Guangdong Cable Factory's Method for Identifying Good and Bad Wire and Cable

Inspect the color: The core of the copper wire should have a yellowish-red hue, indicating high-quality copper material. A whitish yellow indicates low-quality copper. For aluminum-core wires, the genuine ones must be shiny, reflecting a silvery-white luster in the light, whereas those that appear dull and dark are of poor quality.

2. Bend the wire by hand to test its tensile strength; good wire should bend well without breaking. Some substandard wires will have their insulation break after a few bends, and in some cases, the insulation can be peeled off by hand.

Ensure to inspect the wire's length and the thickness of the core for any tampering. According to relevant standards, the length of the wire should not exceed a deviation of 5%, and the cross-sectional diameter should not exceed 0.02%. However, there are widespread instances in the market where there is short weight and false representation in the cross-sectional area.

We will also need to extract a section of the insulation to check if the wire core is centered within it. Misalignment is due to poor craftsmanship, resulting in a misaligned core. While it may be fine for low power usage, under heavy loads, the thinner side is likely to be punctured.

4. Consumers should also check if all labels are present, including the cable factory's name, wire model, specifications, cross-sectional area, length, rated voltage, manufacturing date, and the standard certificate number or certification mark being followed. If any of these labels are missing, consumers should never purchase the product.