How to determine if the copper wire raw material is in good quality

Nowadays, many manufacturers use inferior copper to impersonate oxygen-free copper. As a result, the resistivity is too large, and the cable is prone to heat, which not only lead to a short service life but also a large safety hazard. Examples of death and property loss is all around us. Many are caused by flame or fires generated from poor quality cables. Rados keep on using the best copper to produce wires and cables. The conductor is made of high quality oxygen-free copper with 99.99% purity. The color is in reddish bright. It’s anti-oxidation. Rados makes sure they’ll work in good performance with stable and higher electrical conductivity, low resistance, low heat generation and strong current load capacity.

The resistivity directly affects the loss of electricity during transmission. The smaller the conductor resistance, the more cost-effective and safe it is.

The following are some tips for you to determine if the copper wire is in good quality.

1. Compare the gloss from the end of copper wires. 99.99% high purity oxygen-free copper is in bright reddish color.

2. Check if copper is annealed. The annealed conductor resistance is reduced by 8%. The maximum load is increased by 10%. The power consumption is 8% less under the same load. Flexible cables are soft and knottable. Solid or stranded cables are bendable and have no creases after bending. Rados Cable conductor is flexible and can be bended more than 60 times before they are broken. The conductor of some other brands are hard and easy to break after 40 times bending.

3. Identification of copper-clad aluminum (CCA) conductor. CCA cables age quickly and have a large voltage drop not to mention security risks.

a. Flame the conductor. Pure copper has a distinct melting point. CCA conductor will bend obviously.

b. Scrape the surface of conductors with a blade. Pure copper will be still bright in reddish color. Aluminum can be seen in cca. The other similar way is to observe the end of conductors. Pure copper will be in uniform color while it’s white in the middle of cca conductors.

c. Weighing. The density of cca is much lighter than that of copper. You can feel it directly by holding one coil of copper wires first and one coil of cca wires afterward.

4. Always say NO to copper clad steel cables. They generate too much heat. Just imagine it.

2019-02-12T06:34:11+00:00 November 7th, 2018|Cable Knowledge, Cable Raw Material|