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:
three cores twisted type
four cores twisted type
five cores twisted type
PVC insulated PVC sheathed branch cables
PVC insulated PVC sheathed flame-retardant branch cable
PVC insulated PVC sheathed fire-resistant branch cable
Cross-linked polyethylene insulated PVC sheathed branch cables
Cross-linked polyethylene insulated PVC sheathed flame-retardant branch cables
Cross-linked polyethylene insulated PVC sheathed fire-resistant branch cable
- Q:Power cable inspection, how many meters should be sampled?
- meaning: ZR represents the flame retardant properties YJ said cross-linked polyethylene insulation V said PVC jacket ZR-YJV table red copper core XLPE insulated PVC sheathed power cable 4 * 70 + 1 * 35 said 4 core 70mm2 + 1 core 35mm2
- Q:1.2 meters below the road can use pvc tube wear armor cable?
- The former bv4 square copper wire is a single strand of hard copper wire, the latter BV4 square copper wire is multi-strand soft copper wire. Core (coredwire), with steel sheath for the outer tube filled with iron alloy powder to do core material, cross-section for the circular or rectangular line body. Also known as cored wire. It is used as a steel-making furnace outside the refining of the feed method to add refining agent and alloying agent. Can be directly added to the deep steel, the molten steel for deoxidation, desulfurization, degassing and non-metallic inclusions denatured treatment, to eliminate the aluminum deoxidized steel in the continuous casting steel | iron when the nozzle plugging the problem. As the deep addition of alloying elements in the molten steel, so the alloying element recovery rate is high and stable, the steel components can be fine-tuned to the best range. The reproducibility of the results is good.
- Q:Hello, ask about how to charge the electric car at home, use a few square millimeters of wire? How high is the demand for family lines, thank you!
- What is the current good computer configuration on the market? The price of 4000 yuan or so no more than 4000 assembly parts to write down the price Thank you.
- Q:What is the installation specification for the cable tray bracket?
- Be careful is right, but it is not necessary to be timid. Need to do so: . ask the district property, if the best road distribution map, read the drawings, you know where the cable, where not. . ask your home decoration of the electrician, he knows the most where your house where there is a wire decoration. . the general wall cabinet installed relatively high, as long as the bottom of the socket to avoid, generally all right.
- Q:PVC pipe on the GV.215-16 (C) What does it mean
- SC pipe welding fluid with welded steel pipe, the general thread connection, or casing welding connection. TC pipe is a thin-walled steel pipe, referred to as wire tube, you can thread connection, tight connection, buckle type connection, not casing welding connection.
- Q:TV tiger when the set-top box when tv / ay look for a look on the platform
- . the first two said two cables, KW is KVV that PVC insulated jacket control cable. . the control cable for industrial and mining enterprises, energy and transportation sector, for the exchange rated voltage 450/750 volts below the control, protection lines and other occasions, the use of PVC insulated, PVC sheathed control cable. . the performance difference: the power cable in the main line of power systems used to transmit and distribute high-power power, control cable from the power system distribution point of electricity directly to a variety of electrical equipment, power equipment, power lines. The rated voltage of the power cable is generally 0.6 / 1kV and above, the control cable is mainly 450 / 750V. The same specifications of the power cable and control cable in the production, the power cable insulation and sheath thickness than the control cable thick.
- Q:What is the difference between a trough bridge and a tray tray?
- Number tube, you can use the oil marker in the above to write the mark with, there are ready to write a digital, with a few numbers together to form a digital use. A line of both ends to be marked with the same mark, check to see the same mark to know is a line.
- Q:What is the warranty period for wire and cable?
- General cable maintenance period is about 15 years, but to ensure that the normal use of the environment, such as the amount of temperature is below 70 degrees, but you are more than 70 working environment to use, of course, may not be used for a year. Therefore, the most important thing is to follow the instructions to use. Wire and cable recommended Ogilvy's.
- Q:What is the length of the wire that affects voltage and electricity
- When the cable is laid on the multi-layer bracket, the cables are arranged from top to bottom, the first layer is the high voltage cable, followed by the low voltage power cable. The control cable is placed on the lower part of the power cable. At the bottom of the instrument cable, when the low voltage power cable With the instrument cable in the same layer of laying, should be added partition isolation. Computer communication coaxial cable, full length are required to shield the use of closed trunking.
- Q:What is the difference between public relations firms and media companies?
- Is the separator divides the bridge into 2 and a half, usually with two different roles of the cable at the same time laying in a cable bridge, such as the power cable with the signal cable with the bridge laying, in order to avoid electromagnetic interference, with separator separation.
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