What is wire and cable? How is wire and cable purchased?

Wire and cable used to transmit electrical (magnetic) energy, information and electromagnetic energy conversion wire products, wire and cable in the broad sense of the term is also referred to as cable, the narrow sense of the cable refers to the insulated cable, which can be defined as: a collection of the following parts; one or more insulated cores, as well as their respective insulation may have a covering layer, the total protective layer and the outer layer, the cable may also be additional to the conductor is not insulated. Wire products used to transmit electrical (magnetic) energy, information and electromagnetic energy conversion.

-I. How is wire and cable purchased?

Wire and cable as the main carrier of power transmission, widely used in electrical equipment, lighting lines, household appliances, etc., the quality of its quality directly affects the quality of the project and the consumer's life and property safety. In the market there are many varieties of wire, according to their own electrical load to use the appropriate wire. To give you a few easier to identify the method: 1, look to see the packaging, the national standard wire tend to do better, neat, hand up a sense of quality. 2, to open the package to look at the wire inside, the national standard wire 1.5 - 6 square wire requirements is the thickness of the skin (insulation thickness) is 0.7mm, too thick is non-standard, and accordingly, his inner core is Definitely not enough, you can pull the wire skin, not easy to tear is generally the national standard 3, burn with fire, leave the 5s extinguished, there is a certain flame-retardant function for the national standard line. 4, look at the inner core, the inner core of the material (copper), the higher the brightness of the copper the better, and the luminosity of the uniformity, luster, no hierarchy. National standard requirements core must be oxygen-free copper. Non-standard, such as black rod copper, there may be potential accidents. 5, the thickness of the core has certain requirements, but not very strict. But will not be wrong a lot, just a very small bit, usually with the eye can not see the error. 6, the length, not mandatory to hit the meter, but there are a lot of manufacturers also hit the meter, hit the meter is not necessarily the national standard, but the general national standard is generally not hit the meter. Non-standard meter that is just a means. 7, the provisions of the wire must be hit with a certain logo, larger than 500mm will have the next same logo hit out, above the general product trademarks, manufacturer's name, implementation standards.

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