Assembled prefabricated branch cable

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Product Description:

I. Characteristics of the cables
1. Using factory prefabrication methods can substantially reduce the site construction labor intensity and shorten the construction laying time;
2. Use of cables can guarantee great length and bending property, and greatly facilitates the construction in a complex place;
3. Use of cables reduces the laying space, and cables can be installed together with gas and hydraulic gas pipelines;
4. Their reliability and reliability can be fully guaranteed, for the cables are manufactured in the factory,
5. Sub-branch parts should use high strength sealed joints, which are waterproof and have properties of moisture protection, long-term maintenance and free for repair;
6. Because the cables are directly connected with households with no need of maintenance and repair and with easy and simple construction, the cables can produce significant comprehensive economic benefits.
II. Usage of the cables:
1. To be used for high-rise building;
2. To be used for disaster prevention equipments;
3. To be used for tunnel lighting and disaster prevention equipments;
4. To replace copper bus bar with small or medium capacity in various places.
III. Standards of the cables
IEC 60502 Rated Voltage 1 ~ 30KV extruded insulated power cables and accessories (International Electrotechnical Commission standards)
GB 12706 Rated voltage 35KV and below Copper core, Aluminum core plastic insulated power cable (National Standard of the People's Republic of China)
JCS 376 branch cable (Japanese Electric Wire Industry Standard)
General Rules for JIS C2810 indoor wiring electrical connection pipes (Japanese Industrial Standard)

Types of the cables:
Standard main cables and branch cables are all low-voltage power cables with XLPE or PVC insulation materials (IEC, GB, JIS, BS ... ...), and PVC materials covered on the outer side. Generally, the main cable is single-core or twisted multi-core cable (cables with two to five cores), the branch cables are single-core cables, and may adopt a fire-resistant, flame retardant cables in accordance with the requirements.
Their structures and types are as follows:
No.
Cable Description
Type
single core
three cores twisted type
four cores twisted type
five cores twisted type
1
PVC insulated PVC sheathed branch cables
FZ-W
FZ-W-3
FZ-W-4
FZ-W-5
2
PVC insulated PVC sheathed flame-retardant branch cable
FZ-ZRVV
FZ-ZRVV-3
FZ-ZRVV-4
FZ-ZRVV-5
3
PVC insulated PVC sheathed fire-resistant branch cable
FZ-NHVV
FZ-NHVV-3
FZ-NHVV-4
FZ-NHVV-5
4
Cross-linked polyethylene insulated PVC sheathed branch cables
FZ-YJV
FZ-YJV-3
FZ-YJV-4
FZ-YJV-5
5
Cross-linked polyethylene insulated PVC sheathed flame-retardant branch cables
FZ-ZRYJV
FZ-ZRYJV-3
FZ-ZRYJV-4
FZ-ZRYJV-5
6
Cross-linked polyethylene insulated PVC sheathed fire-resistant branch cable
FZ-NHYJV
FZ-NHYJV-3
FZ-NHYJV-4
FZ-NHYJV-5


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Q:What is the heat of the cross-linked cable?
General model: SYV75-X (X on behalf of its insulation diameter 3mm / 5mm, the greater the larger the diameter of the larger) SYV S --- coaxial RF cable, Y --- polyethylene, V --- poly Ethylene
Q:How to connect the power cable pre-branch connector
Pre-branch cable detection: a In addition to routine pressure test, it is necessary to increase the insulation resistance test, with a shake table can be completed in each branch after the completion of injection The table measures the insulation in the finished product After the pressure is also used to detect the insulation of the table to prevent the water cooling process in the branch of the water caused by short-circuit, the general AC voltage test can not detect, can only increase a set of table detection process B Core conduction detection, In each branch body should be tested with the trunk of the conduction test to prevent the production process due to improper operation caused by the branch and the trunk circuit
Q:What is the difference between VV22 and VV62?
Cable flow current is to be hot, look at the table with a look at the current is normal, the current is consistent with the cable configuration. Laying the environment is normal.
Q:What is the difference between a shielded cable and a control cable?
If there is a number of casing is the number of lines marked, if the line before the iron circle is a small nose, line nose in addition to a small circle and fork, and fork almost look.
Q:Ceiling on the wire after the tube is the tube on how to fix it on the ceiling?
That is the two 10KV line is not specifically for you, and perhaps for others.
Q:PVC pipe line 6 points and 4 points which big ah?
35 square copper wire current carrying capacity is 105A, 105A / 35 mm2 = 3A, (1 square millimeter carrying capacity is 3A) 70 square copper wire current carrying capacity is 169A, 169A / 70 square millimeters = 24A (1 square millimeter carrying capacity is 24A) 1 square hai load current from 11A gradually become 24A So it is impossible to use n by the coefficient can be drawn to the current value Wire can carry the current * the applied voltage * power factor = can drive power The diameter of the wire with different diameter is not the same No specific diameter can not know the current carrying capacity How much power, depending on the voltage level Because P = UI As the saying goes: a square 4 current, underground than this small forget How much is the square here is a square millimeter Power depends on your voltage, the general small line can be directly by 5 is to eat the current to 50-120 the basic can take more than 35 can take 25 or so just personal experience to do reference to the need for basic data: 1 line, copper and iron Aluminum silver temperature 3 core number 4 diameter Probably take a square 5A diameter n square of the wire can be over n high current, resulting in n high power so that can be calculated
Q:The TV shows no signal. The What is the reason for this?
We usually say how many square millimeters (wire) refers to the cross-sectional area of the wire core, that is, according to the diameter of the core calculated cross-sectional area. The larger the cross-sectional area of the wire, the greater the capacity of the power transmission.
Q:What is the installation specification for the cable tray bracket?
In accordance with the requirements of the general requirements of the installation of the switch installation height is 1300mm, the socket is 300mm, air conditioning socket is 1800 ~ 2200mm; wall in accordance with the norms is not allowed to take the horizontal pipeline, so the conventional approach is vertical inside the floor of the pipe is near run.
Q:What is the interface between the power interface and the hard disk?
How can you pick up the computer, Internet cafes router connected to the tap, each tap has a lot of jacks, so you can pick up so many computers, you can carefully observe the Internet cafes, some iron box there are a lot of green In the flash is the tap
Q:Brief description of the difference between cable and cable.
Will not interfere with the middle there is no strong electricity! Cable no problem, may be the cable signal as before, you can use a waterproof tape wrapped up ah, do not exposed ah! If the wall with 220V power, then it is easy to string into the TV, the consequences ...

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