Wire on the market sell some cheap some more expensive, some people tend to be cheaper, but cheap wire often has a lot of shorts he shows that the performance, may bring us a lot of potential safety hazard. The technical content of the wire is not too high, and the raw materials are not too different. If they are too cheap, they are either cutting corners or they are not enough. How about going to sign it? I'll give you a few easier ways to sign up:

1. Look at the packaging, the national standard wire often do better, is neat, and the hand has a quality feel.

2, to open the packaging to look at the inside of the wire, wire 1.5 GB -- -- -- -- -- 6 square wire requirement is skin (insulation thickness) is 0.7 mm thick, too thick marks, the corresponding his inner core is, sure enough, line skin you can push-pull, not easy to tear is generally is a national standard

3. Fire with fire, the 5s will be extinguished after leaving, there is a certain flame retardant function for the state line.

4. Look inside the core, the inner core material (copper), the higher the brightness of the copper, the better, and the luminosity is uniform, the luster, there is no layer sense. The national standard requires that the inner core must be free of oxygen. Non-object such as black stem copper may have accident hidden trouble.

5. The inner core of the country has certain requirements, but not very strict.But not a lot of mistakes, just a little bit, usually with the invisibility of the error.

6, the length, the country does not have compulsory must a dozen meters, but there are a lot of manufacturers also dozen meters, dozen meters of not necessarily is the national standard, but general national standard usually does not hit rice. It's only a means to beat rice.

7. the provisions of the state power lines must have a certain identity, there will be no more than 500 mm biggest type under the same identity, above the average product of trademark, name of manufacturer, standards, etc.