The moment the laptop adapter plug is inserted into the socket, there will be a "buzz" sound and sparks appear; when the mobile phone charger plug is inserted into the socket, sparks will sometimes flash out from time to time; ...

Oxidation and blackening of the conductor copper wire of the wire is caused by many reasons, mainly in the following four aspects: 1. The reason for the PVC coating, the PVC is exposed, and the wire end is not sealed;



2. The quality of the copper wire itself has too many impurities;



3. Storage problems, damp warehouse, etc.;



Fourth, production process issues. The production process is not strictly according to the standard process or there is water in the production process.

2004 was the year when the country implemented macro-control. Due to the strong demand in the power, communications, transportation, transportation, home appliances and other sectors closely related to the wire and cable industry, the main economic indicators of the wire and cable industry have continued to grow.

The National Industrial Product Production License Office approved and issued the "Implementation Rules for the Replacement (Issuance) of Wire and Cable Production Licenses" with Document [2005] No. 11. From May 26 to 27, 2005, the Supervision Department of the General Administration of Quality Supervision, Inspection and Quarantine, the Quanxian Office, and the Wire and Cable Production License