Wire quality is indeed worth mentioning: even national standard wire has an allowable margin of error. Today, this process can reduce this margin of error to an extremely low level—hence the so-called national standard lower limit. In other words, although these wires all meet the same national standard, their current carrying capacity varies significantly. To avoid purchasing such inferior national standard wire, we'll teach you to consider the following five aspects when purchasing.
First, Check
No matter how inferior national standard wire may be, it's still far superior to non-standard wire. Therefore, we must first determine whether the wire meets national standards and is a qualified product by inspecting the product certificate, 3C mark, trademark, and specifications. This allows us to make a preliminary assessment of the wire's quality.
Second, Look
Strip off the insulation of a wire and observe the color of the inner wire to understand its quality. Good copper wire is purple-red and is called red copper; copper wire that's almost golden is called brass; and copper wire that's black is called "iron copper." Different copper types have varying degrees of purity, impurity content, and correspondingly different electrical conductivity.
BVR Wire
BVR Wire
Third, Touch
First, touch the conductor. High-quality conductors have a smooth, burr-free surface. Lower-quality conductors have a rougher surface, even irritating. Touch the insulation. High-quality insulation is more flexible. Scratch it with your fingernail. If it leaves a scratch, it's a poor insulation.
Fourth, Fold
Take a piece of wire and repeatedly bend it in one spot. After bending, observe the bend position to determine the wire quality.
High-quality wire will feel very flexible when bent. If the insulation turns white after bending, it's too hard and brittle, making it prone to leakage over time.
Fifth, Burn
Burn the insulation and observe its flame retardancy.
Use a lighter to light the insulation until it catches fire. Then remove the lighter and time the time it takes for the flame to extinguish. If it extinguishes within 5 seconds, it's flame retardant. If it extinguishes after a long time, even if it burns brighter, its flame retardancy is poor, so leave immediately and don't buy it.
The above content is the five steps that the editor teaches you to buy home wires. I hope it will be helpful to you.
