Optional elements of cable

Wire and plug in terminal block as the main carrier of power transmission, are widely used in electrical equipment, lighting, household appliances and other lines, its quality directly affects the quality of the project and the life and property safety of consumers. There are a lot of wire varieties on the market, want to use the appropriate wire according to the power load your.
On the market sell wire some cheap and some more expensive, some people often but to relatively cheap, cheap, wires, often have many did not reach the performance that he shows, there may bring many security hidden trouble to yourself. Production technology content of wire is not too high, the raw material is not much difference, if cheap too much, or cut corners, or the number of not giving enough. How to identify it. I give you several methods for easier identification:
1, to look at the packaging, GB wires tend to do relatively well, neat, hand up have a sense of quality.
2, to open the package to see the inside of the wire, the wire GB 1.5 - -6 square wire requirement is thick skinned (insulation thickness) is 0.7mm, too thick is non-standard, corresponding to his inner core is sure enough, line skin you can force pull, not easy to tear is general is the national standard of
3, with the fire, extinguished within 5S after leaving, have certain flame retardant function for GB line.
4, look at the inner core, the inner core material (copper) brightness higher copper is better, and photometric mini hdmi cable uniform, shiny, no sense of hierarchy. The national standard requirements within the core must use oxygen free copper. Non standard such as black rod copper, there may be hidden dangers of accidents.
5, the thickness of inner core countries have certain requirements, but not very strict. But not a lot of mistakes, only a very small a little bit error generally with the eyes of the.
6, length, no compulsory must play meters, but there are many manufacturers also played meters, not necessarily GB dozen meters, but the General GB generally not dozen meters. Non standard dozen meters that is only a kind of means.
7, the provisions of the state on the wires must play a certain identity, the maximum not more than 500mm have identified the same next play out, above the general product trademark, factory name, the implementation of standards

Name of product structure and material of cable

(1) the wire: the most basic essential main component products are current or electromagnetic wave information transmission function.
Main material: the wires are electrically conductive wire core referred to, made by conductive properties of copper, aluminum, copper clad steel, copper clad aluminum and other non-ferrous metal with excellent, optical fiber as the wire.
A bare copper wire, tinned wire; single branch, strand; twisted tinning line.
(2) the insulating layer is coated components: plays a role in wire electrical insulation periphery. That can ensure the transmission of current or electromagnetic waves, light waves travel along the wires and not only flow to the outside, the conductor has the potential (i.e. potential on the formation of the surrounding objects, namely the difference voltage) can be isolated, i.e., both to ensure the normal transmission function of the wire, but also to ensure that the external object and personal safety. Conductor and the insulating layer is composed of terminal block products (except the bare wire) two basic components must have. Main material: PVC, PE, XLPE, PP, F, polypropylene fluorine plastics, rubber, paper, mica tape
(3) filling structure: a lot of wire and cable products are the multi core, these insulating wire core or lines on the cable (or packet multiple cable), a shape is not round, two is an insulating cable core has the very big space, and must join the filling structure in the cable, filling knot the structure is to make the cable outer diameter relative round in favor of bag, extrusion sheath. Main material: PP rope
(4): is a kind of shielding barrier terminal block products in the field and outside electromagnetic isolation components; cable products from different lines in its internal (or group) to also need mutual isolation between. The shielding layer can be said to be an "electromagnetic screen". The conductor shielding of high voltage cables and insulation shielding to electric field distribution homogenization. Main material: bare copper wire, copper clad steel wire, tinned copper wire
(5) layer of protection: when the electric wire and cable products running in different environments, must have on the overall product, especially for the insulating layer protective component, which is the protective layer.
Because the requirements of insulating material has excellent variety of electrical insulation properties, must demand extremely high purity and impurity content of materials; often fail to take into account their on the outside of the protection ability, so for the outside world (i.e., installation, application occasions and in various mechanical force) bearing or resistance, resistance to atmospheric environment, chemical resistance or oil, to prevent biological invasion, and reduce the fire hazards must be composed of various protective layer structure to bear. Main materials: PVC, PE, rubber, aluminum, steel strip
(6) the tensile element: the typical structure is a steel core aluminum stranded wire, fiber optic cable and cable etc.. In a word, the development of special fine, soft, also requires repeated bending, distorting the use of products, the tensile element plays a major role in.

The introduction of fixed head

Cable sealing sleeve is a suitable connection cable power supply, also can protect the cable, so it won't escape. Cable sealing device is placed in different categories,depending on whether the glands for general processing industry or in need of protection, prevent the risk is too high or the explosion temperature. Into the armored cable glands or no armoring layer and a different type of gland will be required for each variety. The gland itself, can be made of metal, such as copper or aluminum, or plastic, the material is useful in different environments.

When the electrical work is completed, it may be no cable sealing, to ensure theelectrical equipment wire, but there are several reasons, this is a bad idea. Glandsprovide sealing power, so as to ensure that the RCA audio cable will not slip during operation.Security is also provided, because the cable gland to ensure that electricity can not attached to anyone nearby, causing bodily harm. Glands usually provide other safety features, such as the earth wire or insulated cable.

To have two categories: Industrial and hazardous for RCA video cable sealing. Industrial cablesealing joint is a general use of the gland, in order to meet the requirements ofgeneral risk, so it is useful or dangerous explosion in high-temperature environments.If the environment is harmful substances, the use of dangerous gland, because these glands to meet additional requirements necessary. They are fortified with extra, so that they can resist common glands cannot withstand the temperature and external forces.

Two types of cables can be sealed sleeve is classified as armored or unarmoredcable into, which will play glands work will rebound. Armored cat6 ethernet cable will need a gland,can clip into the wire, and the ability to terminate the energy from the armor part. Nonarmoured line does not require termination, but the glands need highly protected andpreserved, in order to maintain the safety of wire.

Most cable gland cell is made from brass, which is considered, as a general materialis resistant to corrosion and electrical conductivity. In the aluminum and the presence of moisture at the same time, the corrosion of brass can start. Brass is often associated with other metal plating, to make the gland is stronger, better corrosion.Plastic is often used as an alternative to metal glands.