The quality of wires and cables is related to thousands of households. Many electrical fires are caused by unqualified wires and cables. Therefore, how to choose high-quality wires and cables is also a skill! The editor below will take you to analyze from the following six aspects.

1. Check the CCC certification mark. Wire and cable products are national compulsory safety certification products. All manufacturing companies must obtain CCC certification from the China Electrical Products Certification Commission and have the CCC certification mark on the certification or products.

2. Looking at the inspection report, wires and cables, as products that affect the safety of people and property, are listed as the focus of government supervision and inspection. Formal production enterprises should accept regular inspections by regulatory authorities. Therefore, suppliers should be able to provide inspection reports from the quality inspection department, otherwise, the quality of wire and cable products will have no basis.

3. Look at the packaging. All companies that produce products in accordance with national standards attach great importance to product packaging. When purchasing, pay attention to exquisite packaging, clear printing, complete models and specifications, and the factory name and address.

4. Look at the appearance. The appearance of high-quality wire and cable products meets the standard requirements, and is smooth, round and even in color. Counterfeit products have a rough, dull appearance. The rubber insulated flexible cable is round in shape, and the sheath, insulation and wires are not easy to fall off. Fake and shoddy products have a rough appearance, large ovality, and low insulation strength of the sheath, which can be torn by hand.

4. Look at the conductor. The wire is smooth, and the DC resistance and wire size comply with national standards. Wire and cable products that meet national standards. Both aluminum conductors and copper conductors are bright and have no oil stains, so the DC resistance of the conductors fully complies with national standards. Good electrical conductivity and high safety.

5. Measure the length of wires and cables. Length is the main intuitive method to distinguish fake and shoddy products that meet national standards. When purchasing, do not be greedy for cheap and choose wires and cables whose actual meters are smaller than their nominal meters. Length must match nominal meters. The allowable error stipulated by the state is 0.5 meters per 100 meters.

Performance requirements for wires and cables

1. Electrical properties, that is to say, the conductivity of the cable. Cable products require good conductivity, and individual products require a certain resistance range. For electric motor products, cables are a key factor in connecting the motor windings and driving devices, and they require electrical insulation and insulation. Special-purpose cables also require transmission characteristics, that is, the high-frequency transmission characteristics and anti-interference characteristics of the cable.

2. Mechanical properties, which mainly include tensile strength, elongation, bending, elasticity, flexibility, vibration resistance, wear resistance, mechanical impact, etc. After the motor product is connected to the motor winding with a cable, it must pass through the base connection hole and the terminal board. For low voltage high power and high voltage motors, the number of lead span parts may be greater. Therefore, the requirements for mechanical properties and insulation properties have increased, and it is also important to take necessary protective measures for cables.