Is it necessary to use a closed wire box certified by civil air defense engineering for electrical e

Yes, civil air defense engineering.

Electrical pre-embedding must use an airtight wire box with air defense certification.

The civil air defense closed junction box is the civil air defense basement.

An important protective accessory for electrical systems. According to the requirements in the civil air defense atlas 07FD02, the finished product of the civil air defense airtight junction box is at least 3mm steel plate production.

It is said that it is a closed junction box, so it must reach a closed state, so the box itself must be fully welded, and there can be no air leakage and no light leakage. As for its anti-corrosion performance, it depends on hot-dip galvanizing.

The protective layer must be hot-dip galvanized. The galvanized layer must reach a certain thickness in order to play the function of anti-corrosion and anti-rust.

It is best to be qualified, otherwise the civil air defense supervision will look for thorns, if the relationship is good, cold galvanized can also be, mainly depends on the relationship, but with less words, try to do everything according to the formal, such as the civil air defense installation certificate certificate or something is in place.

There is no requirement for this, but there is a thickness requirement for the cover.

Civil air defense engineering electrical steel pipe embedded specifications, according to the "civil air defense engineering construction and acceptance specifications" of the first lamp head box, switch box, junction box, etc., should be fixed close to the template, and should be connected with the cable, wire, dark piping should be firmly connected with the structural steel bar spot welding.

Due to the limitation of the construction period or due to other requirements, the reverse method of construction of the project, that is, the earthwork of the roof of the project is excavated first, the column body is drilled and poured, the roof is poured, the ground traffic is restored, and then the ground is excavated under the cover of the roof, and the bottom plate and wall are poured to complete the engineering structure.

In terms of construction methods, the civil air defense project constructed according to the reverse method is between the excavation type and the pit tunnel project, but it is completely different from the pit tunnel project in terms of the type of stress structure, and the excavation type is only a slightly different excavation type project.

By construction form:

Civil air defense projects can be divided into tunnel engineering, tunnel engineering, stacking engineering and excavation engineering according to the form of construction.

Tunnel engineering: Tunnel engineering is mostly a hidden excavation project where the main ground is lower than the minimum entrance, and most of them are built on flat ground.

Tunnel engineering: Tunnel engineering is mostly a hidden excavation project where the main ground is higher than the lowest entrance, and is mostly built in mountainous or hilly areas.

Stacked works: Stacked works are works in which most of the structure is above the original surface and covered by backfill.

Excavating engineering: Excavating engineering is a project constructed by the open cut method and most of the structure is below the original surface, including single construction and attached construction. There are generally no directly connected buildings in the upper part of a single-building project; The upper part of the annex has a sturdy building, also known as an air-raid basement.

Don't worry, I'll send you an attachment that says, 07fd02

The civil air defense airtight box is an important protective accessory in the basement electrical system, so how to do the hydroelectric airtight box? Let's briefly teach you. How to do the hydroelectric air defense airtight box 1, first make an installation hole on the furniture countertop, fix the junction box with screws, and carefully defeat the Mingchang nuclear elevation.

2. Connect the cable in the junction box, if it is a pop-up box, the cable should be left longer to make the junction box bounce up smoothly. 3. It should be noted that the junction box should be grounded with the pipeline, and if it is a buried junction box, it should be grounded with the welded steel pipe. 4. Finally, arrange the cables, and reserve the equipment holes, and the reserved electrical shafts, holes, and holes should be of appropriate size.

What are the installation standards of civil air defense airtight box 1, if the distance from the top of the junction box to the ground is 50 cm, it can not be towed. The force offset of the ground anchor needs to be checked to ensure that the airtight is installed correctly. During installation, it is necessary to ensure that the working of the junction box and the hanging point will not be bent.

2. When the closed Huai Roll Box is connected to the pole, when the pole is slowly erected, it must be carried out under the arrangement of the commander, and the junction box needs to be sent out slowly, so that the bottom of the pole is slowly close to the chassis. If you want to pull the cable on both sides, you need to relax or tighten the junction box properly. 3. If the civil air defense airtight box fails, then the speed of traction needs to be slowed down appropriately, and the rope behind it is firmly grasped.

In addition, the brake rope should be adjusted as much as possible so that the root of the pole is close to the chassis, so that the pole is in a stable state. 4. If the closed box checks the pole failure, the traction should be stopped, and the rope of the pole should be loosened. If the pole is not working properly, you need to take one out first and slowly tow it elsewhere.

Hello dear, the wire pipe connecting the civil air defense clean area or the poisoned area should be provided with a closed junction box, which is used to avoid the poisoned air in the poisoned area from invading the clean area through the wire pipe and endangering the safety of internal personnel. Its appearance can prevent indirect contact or electric shock, and ensure the safety of personal imitation. In the process of engineering construction, if the electrical equipment line is damaged or a grounding fault occurs, its exposed conductive part will have an adverse impact on the zone fault voltage.

And the civil air defense airtight box can prevent such an unexpected preparation book. It can automatically cut off the ground fault circuit, and it can also be electrically isolated to avoid unexpected situations. Hope it helps.

Summary. 1. Installation Steps:

1. First cut an installation hole on the furniture countertop by the furniture company (please note that the opening size of different products is different), the junction box is embedded with iron nails nailed to the template to fix, and then the pipe, the nozzle is effectively blocked and the junction box is loaded with sawdust and ash mixture to prevent the mortar from entering the junction box, and finally cover the back cover of the junction box and mark it on the template.

2. Fix the junction box with screws or self-made "well" shaped steel frames, and carefully check the elevation.

3. Connect the cable, pay attention to the length of the cable of the pop-up junction box, so that the junction box can bounce up smoothly.

4. The junction box must be reliably grounded with the pipeline, and the buried junction box and the welded steel pipe are welded with round steel and the double-layer folding edge of the junction box, and the galvanized steel pipe or surface-mounted junction box is grounded with a special grounding wire card.

5. The cables should be reasonably arranged, and the reservation of equipment holes should be carefully reviewed according to the drawings to see if the position and size of the electrical shafts, holes, holes, etc. reserved for civil engineering are correct.

Where should the underground civil air defense project be encrypted and closed? How to load.

Hello. Hello, why don't you have my question above.

1. Installation steps: 1. First cut an installation hole on the furniture countertop by the furniture company (please note that the opening size of different products is different), the junction box is embedded with iron nails nailed to the template and fixed, and then the pipe, the junction box is effectively blocked and the junction box is filled with sawdust and ash mixture to prevent the mortar from entering the junction box, and finally the back cover of the junction box is covered, and the template is marked. 2. Fix the junction box with screws or self-made "well" shaped steel frames, and carefully check the elevation.

3. Connect the cable, pay attention to the length of the cable of the pop-up junction box, so that the junction box can bounce up smoothly. 4. The junction box must be reliably grounded with the pipeline, and the buried junction box and the welded steel pipe are welded with round steel and the double-layer folding edge of the junction box, and the galvanized steel pipe or surface-mounted junction box is grounded with a special grounding wire card. 5. The cables should be reasonably arranged, and the reservation of equipment holes should be carefully reviewed according to the drawings to see if the position and size of the electrical shafts, holes, holes, etc. reserved for civil engineering are correct.

Precautions for civil air defense closed junction box: 1. Be sure to confirm the size of the opening; 2. If you open the hole by yourself, you must not open the hole wide, you need professional tools to cooperate; 3. Do not tear off the protective film on the surface of the junction box when installing the junction box; 4. The edge of the panel of the civil air defense airtight junction box is thin, pay attention to scratches and bumps; 5. The length of the cable should be about 25cm in the range of about 25cm that can take the junction box out of the table. 2. Install the façade socket (suitable for 86 boxes on the wall):

1. Connect the cable with the façade socket first; 2. Put the wall wiring panel connected to the cable into the wall 86 box, and pay attention to leave a suitable length for future maintenance; 3. Use screws to screw the wall wiring panel and the 86 box. The above is the introduction to the installation of the civil air defense closed junction box, which can protect our electricity safety in daily use.