones and other dangerous goods. All construction units must strictly abide by the above provisions, and relevant personnel will be held accountable if there is any violation.

Baidu Encyclopedia-Implementation Manual of Technical Specification for Temporary Electricity Safety in Construction Site.

4. What are the requirements for temporary electricity utilization on the construction site?

Construction plan 1. Temporary power consumption is independently designed by the project engineer, and temporary power consumption projects are regularly tested. Electricians must be operated by certified personnel.

2. The power distribution on the construction site shall be arranged in accordance with the Technical Specification for Safety of Temporary Electricity Use on the Construction Site. The power supply system adopts TN-S protective conductor and neutral conductor grounding system separately, and the three-phase five-wire power supply system must meet the requirements of three-level distribution and two-level protection. 3. Each electrical equipment must meet the requirements of "one machine, one brake and one leakage box", the line signs should be clear, the leads should be neat, and each electrical box should have doors and locks to meet the requirements of rain and moisture. The electrical equipment used shall conform to the current national standards and shall have a certificate of conformity. The equipment should have a nameplate, and the electrical equipment in use should be kept in good working condition.

4. The power distribution room must meet the requirements of "Four Preventions and One Ventilation" to ensure fire prevention, moistureproof, waterproof, animal prevention and good ventilation. The room should be equipped with insulation equipment, supporting electrical fire fighting equipment, emergency lighting and other safety appliances. 5, the establishment of temporary electricity construction organization design and safety technical measures for examination and approval system, and establish the corresponding technical files.

6. Establish a technical degree of * * * and introduce the general intention, technical content and matters needing attention of temporary electricity construction organization design and safe electricity technical measures to professional electricians and all kinds of electricity users, and perform the signing procedures of the disclosure person and the disclosure person on the written materials of technical disclosure, indicating the disclosure date. 7. Establish a safety inspection system.

Starting from the temporary power utilization project, the temporary power utilization project shall be tested regularly, including the grounding resistance value, insulation resistance value of electrical equipment, operation parameters of leakage protector, etc. 8. Establish electrical maintenance system, strengthen daily and regular maintenance work, discover and eliminate hidden dangers in time, and establish maintenance records, recording maintenance time, place, equipment, content, technical measures, treatment results, maintenance personnel and acceptance personnel.

9, the establishment of engineering demolition system. After the completion of the project, the demolition of the temporary electricity utilization project should have unified organization and command, and the demolition time, personnel, procedures, methods, precautions and protective measures should be specified.

10, establish patrol inspection and assessment system. Construction management departments and enterprises should regularly inspect and evaluate the site electricity safety according to JGJ59-99 "Safety Inspection Standard for Building Construction".

1 1. Establish a responsibility system for safe electricity use, and implement the operation, monitoring and maintenance of all parts of the temporary electricity use project to people, supplemented by necessary rewards and punishments. 12, establish a safety education and training system, and regularly conduct electricity safety education and training for professional electricians and various electricity users.

Anyone who takes up the post must hold a post certificate issued by the relevant department, and it is strictly forbidden to take up the post without a license. [1] The electrical equipment is set 1, and the power distribution system is set with indoor main distribution box and outdoor distribution box or outdoor main distribution box and distribution box, and the distribution is carried out at different levels.

2. Power distribution box and lighting distribution box should be set separately. If placed in the same distribution box, the power and lighting lines should be set separately, and the lighting line should be connected to the upper side of the power switch. 3. The switch box should have a final distribution box, and there should be one brake and one leakage in the switch box. Each electrical equipment should be equipped with its own switch box. It is forbidden to directly control two or more electrical equipment with one switching appliance.

4. The main distribution box should be located near the power supply, and the distribution box should be installed in the area where the electrical equipment or load is relatively concentrated. The distance between the distribution box and the switch box should not exceed 30m, and the horizontal distance between the switch box and the fixed electrical equipment it controls should not exceed 3m. 5, distribution box, switch box should be installed in a dry, ventilated, normal temperature place, shall not be installed in harmful media such as gas, flue gas, steam, liquid with serious loss.

Nor should it be installed in a place that is vulnerable to the impact of foreign solid objects, strong vibration, liquid splashing and heat source baking. Around the distribution box and switch box, there should be enough space for two people to work at the same time, and articles that hinder operation and maintenance should not be piled around.

6, distribution box, switch box installation should be correct and firm, mobile box is located in a solid bracket. The vertical distance between the lower surface of fixed distribution box and switch box and the ground should not be greater than 1.3m, nor should it be greater than1.5m. ..

Mobile distribution box and switch box are made of iron plate or high-quality insulating material. The thickness of iron plate should be greater than1.5m.

7. The inlet and outlet of distribution box and switch box should be located at the bottom of the box, and it is forbidden to be located at the top, side, back or door of the box. [2] Electrical equipment installation 1. The electrical appliances in the distribution box should be installed on the metal or non-wood insulated electrical appliance installation board first, and then fastened in the distribution box as a whole. The metal plate should be electrically connected with the distribution box, and the metal plate should be electrically connected with the distribution box.

2. The electrical appliances in the distribution box shall be fixed in the specified position with the mounting plate, and shall not be skewed or loose. In addition, the distance between electrical equipment and the surrounding environment should meet the requirements of relevant process standards.

3. The working zero line in the distribution box and switch box should be connected by terminal board, and the protective zero line terminal should be set separately. 4, distribution box, switch box connection adopts insulated wire, wire type and cross section should strictly implement the temporary electricity drawing section.

The connecting wires between various instruments shall be insulated copper wires with a cross section of not less than 2.5 mm. The wire joints shall not be loose and there shall be no exposed live parts.

5. The cables at the back of the distribution box should be arranged neatly. Bundle them into bundles, and the incoming and outgoing lines behind the tray should be properly redundant for easy maintenance.

6, wire exploitation to prevent wire core damage is too long, wire pressure head should be solid and reliable, multi-strand wire should not be coiled, pressure welding, multi-strand wire should be rinsed tin before pressure welding, and shall not reduce the number of wire shares. 7. Operators and maintenance personnel of electrical equipment must meet the following requirements: a. The construction and maintenance of temporary electricity consumption on the construction site must be completed by professional electricians who have obtained post certificates after training, and junior electricians are not allowed to carry out intermediate or advanced operations.

B, all kinds of electricity users should do: a, master the basic knowledge of safe electricity use and the performance of the equipment used. B, before using the equipment, you must wear and equip the corresponding labor protection articles according to the regulations; And check whether the electrical devices and protection facilities are in good condition.

It is forbidden to operate the equipment "with illness". C, stop using the equipment must switch power, lock the switch box; D, responsible for protecting the load line of the equipment used, protecting the zero line and the switch box, and solving problems in time when found.

Carry or move.

5. Contents of Technical Specification for Safety of Temporary Electricity Use in Construction Site

Measures for safe use of electricity include the following.

(1) Technical measures for safe electricity use 1. TN-S power supply system is selected for this project. It is a power supply system that strictly separates the working zero line N from the special protection line PE at the power supply, also known as three-phase five-wire system.

Its advantage is that there is no current on the special protection line, which is specially used to bear the fault current and ensure the action of its protection device. In particular, the PE line is not allowed to be broken.

At the end of power supply, PE line should be grounded repeatedly. 2, set the leakage protector (1) The total distribution box and switch box at the construction site should be set with at least two levels of leakage protectors, and the two levels of leakage action current and rated leakage action time should be reasonably coordinated to make it have the function of hierarchical protection.

(2) A leakage protector must be set in the switch box, and all electrical equipment on the construction site must be installed at the head end of the equipment load line in addition to the protection connection. (3) The leakage protector shall be installed on the load side of the power isolating switch of the distribution box and the load side of the power isolating switch of the switch box.

(4) The selection of leakage protector shall meet the requirements of GB6829-86 "Leakage Action Protector (Residual Current Action Protector)". The rated leakage action current and rated leakage action time of the leakage protector in the switch box should be no more than 30mA and less than 0.1s.. Leakage protectors used in damp and corrosive media places should adopt splash-proof products. The rated leakage action current shall not be greater than 15mA, and the rated leakage action time shall be less than 0. 1.3. The setting of electrical equipment shall meet the following requirements (1). The power distribution system shall be equipped with outdoor main distribution box and distribution box, and the distribution shall be carried out at different levels.

(2) Power distribution box and lighting distribution box should be set separately. If placed in the same distribution box, the power and lighting lines should be set separately, and the lighting line should be connected to the upper side of the power switch. (3) The switch box shall be distributed by the final distribution box.

The switch box should be "one machine, one brake and one box", and each electrical equipment should have its own switch box. It is forbidden to use a switch to directly control two or more electrical equipment. (4) The main distribution box should be located near the power supply, and the distribution box should be installed in the area where the electrical equipment or load is relatively concentrated.

The distance between the distribution box and the switch box shall not exceed 30m, and the horizontal distance between the switch box and the fixed electrical equipment it controls shall not exceed 3m. (5) The distribution box and switch box shall be installed in a dry, ventilated and normal temperature place.

Do not install in smoke, steam, liquid and other harmful media with serious damage. Nor should it be installed in places that are vulnerable to external solid impact, strong vibration, liquid splashing and heat source baking.

Around the distribution box and switch box, there should be enough space for two people to work at the same time, and articles that hinder operation and maintenance should not be piled around. (6) The distribution box and switch box shall be installed correctly and firmly, and the mobile box shall be installed on a solid bracket.

The vertical distance between the lower surface of fixed distribution box and switch box and the ground shall be greater than 1.3m and less than1.5m. The vertical distance between the lower surface of mobile distribution box and switch box and the ground shall be 0.6-1.5m. ..

The distribution box and switch box should be made of iron plate or high-quality insulating material, and the thickness of iron plate should be greater than 1.5mm(7). The inlet and outlet of distribution box and switch box should be located at the bottom of the box, and it is forbidden to be located at the top, side, back or door of the box.

4. Electrical equipment installation (1) The electrical appliances in the distribution box should be installed on the metal or non-wood insulated electrical appliance installation board first, and then fastened in the distribution box as a whole. The metal plate should be electrically connected with the distribution box. (2) All kinds of electrical appliances in the distribution box and switch box shall be fastened on the mounting plate according to the specified position, and shall not be tilted or loosened.

In addition, the distances between electrical devices and between devices and circuit boards should meet the requirements of relevant process standards. (3) The working zero line in the distribution box and switch box shall be connected through the terminal board and separated from the terminal board protecting the zero line.

(4) The connecting wires in the distribution box and switch box shall be insulated wires, and the type and section of the wires shall strictly follow the section marked in the temporary electrical drawings. The connecting wire shall be an insulated copper wire with a cross section of not less than 2.5 square millimeters.

The wire joint shall not be loose, and there shall be no leakage of live parts. (5) The metal frame, metal box, metal electrical installation plate, and the metal base and shell in which the electrical appliances in the box are normally not charged must be protected by zero, and the protective zero line should be connected through the terminal board.

(6) The cables behind the distribution box should be arranged neatly, bundled and fixed on the panel with clips. The lead-out wires and lead-in wires behind the panel should have proper redundancy to facilitate maintenance. (7) Wire exploitation should not damage the wire core too long, and the wire pressure head should be solid and reliable. Multi-strand conductors should not be crimped into coils, and crimping terminals should be installed (except those with crimping holes).

If it is necessary to press the top wire for drilling, the multi-strand wire should be washed with tin before pressing, and the number of conductor strands should not be reduced. 5. Protection of electrical equipment (1) The project under construction shall not be constructed under high and low voltage lines, and sheds, living facilities or sundries such as components, shelves and materials shall not be erected under high and low voltage lines.

(2) During construction, a safe operating distance must be kept between the outer edge of various shelves and the sideline of electric overhead lines. When the external circuit voltage is below 1KV, the minimum safe operating distance is 4m; When the external overhead line voltage is 1- 10KV, its minimum safe operating distance is 6m; When the external overhead line voltage is 35- 1 10KV, its minimum safe operating distance is 8m.

The minimum horizontal distance between any part of the crane or the edge of the hoisted object and the sideline of overhead lines below 10KV shall not be less than 2m. (3) When the motor vehicle lane crosses the power overhead line on the construction site, the minimum vertical distance between the lowest point of the overhead line and the road surface shall meet the following requirements: when the power line voltage is below 1KV, the minimum vertical distance shall be 6m; When the external line voltage is 1-35KV, the minimum vertical distance is 7m.

(4) When the minimum safe distance cannot be reached, protective measures must be taken at the construction site, such as adding fences, blocks, fences or protective nets, and hanging eye-catching warning signs. When erecting protective facilities, electrical engineers or full-time security personnel shall be responsible for monitoring.

(5) For the construction site that can't reach the minimum safe distance and can't erect protective measures, the construction unit must negotiate with relevant departments and take measures such as power failure, relocation of external wires or change of project location, otherwise the construction may not be carried out. 6, electrical equipment operation and maintenance personnel must meet the following requirements.

6. What should we pay attention to in wire construction knowledge and construction safety?

Before construction personnel enter the construction site, they must carry out education and assessment on construction safety and fire control knowledge, and employees who fail the assessment are prohibited from entering the construction site to participate in the construction.

When entering the construction site, you must wear a safety helmet, fasten your hat belt and use personal labor protection articles correctly. Strictly implement the operating rules, and shall not command or operate illegally, have the right to refuse the instruction of illegal operation and have the responsibility to stop others from operating illegally.

Personal protective equipment must be worn correctly during construction work, and safety helmet must be worn when entering the construction site. Don't use fire without permission, and don't operate after drinking.

Slippers, high heels, barefoot or shirtless are not allowed to enter the construction site. Hard-soled shoes should not be used for climbing.

When working at high altitude, steel bars and structures, you must wear non-slip shoes. On-site electricity consumption must be managed by special personnel, and a special distribution box must be set up at the same time. It is forbidden to connect and pull randomly, and implement the system of listing electricity, especially to put an end to illegal operation and prevent personal, line and equipment accidents.

Electric drills, hammers, welding machines and other electrical appliances must have leakage protection devices and good grounding protection ground wires. All electrical appliances and cables must be inspected regularly to ensure good insulation. When using electrical appliances, you should wear insulating shoes and gloves. Safe voltage below 36V must be used for construction site lighting. When not in use, all electrical appliances must be cut off at any time to prevent the equipment from burning out.

Where blowtorches, electric welding machines and necessary open flames are used, it is necessary to fill in the application for registration of using fire and designate special personnel to take care of it, and carry fire-fighting equipment with you to ensure the implementation of fire-fighting measures. When welding, special attention should be paid to check whether there are flammable materials below and make corresponding protection. After use, check that there is no fire before leaving.

Do not go to work without passing the safety education and training, and non-operating personnel are strictly prohibited from entering the dangerous area; Special operations personnel must hold a special operation qualification certificate. Fasten your seat belt when working at heights of more than 2 meters without safety facilities; You must fasten your seat belt before operation.

Materials and tools for working at heights shall not be thrown up and down. Personnel engaged in aerial work should experience it regularly.

Anyone who suffers from hypertension, heart disease, anemia, epilepsy and is not suitable for aerial work shall not engage in aerial work. The use of mechanical equipment, machines and tools must implement the system of "one person, one machine"; Without the consent of the relevant personnel, non-operating personnel shall not use it.

Electric mechanical equipment must have leakage protection device and reliable protection to zero before it can be used. Without the approval of the relevant personnel, the safety facilities and safety devices shall not be dismantled at will; If it needs to be dismantled due to operation, it must be restored immediately after the operation is completed.

Tick-tac-toe baskets and hoppers are not allowed to carry people. Do not do your homework after drinking.

Before operation, safety technical disclosure shall be made to relevant operators.

7. Several principles should be followed when using electricity on the construction site.

Go to Baidu Library to check the complete content > Content comes from users: several principles to be followed in the construction of electronic publishing network. Electric power is an indispensable energy source in the construction, and it is difficult to ensure the smooth progress of the construction process without the required electrical equipment in the construction site.

However, with the continuous progress of power technology, the operation of construction electricity has become more stringent. After the continuous use of various multifunctional equipment in building construction, the automation of construction puts forward higher requirements for electricity consumption.

It is a problem that every engineering unit needs to actively think about to formulate a scientific electricity utilization scheme on the construction site, and the relevant principles that should be followed in the electricity utilization on the construction site are emphatically analyzed. Keywords architecture; On-site electricity consumption; Principle; It is undeniable that "electricity" has played an extremely important role in the development of human society, but electric energy has brought many problems while creating benefits for human beings. If used improperly, it will also cause various accidents.

However, in the construction site, due to the characteristics of a large number of electrical equipment, difficult operation and wide use of electricity, many electrical equipment have various problems due to improper use of electricity. The construction of 1 pays attention to the necessity of electricity consumption. In the process of construction, electricity must be used according to the power standard, otherwise it will bring a lot of trouble to the project.

At the construction site, the engineering units and technicians should design the electricity utilization scheme in combination with the actual terrain to ensure the smooth development of the construction operation. To prevent accidents in the process of electricity use, these are all problems that need to be paid attention to in the construction process.

1) saves costs. With the development of the construction industry, electrical equipment has become an indispensable part of the project and plays an irreplaceable role in the whole construction project.

Paying enough attention to electricity consumption in construction can prevent the increase of maintenance times and effectively save engineering costs.

8. What are the requirements for temporary electricity consumption at the construction site?

Requirements:

1, the power distribution system should be equipped with indoor main distribution box and outdoor distribution box or outdoor main distribution box and distribution box, and the distribution should be carried out at different levels.

2. Power distribution box and lighting distribution box should be set separately. If placed in the same distribution box, the power and lighting lines should be set separately, and the lighting line should be connected to the upper side of the power switch.

3. The switch box should have a final distribution box, and there should be one brake and one leakage in the switch box. Each electrical equipment should be equipped with its own switch box. It is forbidden to directly control two or more electrical equipment with one switching appliance.

4. The main distribution box should be located near the power supply, and the distribution box should be installed in the area where the electrical equipment or load is relatively concentrated. The distance between the distribution box and the switch box should not exceed 30m, and the horizontal distance between the switch box and the fixed electrical equipment it controls should not exceed 3m.

5, distribution box, switch box should be installed in a dry, ventilated, normal temperature place, shall not be installed in harmful media such as gas, flue gas, steam, liquid with serious loss. Nor should it be installed in a place that is vulnerable to the impact of foreign solid objects, strong vibration, liquid splashing and heat source baking. Around the distribution box and switch box, there should be enough space for two people to work at the same time, and articles that hinder operation and maintenance should not be piled around.

6, distribution box, switch box installation should be correct and firm, mobile box is located in a solid bracket. The vertical distance between the lower surface of fixed distribution box and switch box and the ground should not be greater than 1.3m, nor should it be greater than1.5m. Mobile distribution box and switch box should be made of iron plate or high-quality insulating material. The thickness of iron plate should be greater than1.5m.

7. The inlet and outlet of distribution box and switch box should be located at the bottom of the box, and it is forbidden to be located at the top, side, back or door of the box.

Extended data

Installation of temporary electrical equipment for construction:

1, the electrical appliances in the distribution box should be installed on the metal or non-wood insulated electrical appliance installation board first, and then fastened in the distribution box as a whole, and the metal plate should be electrically connected with the distribution box.

2. The electrical appliances in the distribution box shall be fixed in the specified position with the mounting plate, and shall not be skewed or loose.

3. The working zero line in the distribution box and switch box should be connected by terminal board, and the protective zero line terminal should be set separately.

4, distribution box, switch box connection adopts insulated wire, wire type and cross section should strictly implement the temporary electricity drawing section.

5. The cables at the back of the distribution box should be arranged neatly. Bundle them into bundles, and the incoming and outgoing lines behind the tray should be properly redundant for easy maintenance.

6, wire exploitation to prevent wire core damage is too long, wire pressure head should be solid and reliable, multi-strand wire should not be coiled, pressure welding, multi-strand wire should be rinsed tin before pressure welding, and shall not reduce the number of wire shares.

7, electrical equipment operation and maintenance personnel must meet the requirements.