2015年8月18日星期二

How you can Select a Correct Standard of Cable?



Because the main carrier of energy transmission, cable is widely used in electrical gear, lighting circuit, household appliances and so on. The high quality from the cable is straight impact the engineering high quality, and the safety of life and home of customer. There are lots of Cable Manufacturers in the market, and there are also numerous varieties of cable. You need to select proper cable based on the use of electricity load. You can discover associated models and specifications within the cable specification.
Generally, whenever you select a wire and cable, except electrical wire size and electrical wire price, you need to also notice some particulars as beneath.
To begin with, you need to choose right wire and cable types. At this time, you need to consider the purpose, the laying conditions and safety, for instance: based on the different utilizes, you are able to select energy cable, aerial insulated cable and manage cable; based on the various laying circumstances, you can choose general plastic insulated cable, Screened Manage Cable, steel tape armoured cable, Armoured Power Cable, anti-corrosion cable and so on; according to the safety requirements, you are able to choose the flame retardant cable, halogen free flame retardant cable, fire cable, and so on..
Secondly, the choice of the regular of wire and cable. Whenever you have to make sure the specification of wire and cable, usually, you should think about heating, voltage loss, financial current density, mechanical strength and so on.
According to the experience, for the low-voltage power line, due to its bigger load current, you need to consider the section initial based on the conditions from the heating, and after that check the voltage loss and mechanical strength. For low voltage lighting line, it features a higher specifications on the voltage level, you need to choose the section according to the permissive voltage loss situation, then checking the heating conditions and mechanical strength. For higher voltage transmission lines, firstly, you need to choose section according to economic current density, and after that verify the heating conditions and permit voltage loss. For higher voltage overhead line, expect the section, heating circumstances, you also should think about its mechanical strength. When the user has no encounter, some expert units or people will provide some suggestions for you.
Lastly, you should select the Cable Manufacturer. There are lots of variations between the various goods supplied by different Cable Manufacturer even they've the same name or exact same size. The inner material is very essential to get a cable. A great cable, it adopt good copper or some other high conductivity metal, but you cannot verify it by yourself, so you should choose a Cable Manufacturer who has a higher inspection regular and high quality requirement.

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