Case application

Where to get sheets of aluminium ?

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Where to get sheets of aluminium

My friend, I have a motor boat and i want to make it more sturdy. So I’m thinking of adding sheets of aluminium on the floor and hull sides under the seats.

I can get this from where ? Any website or shop that sell aluminum sheet?

Thank you, Daniel.

Where to get sheets of aluminium

Aluminum is an excellent material for creating lightweight boats because it does not rust easily and it is very strong in compression (bending). Many people who own aluminum fishing boats do not realize that they need to protect the surfaces with paint or varnish every year because these materials are attacked by oxygen. You should also check your local laws regarding aluminum as a structural material in your boat. In some areas they require you to use fiberglass or wood instead since all these materials don’t corrode so quickly when exposed to water. Aluminum will not rust but like any other metal if you leave salt water near it it will start to corrode which makes cleaning up messes difficult unless you remove them right away! Aluminium is used today mostly in aircraft, cars, bicycles and many other products due its light weight properties as well as being non-magnetic meaning weapons cannot affect electronics etc out of pure curiosity aluminium was discovered around 1825 by Humphry Davy after he bombarded silver chloride with calcium carbonate forming metallic calcium oxide now this substance was named after him ‘alumium’ . Aluminium has been known for thousands of years primarily for its medicinal properties but was never really considered a good metal until about 200 AD when people started using al-Ni alloy (meaning made from niobium) first found at Sesto Fiorentino Italy through prospectors searching for galena which is lead sulphide ore used at the time in making ink pens and paints among other things however they had no idea what they had found until X-ray diffraction equipment came into use during World War II scientists were able to see there were several new alloys within this sample such as Y alloy (meaning containing yttrium) then K Alloy (meaning containing krypton gas ) researchers would come across samples with small amount of metals such as germanium only added causing speculation One of the first uses for aluminium was in World War I with German planes, who were able to fly higher than their British counterparts because they used lighter planes for structural purposes as well as having better engines which gave them an advantage. Aluminium came into its own when aircraft designers discovered that it could be easily fabricated by extr auting a low melting point alloy with another metal. Aluminium alloys have many uses, one of the most common being aircrafts, spacecraft and sporting equipment. Aluminium is also used in construction due to its light weight properties it makes buildings fall into place more easily as well as lessening damage from earthquakes or other natural disasters such as fires.

Climb aluminum was used in Beijing APEC Conference Building

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Climb aluminum was used in Beijing APEC Conference Building

The Yanqi Lake “National Conference Center” project in Huairou, Beijing, as the venue of the 2014 APEC Conference, has attracted worldwide attention. The building base area of the project is 14,000 square meters, and the building area is 41,900 square meters. It is mainly a unit curtain wall structure. All curtain walls, doors and windows of the project are made of Climb aluminum.

As the most influential official forum for economic cooperation in the Asia Pacific region, the 2014 APEC Conference was held in Beijing. During the meeting cycle, there will also be APEC Business Leaders Summit, dialogue between APEC leaders and representatives of the Business Advisory Council and other business activities and leaders’ spouse activities. It was held in China 13 years after the 2001 Shanghai APEC Conference, which is of great significance.

Climb aluminum was used in Beijing APEC Conference Building

In recent years, with excellent quality and service, “Climb” brand aluminum plates have been used at the new site of CCTV Building, the New Capital Airport, the U.S. Embassy in China, the General Administration of Customs, the Chinese National Theatre, the State Environmental Protection Administration, the National Museum, the venues for the 2008 Beijing Olympic Games, the 2009 National Games, the 2010 Shanghai World Expo, the 2012 Asian Beach Games The 2013 Jinzhou World Horticultural Exposition has been widely used in the construction of venues. It is also exported to Asia, Africa, the United States, Europe and Oceania, and exported to more than 40 countries and regions such as the United States, France, Britain, Russia, South Korea, Japan and Denmark.

Points for purchasing PVC cables

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PVC insulated cable  products are divided into non-sheathed cables for fixed wiring, sheathed cables for fixed wiring, light non-sheathed flexible cables, general-purpose sheathed flexible cables, installation wires and shielded wires, and special-purpose sheathed flexible cables. Cables, PVC insulated flame-retardant/fire-resistant cables and other products.
1. Preferred products from regular manufacturers and merchants. Wires packed in reels should have a certificate of conformity, and the body of the wire should be printed with the name of the manufacturer or trademark, voltage, 3C logo, etc. Factory counterfeit and inferior wires are often “three-no” products, but they also have ambiguous origin and other signs, which is actually equivalent to not marking the origin.


2. The conductor materials used for wiring are mainly copper and aluminum. When purchasing, you should first select the corresponding specifications according to the load used. For example, the lighting circuit uses 1.5 square millimeter copper wire or 2.5 square millimeter aluminum wire, and air conditioners, microwave ovens, ovens, etc. use 2.5 square millimeter copper wires or 4 square millimeters. Choose the appropriate specifications of the aaac cable to avoid short circuit and fire caused by the insufficient current carrying capacity of the small-sized wires; secondly, pay attention to the quality of the conductors when purchasing, and the qualified copper core wires should use purple, shiny, and soft copper The copper core of the shoddy copper core wire is purple-black, yellowish or white, with a lot of impurities, poor mechanical strength, and poor toughness. It will break if you apply a little force, and if it is a multi-strand copper wire, it will often break. The service life is short.
3. The sheath used for wiring the wires is polyvinyl chloride insulating material. Qualified wire insulation should have a smooth appearance and clear printing on the surface. Observed from the wire end, the insulation should be uniform and not eccentric. The insulation layer of some shoddy wires seems to be very thick, but in fact, most of them are made of recycled plastics. Over time, the insulation layer will age and leak electricity.
4. Good quality wires are generally within the specified weight range. In terms of price, due to the low production cost of counterfeit and shoddy wires, vendors often sell them at low prices under the guise of low prices and good quality when selling.

Advantages of overhead cables

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Overhead cable introduction  (full name overhead insulated cable) is an overhead wire equipped with an insulating layer and a protective sheath. It is a special cable manufactured by a production process similar to cross-linked cables. It is between overhead wires and underground cables. The new power transmission method overhead cables are all single-core. According to their different structures, they can be divided into hard aluminum wire structure, hard drawn copper wire structure, aluminum alloy wire structure, steel core or aluminum alloy core support structure and self-supporting three-core Textured structure (the core can be hard aluminum or hard copper wire) and so on.


1. High power supply reliability. The use of overhead cables can greatly reduce various short-circuit faults (especially the common flashover faults of overhead bare wires). Compared with overhead bare wires, the failure rate is 4-6 times lower.
2. The safety of power supply is good. The use of overhead cables can greatly reduce the accidents of personal injury and death due to electric shock. The Shanghai Electric Cable Research Institute once set up a special subject to carry out the “Research and Test on Personal Safety of Overhead Cable Insulation”. Tests and calculations show that even if the insulated surface of a live cable is touched by hand, the induced current is less than 0.1mA (10kV) and 0.2mA (35kV), which is much lower than the 50-100mA lethal standard stipulated by the national electrical safety regulations.


3. Convenient erection and maintenance. Overhead cables can be erected on any kind of poles or towers, or along walls. Under special circumstances, they can also run through bushes and be directly fixed on tree poles with hardware. It can be erected on a single circuit, or multiple circuits can be erected on the same pole, without requiring a wide “electrical corridor”.
4. Reasonable economy
Although the use of overhead cables is more expensive than the use of overhead bare wires, it is cheaper than ordinary underground installation cables.

Uses of overhead insulated cables

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The overhead insulated cable series products are composed of pressed copper, aluminum (aluminum alloy) conductors, inner shielding layer, weather-resistant insulating material and outer shielding layer. They not only have the power transmission characteristics of power cables, but also have strong mechanical properties of overhead cables. Compared with bare wires, this product has the characteristics of small laying spacing, high safety and reliability, and excellent resistance to atmospheric aging.
1. Uses of overhead insulated cables
Overhead insulated cable products are a new series of products for the transmission of electric energy over overhead transmission lines, and are preferred for power grid construction and transformation of 10kV transmission lines. It is the most suitable series product for line maintenance and safety. Production of flexible copper wire core 2. Implementation standards for overhead cables
1. 1KV overhead insulated cable: GB12527-90 is equivalent to the International Electrotechnical Commission IEC60502IEC227;
2. 10KV overhead insulated cable: GB14049-93 is equivalent to the International Electrotechnical Commission IEC60502.
Third, the characteristics of overhead insulated cables
1. Rated voltage: 0.6/1KV, 10KV;
2. The long-term allowable working temperature of the cable: 70℃ for PVC insulation and 90℃ for XLPE insulation.
3. When short-circuited (the longest time is no more than 5 seconds), the maximum temperature of the cable: 160°C for PVC insulation, 150°C for high-density polyethylene insulation, and 250°C for cross-linked polyethylene insulation;
4. The ambient temperature during cable laying is not lower than -20℃


5. Allowable bending radius of cable:
(1) Cables with rated voltage below 1KV: cables with an outer diameter (D) of less than 25mm should not be less than 4D, and cables with an outer diameter (D) of 25mm and above should not be less than 6D;
(2) The rated voltage of 10KV cable should not be less than 20 (D+d). Where: D—the actual outer diameter of the cable, d—the actual outer diameter of the cable conductor. This product is suitable for the lower lead of the transformer.
4. Type, name and purpose of overhead insulated cable
JKL copper core polyethylene insulated aerial cable
JKLY Aluminum Core Polyethylene Insulated Aerial Cable
JKYJ copper core XLPE insulated aerial cable
JKTRYJ soft copper core XLPE insulated aerial cable
JKLYJ aluminum core cross-linked vinyl insulated aerial cable
JKLHYJ aluminum alloy core XLPE insulated aerial cable
JKTRY soft copper core polyethylene insulated aerial cable
JKLHY aluminum alloy core polyethylene insulated aerial cable
Overhead fixed laying of soft copper core products is used for transformer down-conductor; when laying cables, a certain distance between cables and trees should be considered, and frequent contact between cables and trees is allowed during cable operation.
JKLYJ/B soft core natural color XLPE insulated aerial cable
JKLHYJ/B Aluminum alloy core natural color XLPE insulated cable
For overhead fixed laying and cable erection, a certain distance between the cable and the tree should be considered, and frequent contact between the cable and the tree is allowed when the cable is running.
JKLYJ/Q aluminum core light cross-linked polyethylene insulated aerial cable
JKLYHJ/Q aluminum alloy core light cross-linked polyethylene insulated aerial cable
JKLY/Q aluminum core light polyethylene insulated aerial cable
JKLHY/Q aluminum alloy core light polyethylene insulated aerial cable
Overhead fixed laying; When installing cables, consider keeping a certain distance between cables and trees. When cables are running, only short-term contact between cables and trees is allowed.

There are Six Materials for the Cable

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We are commonly used are super five types of lines or six types of lines, although they are all cable, but the cable material is also divided into several kinds, most of them are in line with the national conditions of production!When buying a line, don’t be a pit!Don’t be greedy for cheap!

First, four iron four aluminum wire

Four iron four aluminum is one of the worst quality cable, transmission quality is poor, it is easy to appear attenuation.Resistance is about 50 Ω 100 m, up to transmit 60 meters.

The differences are as follows:

  1. Aluminum mesh wire, the inner layer of the wire skin without luster, A pull will be broken.
  2. The easiest way to do this is to use a magnet to attract the wire. If it is attracted to the wire, it proves that there is iron in it.
  3. The four wire cores of iron and aluminum are made of different materials. Compared with all copper, materials such as copper-clad aluminum are much harder.
  4. With fire, the hardness of iron is very high, with fire, will not be soft soon.

Two, copper clad copper wire

Copper coated copper wire refers to the bronze outside and coated with a layer of oxygen free copper, so it is also called bronze wire.This kind of wire is generally ignored by everyone, not many people understand it, the conductor of the bronze wire belongs to the secondary furnace copper, which contains more impurities.Resistance is about 100 meters, around 40 Ω can transfer about 80 meters, the oxidation resistance is strong, long service life.

The resistance of bronze is much higher than that of ordinary copper-aluminum and oxygen-free copper, so the effective propagation distance of copper-bronze is much less than that of copper-aluminum.However, the physical properties of copper is still relatively stable, not easy to oxidize, so the service life is longer, because the surface is plated with a layer of oxygen-free copper, the surface does not see any difference, but with fire, the oxygen-free copper layer on the surface of the copper will soon melt away.Generally speaking, 0.4 all-copper wire can only reach 80 meters, 0.45 all-copper wire can reach 90 meters, and 0.5 all-copper wire can reach 100 meters.

Three, copper coated aluminum wire

The material of copper cladding wire is an oxygen-free copper layer on the surface of the copper core of aluminum or aluminum/steel alloy core.Because aluminum conducts electricity less well than copper, the DC resistance of copper-clad aluminum conductors is greater than that of pure copper conductors.If used as a power supply, copper-clad aluminum conductors will incur additional power consumption and a much lower voltage.100 meters would be about 28 Ω resistance, to sell cheap and transmission can be roughly 100 meters, poor oxygen resistance, long service life.The tensile strength of copper-clad aluminum is lower than that of copper conductor.Do not pull the cable body vigorously during use.Why is copper-clad aluminum mesh wire more easily oxidized?Because copper and aluminum are two metals with different electrodes, in a humid environment, copper and aluminum also have a small amount of water vapor containing impurities to form a galvanic cell.Aluminum is the negative electrode, copper is the positive electrode, the metal aluminum is corroded, so it can not be placed in the place of high air humidity.So in the choice of cable, how to see their use is copper aluminum cable?Fire can be used, if the core of the wire is quickly softened (this identification method is very practical), it proves that the copper core of the wire contains aluminum.

Four, high conductivity aluminum mesh wire

High conductivity aluminum wire, its composition is not just copper silver composition, in fact, is a kind of copper aluminum silver alloy of high performance wire, usually also known as copper coated silver.Has a resistance is small, the characteristics of the transmission is far, compared with the copper, iron and aluminum cable, resistance would be about 20 Ω 100 meters, can transmit 120 meters, but the oxygen resistance is poor, life is not long.There are three main kinds of high conductivity aluminum mesh wire: copper coated aluminum mesh wire (aluminum in the middle, the surface is thin oxygen-free copper layer), high conductivity aluminum mesh wire (imported aluminum, copper coated surface), copper coated silver mesh wire (imported aluminum, full copper coated layer)

 

Five, copper coated silver cable

The main material of copper coated silver wire is imported aluminum, which is higher in purity than copper coated aluminum wire and high conductive aluminum wire. The inner and outer leather is made of new materials.Resistance would be about 15 Ω 100 meters, which can transmit 150-180 meters, but the oxygen resistance is poor, life is not long.Copper coated silver because it can be transmitted far, we can generally be used in ADSL, computer room, supermarket, warehouse such occasions, the general network transmission is no problem.Compared with the copper coated silver wire, the transmission speed is not so long, but it is not far away. It can also be used in supermarkets, warehouses, and families in small and medium-sized areas.There is also a small amount of aluminum in the copper – silver – coated wire, and aluminum is easily oxidized.With four or five years will probably be oxidized, so in the use of choice, to consider this factor.

We can see from the copper core wire skin, generally speaking, all copper wire is the outer new material, and oxygen free copper is inside and outside the new material.You can see from the luster of the leather and cut a section of the leather to see if it can be drawn. The bright luster is the new material, and the new material can be drawn.But now all copper wire also tends to inside and outside the new material, so it can only be used as a basic basis.

You can also use a knife to scratch a surface or cross section:

Oxygen-free copper wire: scrape off the surface of a layer, the color is basically no difference, the cross section color is uniform, no difference.Bronze wire: scratch off a layer of surface, surface and interior color difference, cross section has a little white spots.You can also use fire, copper surface coated with a layer of oxygen-free copper, in the burning process, you will find oxygen-free copper outer layer will melt, and then wipe with paper, will find that the copper core is difficult to change back to the original brass color;And oxygen-free copper does not contain impurities, in the burning process, only the surface oxidation, after wiping with paper, or restore yellow.

According to the standard, the oxygen content in the oxygen-free copper wire is not more than 0.003%, the total impurity content is not more than 0.05%, and the purity of copper is more than 99.95%.Therefore, oxygen-free copper has high conductivity, good processing performance, welding performance, corrosion resistance and low temperature performance, and is suitable for high quality wire material.Oxygen-free copper cable 10 Ω resistance is about 100 meters of less than, can transfer about 120-150 meters, the signal transmission distance, packet loss rate is low, so in high-definition monitor network engineering, network engineering and home decorating go dark lines are suggested to use oxygen free copper, network stability is guaranteed, the oxidation resistance is strong, long service life.

So here’s the problem:

The above mentioned 6 materials of network cable, two of which have a relatively high transmission distance, theory can transmit about 150 meters, copper coated silver and oxygen free copper, then which one is better?Under normal use environment, the service life of the copper coated silver wire is much shorter than that of the oxygen free copper wire. The antioxidant of the copper coated silver wire is very poor, and the longest can be used for 4-5 years. The oxygen free copper wire can be used for more than 10 years due to its high purity and high antioxidant.When using copper coated silver cable, it should be noted that whether to use copper coated silver or not depends on the service life.

A final note:

Referring to various material cable transmission distance, before mentioned their resistance, cable transmission distance has much to do with the resistance, the smaller the resistance, the smaller the loss, transport the farther the distance, can be seen from the above, oxygen-free copper cable resistance minimum, and resistance to oxidation, it is also the reason why we should choose in the actual project it.

Cable Knowledge: Classification, Use and Function of Armoured Cables

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ABC cable is made of conductors of different materials mounted in insulated metal bushing, which is processed into a flexible and solid assembly.Armoured cable is generally fixed power cable, generally speaking, is fixed in a place and basically do not move, power line transmission of electric energy.The armoured cable includes armoured thermocouple, armoured thermal resistor, armoured heater and armoured lead, which are mainly used for temperature measurement, signal transmission and special heating in chemical industry, metallurgy, machinery manufacturing, power generation and scientific experiments. The largest amount of armoured thermocouple is used.

Classification of Armoured Cables

Armoring is classified into steel tape armoring (22,23), fine steel wire armoring (32,33) and coarse steel wire armoring (42,43).

Steel tape armoured cable models are VV22, VVP22, ZRVV22, NH-VV2;

Control cable steel tape armoured cable, models are KVV22, KVVP2, KVVP22, ZR-KVV22

Steel wire armoured power cable, model VV32, YJV32, ZR-VV32

Steel wire armoured control cable Cable model KVV32 KVVP32

Armored communication cable models: HYA53, HYAT53, HYA23, HYV22, HYA22(rat proof, buried)

 

 Model Meaning of Armoured Cable

In order to enable the cable to withstand the radial pressure, double steel tape and gap wrapping technology is adopted, which is called steel tape armoured cable.After the cable is finished, the steel strip is wrapped around the cable core and the plastic sheath is extruded. This type of cable is expressed as control cable KVV22, plastic cable VV22, communication cable SYV22, etc.The two Arabic numerals in the subscript of the cable type, the first one: “2” means double steel tape armoured;The second: “2” represents the PVC sheath, such as the use of polyethylene sheath to change the “2” to “3”. This type of cable is generally used in the bearing pressure is relatively large occasions.For example: through the highway, square and vibration of the highway, railway side, etc., suitable for buried, tunnel and pipeline laying. In order to make the cable able to bear large axial tension, the cable is wrapped with several low carbon steel wires, which is called steel wire armored cable.After the cable is finished, the steel wire is wrapped on the core wire according to the necessary pitch and then the sheath is extruded. The representation method of this cable type is such as control cable KVV32, plastic cable VV32, coaxial cable HOL33, etc. Two Arabic numerals in the model, the first one: “3” represents fine steel wire armor;Second: “2” for PVC sheath, “3” for polyethylene sheath.This type of cable is generally used in large span, laying the occasion of large drop.

Application of Armored Cable

Armour cable mechanical protection layer can be added to any structure of the cable, to increase the mechanical strength of the cable, improve the ability of corrosion resistance, is designed for the vulnerable to mechanical damage and erosion of the area.It can be laid in any way, and it is more suitable for direct buried laying in rock areas. Armoured cable is generally fixed power cable, generally speaking, is fixed in a place and basically do not move, power line transmission of electric energy. In addition to the above purposes, the cable with armoured layer can also enhance the tensile strength, compressive strength and other mechanical protection to extend the service life. Armour has a certain resistance to external force, but also can be wary of rat bite, not through the armor caused by power transmission problems, the bending radius of the armor should be large, the armor layer can be grounded, protect the cable. Foreign armoured cable production is mainly concentrated in several more developed countries, such as the United States, Britain, Japan, Germany, Russia, Southeast Asia has no manufacturers, but as long as there are chemical, metallurgy, machinery manufacturing, power generation and other industries where there is temperature measurement, the need for armoured cable.

The Role of Armoured Cable

Armoured cable refers to the cable with metal armored protective layer. The purpose of the cable with armored layer is not only to enhance the tensile strength, compressive strength and other mechanical protection to extend the service life, but also to improve the anti-interference performance of the cable through shielding protection. The commonly used armoring materials include steel strip, steel wire, aluminum strip and aluminum tube, among which the steel strip and steel wire armoring layer has high magnetic permeability and good magnetic shielding effect, and can be used to resist low frequency interference, and can make the armored cable buried directly without penetrating the pipe, and is cheap and fine, so it is widely used in practice.

Safe Use of Cable: How to Prevent Wires and Cables from Catching Fire Due to Overload of Wres

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Wire and cable in the process of operation, due to the existence of resistance will be heated.The resistance of the wire is generally very small, and its heating power can be expressed by the formula Q =I^2R.Q =I^2R indicates that: for a section of wire in use (R has been basically constant), the greater the current through the wire, the greater the heating power;If the current constant, then the wire heating power is constant.The heat released during operation will be absorbed by the wire itself, thus causing the temperature of the wire to rise.

Although the wire is constantly absorbing the heat released by the current in the process of operation, its temperature will not rise unlimitlessly.Because while the wire is absorbing heat, it’s also releasing heat into the outside world, and it turns out that the temperature of the wire increases gradually when it’s energised until it stays at a certain point.At this constant point, the heat absorption and release power of the wire are the same, and the wire is in thermal equilibrium.There is a limit to the ability of wires to withstand higher temperatures, and operating above a certain maximum temperature may be hazardous.This maximum temperature also corresponds to a certain maximum current, above which the wire is overloaded.Overloading of the wire directly causes the temperature of the wire itself and the objects nearby to rise.Rising temperatures are the most direct cause of such fires.

Overload causes the insulation layer between the two wires to be damaged, causing a short circuit, burning down the equipment and causing a fire.The double wire is separated by the insulation layer between them. Overload makes the insulation layer soften and destroy, which leads to the direct contact between the two wires, causing short circuit and burning equipment.At the same time, the high temperature generated by the large current at the moment of short circuit causes the line to catch fire and fuse, and the molten beads generated fall to the combustible material to cause the fire.Overload temperature rise can also directly ignite nearby combustibles.The heat transfer of overload wire raises the temperature of combustibles nearby, and it is possible for combustibles nearby with low ignition point to ignite and cause fire.In the storage of flammable goods in the warehouse and the use of easy, combustible decoration of the building, this risk is particularly prominent.

 

The overload also puts the connections in the line under conditions of overheating, which speeds up the oxidation process.Oxidation makes the connection point produce a thin layer of oxide film, which is not easy to conduct electricity. The oxide film increases the resistance between the contact points, resulting in ignition and other phenomena, causing fire.So, how to prevent the overload of wires and cables caused by fire?

In the process of line design, we should accurately check and ratify the capacity of the site, fully consider the possibility of new capacity in the future, and choose the right type of wire.Large capacity, should choose a thicker wire.Circuit design and reasonable selection are the key steps to prevent overload.If the design selection is not correct, it will leave a congenital hidden danger that is difficult to rectify.Some small projects, places not serious design and selection.Arbitrary selection and laying of lines, this is very dangerous.New electrical appliances, electrical equipment should be fully considered the bearing capacity of the original line.If the original line does not meet the requirements, it should be re-designed and transformed.

The line should be laid by qualified electricians according to the relevant specifications.The laying conditions of the circuit directly affect the heat dissipation of the conductor.Generally speaking, the line laying should not pass through easy and combustible materials and stacking, which will lead to poor heat dissipation of the wire and heat accumulation, resulting in the possibility of igniting combustible items around, and increasing the risk of fire caused by overload;The lines laid in the ceiling of the decoration of public entertainment places should be protected by steel pipes to separate the ceiling from the line. In the case of overload and short circuit, even if there are molten beads, they will not fall off to avoid fire.

Strengthen electricity management, avoid disorderly wiring, random wiring, careful use of mobile socket.Disorderly wiring, random wiring, the use of mobile socket is actually in a certain line to add electrical equipment, increase the current and may cause overload.The jack of the mobile socket is obviously more than the fixed socket on the wall. If too much electrical equipment is used on the mobile socket, the original line must be difficult to bear.Separate lines should be set for high-power equipment and electrical appliances, and mobile sockets should not be used as wiring sources.

Accelerate the renewal and transformation of old lines to eliminate fire hazards.Old enterprises, old residential areas and other units, due to the use of a long time, many lines have been aging, more than the service life.Even if the carrying capacity of some lines is not large, the aging lines are difficult to bear such carrying capacity, and also have the risk of overload.Especially in the old residential areas, the lines have long been aging, but with the improvement of people’s living standards and the increase of household appliances, the electricity consumption is still rising year by year, which is really worse.For old lines, we should timely supervise and coordinate, and promote their rectification as soon as possible, so as to eliminate fire hazards and ensure safety.

A qualified cable, these steps can not be less

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A qualified cable, which can not be short of 600V Overhead Aerial cable 54.6m㎡ as a means of transmitting electrical energy and communication signals, is undoubtedly the existence of blood vessels and nerves in the modern era of the Internet, is the key to manufacturing in most industries today.

Chinese cable industry is now a large-scale, is a major international cable manufacturing country, the domestic cable manufacturing industry is only the second largest manufacturing industry after automobiles, but the huge industry has also spawned a lot of chaos and speculators, many small cable enterprises, in order to seize the market, maliciously underpricing, producing unqualified cable and wire without enough work and materials, and even worse, using fake cable and wire to list well-known cable and wire brands for sale, has had a very bad impact on the industry.

In the production of cable, in strict accordance with the production requirements and procedures, and conduct a comprehensive testing and testing to ensure that URD Cable out of the factory is of high quality, today to talk about the production of a qualified cable, what are the key steps? First of all, of course, it is strictly controlling the purchase of raw materials.

If it is a good raw material, then the quality and life performance of the cables produced will be greatly reduced. Meanwhile, Shenghua cable will strictly control the purchase, production, transportation, sales and other links, compare the raw materials from the suppliers in all aspects to ensure that the raw materials obtained are of high quality and durable; with good production materials, the next step is the production process. Huaxing cable has the latest cable production equipment.

During the production process, it also requires operators to work strictly in accordance with the requirements, whether it is extrusion machine series, drawstring machine series, stranding machine series, wrapping machine series, Huaxing cable are to achieve strict production requirements. Inspection is the most important link in the cable production process, Shenghua cable is of course also attached great importance to, for a long time, huaxing cable has always insisted on the survival of quality, to ensure safety, to service credibility, to management to promote efficiency, to forge ahead. Through the strict check and inspection of each link of the production cable, the product quality is ensured and the customer requirements are met.

Why should the length of power cable be reserved?

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It is very difficult to repair and replace600V 90°C XLPE ACWU90 AC90 Cable, especially when the middle section is in trouble, because the cable is laid in the open, the bridge, the buried, the cable trench and the pipe. So in the cable laying is required to reserve. Not only in the cable trench in the feeder, but also to reserve the end; if it is tube or cable trench laying, in the middle of the maintenance wells to reserve a certain length.

Advantages: When the power cable is connected to the feeder circuit or equipment, the copper nose needs to be pressed and the outer protective layer of the cable needs to be removed And the distribution cabinet, control cabinet itself is also relatively easy to affect the cable, so the cable in both ends need to reserve a certain length to deal with the subsequent maintenance.

Otherwise, it will be difficult to deal with the problem in the figure below. The advantage of the reserved maintenance well: When the power cable is laid secretly, a maintenance well must be set up at a certain distance, which is mainly used to deal with the inspection and repair of the fault in the middle part ofPVC XLPE Insulated Power Cable 25mm² ~ 400mm². If a section is damaged by external forces or problems, the amount reserved in the manhole can be used nearby, making maintenance convenient and time-saving. Otherwise, it is very difficult to deal with the following problem.

Other benefits: due to the general cable laying path is generally more complex, often need to turn bend, calculation of cable length can not be accurate, appropriate length can also be reserved for laying a variety of special circumstances.