To determine whether a cable can continue to be used, the following aspects need to be considered:

1. Service life: the service life of the cable is limited, if it has exceeded its design life, it needs to be replaced. Under normal circumstances, the life of low-voltage cables is 20-30 years, medium-voltage cables are 30-40 years, and high-voltage cables are 40-50 years. Of course, this is only a rough range, the actual service life will be affected by a variety of factors.

2. Appearance inspection: Observe the appearance of the cable. If there is obvious damage, crack, deformation, color change or peeling phenomenon, it may mean that the cable has been aging or damaged, and it needs to be replaced.

3. Insulation resistance test: Use an insulation resistance tester to test the cable. If the insulation resistance value is lower than the standard requirements, the insulation layer may be aging or damaged and needs to be replaced.

4. Wire resistance test: test the conductor resistance of the cable through the wire resistance tester. If the resistance value exceeds the standard range, it may mean that the conductor is broken or poorly connected and needs to be replaced.

5. High voltage test: High-voltage breakdown test of the cable, if the cable breakdown phenomenon under the specified voltage, indicating that there is a serious problem with the insulation layer, need to be replaced.

6. Consider security risks: If the cable has short circuit, leakage, overload and other security risks, or the capacity of the cable has been unable to meet the current load demand, it also needs to be replaced in time.

In general, determining whether the cable can continue to be used needs to consider a number of factors, including service life, appearance, performance test results and safety hazards. When making decisions, try to consult the relevant technical advice and follow the relevant safety specifications. If it is determined that the cable needs to be replaced, a new cable that meets the specifications and quality standards should be selected for replacement.

Qingdao Tianxing Cable Co., Ltd. focuses on the production of customized wire and cable manufacturers, main: fire wire and cable, power cable, control cable and other products, exported to more than 40 countries and regions around the world, the annual production capacity of 1 billion yuan. 6000 square meters of storage, standing hundreds of millions of inventory, order demand for rapid distribution and delivery, large prices more favorable.