In summer, there are thunderstorms and the overall safety of the construction site has a greater impact; therefore, before the rainy season, in order to ensure the safety of electricity on the construction site, Quark Motor has collected the following preventive work through sorting out:

1. All kinds of electrical equipment used in the open air should be placed in a higher dry place.

2. Install reliable rainproof facilities for the main distribution box, distribution box and switch box, and the welding machine should be equipped with a protective rain cover.

3. Before the rainy season, check the lighting and power lines for mixed wiring, leakage, and whether the poles are corroded or buried loose to prevent electric shock.

4. Before the rainy season, check whether the zero connection and grounding protection measures of the on-site electrical equipment are reliable. All electrical equipment on the construction site, in addition to protecting the zero connection, must also install a leakage protector at the beginning of the equipment load to check the leakage protection Whether the device is sensitive and whether the wire insulation joint is good. For electrical equipment switch boxes, water pump control boxes, and leakage protectors used in humid places, the rated leakage current (the parameter of leakage protection, that is, the leakage protector starts to operate when the leakage current is reached) is not more than 15mA, and the action time Less than 0.1s.

5. Pay close attention to weather forecasts. Before dangerous situations such as heavy rains, temporary electricity at the construction site should be cut off except for lighting, drainage and emergency rescue.

6. It is necessary to promptly investigate and eliminate hidden dangers of various accidents at the construction site, and reasonably arrange the project progress and procedures according to the changes in the rainy season weather to ensure the safety of front-line operators.

)

Since electricity used at construction sites is generally temporary electricity use, according to JGJ46-2005 "Technical Specification for Temporary Electricity Use at Construction Sites", large and medium-sized production and construction projects should prepare temporary electricity use specifications at construction sites and carry out construction organization design accordingly. . The construction site should use the TS-S power supply system to supply power, and should be in accordance with the characteristics of electric shock and injury accidents in the rainy season, the temporary power lines, distribution boxes, equipment, etc. on the site may suffer rain, water flooding, and line insulation may be easily damaged In accordance with the relevant provisions of the temporary electricity safety technical specifications, formulate specific safety technical guarantee measures.

At the same time, the person in charge of the project should organize a thorough inspection of each distribution box, electrical equipment, external wires, and cable entry on site, and take corresponding rain and moisture protection measures, including electrical equipment installation and construction site cables Circuit maintenance, formulation of lightning protection measures and improvement of various management systems, etc.

  1. Installation of electrical equipment in rainy season

The distribution box must be rain-proof and waterproof. The electrical layout must comply with the regulations. The electrical components must not be damaged. Live exposure is strictly prohibited. The connection line of the distribution box and switch box should be insulated cables. The switch box implements "one machine, one box, one gate, one "Leakage" system (one machine, namely: an independent electrical equipment, such as tower crane, concrete mixer, steel bar cutting machine, etc.; one box, namely: independent distribution box; one gate, that is: an obvious disconnection point Electrical equipment, such as circuit breakers; one leakage, namely: leakage protector), the metal shell of electromechanical equipment must be reliably grounded or connected to zero.

  2. Cable line at the construction site

  External wires and cables must not be damaged. The power cords must not use bare wires and plastic wires, and they must not be laid along the ground to prevent fire accidents caused by short circuits.

  Before the rainy season, check whether the leakage protection device of hand-held power tools is sensitive. The voltage of temporary lighting and sign lamps on the construction site shall not exceed 36V; the lighting in particularly humid places and metal pipes and containers shall not exceed 12V to ensure the safety of electricity.

  3. Take lightning protection measures

  Before the rainy season, during construction work on the construction site, lightning protection measures should also be taken for the circuit.

  Tower cranes, external elevators, steel pipe scaffolding, well-frames, gantry and other tall facilities, as well as kiln tail towers and other projects under construction, all should install reliable lightning rods and other lightning protection facilities.

  Tower crane track should generally be equipped with two sets of grounding devices. For longer tracks, a set of grounding devices should be supplemented every 20m.

On metal structures such as tic-tac-toe and gantry hangers with a height of 20m and above, the middle pole on one side of the structure can be connected to the height, 2m above the top as an air-termination device (a kind of lightning protection device, located The top of the device, its function is to use its protruding position above the protected object to lead the lightning to itself, to accept the direct lightning discharge), set a grounding wire at the bottom of the pole, and connect it to the grounding pole, and at the same time the hoist The metal shell of the device is grounded.

  The material and height of the scaffolding make it the focus of lightning protection for construction sites in the rainy season. It is recommended to use scaffolding along the four sides of the building to increase the height by 2~3m as air-termination devices. The lower end is connected to the grounding electrode, and the distance between the air-termination devices should not exceed 24m. If the building under construction has prominent high points, similar lightning protection design should be done. As the scaffolding rises, the air-termination system should also be raised in time.

  4. Improve the management system

According to the characteristics of the site, the project must establish a sound management responsibility system for temporary electricity use, establish that the temporary electricity use at the project site is the responsibility of the general contractor, and enter all power distribution equipment and electrical equipment (distribution boxes, switches) on the project site. Boxes, hand-held power tools, electric welders, etc.) must be inspected by the general contractor before they can be used.

  Establish a daily safety electricity grading inspection mechanism, that is, the inspection of general contractors and subcontractors, self-inspection of on-site electricians and supervision and inspection of management personnel.

Construction companies should also strengthen the popularization of knowledge on temporary electricity usage at the project site. Before the rainy season and the flood season, the project manager should deploy the rainy season construction electricity safety education. The responsible engineer in each region can organize the construction management personnel and operating workers in the region. Targeted safety education and clarification on electricity construction during the rainy season, and the training time shall not be less than 2 hours.

In addition, it is recommended to set up 1 accidental injury emergency personnel in the project department and construction team. First aid personnel must be trained in electric shock first aid, and according to the engineering site emergency plan, conduct regular drills on first aid after electric shock accidents and be familiar with electric shock After on-site first aid procedures, reduce the occurrence of electric shock accidents.

Quark Motor specializes in producing diesel generator sets，Volvo diesel generator set，Yuchai diesel generator set，Cummins diesel generator set，Shangchai diesel generator set，400kw Cummins diesel generator setWait for a full range of diesel generator sets, consultDiesel generator set manufacturers,to understandingdiesel generator set offer, welcome to inquire; we are a manufacturer of diesel generator sets, and we will solve your power problems in all aspects!24-hour hotline：400-966-0200,website：en.kuake.biz