Sometimes you will confuse with the lan cable in the market, that many suppliers provide bare copper cable with a big difference of price. As there is a saying that One Cent, One Quality, you have to think about that there must be some quality differences. Generally, there are two types bare copper: one is None-Oxygen copper, another is Bronze, both of them are named as Pure Copper in the market. So, we will explain you some basic reasons and teach you how to identify the bare copper. First, you need to know the different features between them:
None-Oygen copper is made of high-purity cathode copper, the melt is covered with calcined charcoal, and the oxygen content of copper produced under sealed conditions is below 0.03%; Bronze is a copper with the highest copper content, the ordinary copper is the mass fraction of copper not less than 99.7%, the miscellaneous mass is very little oxygen-containing copper, the appearance is purplish red, so it is also called copper.
2. Different resistivity.
None-Oxygen copper wire as conductor is high purity, low resistance, generally not more than 30Ω, the allowance deviation is 3Ω, means the no more than 27-33Ω; Bronze copper wire contains more impurities, high resistance, generally the resistivity is about 110Ω.
3. Different transmission distance.
The transmission distance of None-Oxygen copper wire is able to reach about 150 meters,and with a very stable effect within 120 meters;And the bronze copper wire can reach only 100 meters, and stable effect within 80 meters.
With a site test in Dubai, Bolein CAT6 UTP indoor lan cable reach to 280 meters when used as a CCTV data transmission.
4. Different lifetime.
Due to the oxygen content of None-Oxygen copper is very low, it is not easy to oxidize, which can serve longer time. It is suggested to be distributed as concealed wiring. Bronze copper containes more impurities, and affected by surrounding factors, the service life is not as long as that of None-Oxygen copper.
How to identify them?
There are some basic methods that we can suggest:
- Check the corss-section of the wire. Bronze copper is coated a layer of None-Oxygen copper generally, so the color will be a little different between inside and outside; Also remove some on the surface, if the color is same, it is None-Oxygen copper; if the color is not same, it is bronze copper.
- Burn the wires by lighter. When the wires was burned in 20 seconds, if the color is slightly red and yellow, it is None-Oxygen copper; if the color is yellow only, it is bronze copper. (generally, this method is very difficult for none-professional people).
- Check the outer coating material. Normally, these suppliers who use bronze copper to pretend as None-Oxygen copper, they will not pay more investment on other materials also, such as outer coating, they will use recycle material which is easily to be identified.
Of course, the most accurate method is to be chemical tested. And please be noted that One Cent, One Quality, it is not reasonable to get anything with High Quality but Low Price.