How to check whether the wire is aging?
We all know that when the cables for household or commercial use are aging, if the business continues to use them, it is easy to cause danger. But how to check whether the wire is aging still requires a certain skill.
The wire is mainly insulated by the outer layer of the sheath. Over time, it is corroded by corrosive gases, and the insulation performance is gradually reduced, slowly aging and hardening, becoming brittle or falling off, and then it will not function as insulation. In fact, the direct cause of the aging failure of wires and cables is the breakdown of insulation due to reduced insulation. Now I will teach you how to judge whether the wires are aging, check them in time, and eliminate potential safety hazards.
1. "Check the appearance along the wire, it will darken and hard cracks will be seen. Bend the wire with both hands to insulate, and the rigid and cracked outer skin will disperse." It means to observe the insulation layer along the wire, if the color of the insulation layer is tarnished, darkened, or changed. Hard, cracked, partially detached.
When the insulated wire is bent with both hands, the wire is stiff, and even the insulation layer is cracked, the insulation layer is peeled off, etc., which shows that the wire has experienced different degrees of aging and serious aging.
2. "Accurate method to measure insulation, the megohm is not low. The humidity value can be small in rainy days, and the value can be reduced by half." It means that the insulation resistance meter can be used to measure the insulation of the electrical line to judge the insulation condition of the line more accurately.
The insulation of different lines has different allowable values. For example, the insulation resistance of the 220V line in use should not be lower than 0.22 megohm; the humidity value in rainy days should not be less than 0.1 megohm. If the measured insulation resistance value is less than the above value, it means that there is a problem with the insulation of the electrical line. Of course, under different usage conditions, the service life of the cable is different, which requires everyone to deal with it according to the situation!
Foshan Yuejiaxin Wire &Cable CO. LTD. Is a manufacture specializing in the production of wires and cables. The properties of SIMSHENG wires and cables produced by the company meet the requirements of the international Electrotechnical Commission and national standards .The main products are: PVC-Insulated Cable; XLPE-Insulated Power Cable; Low Smoke Zero Halogen LSZH Cable; Fire-resistant Cable; Mineral Insulated Fireproof Cable.
