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.

On June 14, 2010, our HL-31 Brazil two plug and HL-32 Brazil three plug successfully obtained UC certification.

On February 19, 2010, our newly developed product H07RN-F rubber thread successfully obtained the VDE certification.

Hongli's new product HL-1B (10A) triple plug successfully obtained CCC certification.

In response to the relevant finished home appliance standards, such as electric fans (UL507), heaters, heaters (UL1278) and fixed heating version (UL1042), new (-R) requirements for power cord UL62 have been drawn up.



In order to ensure that the products can meet the requirements of customers, Hongli has successfully increased the certification of the following types of plugs-R type power cord:

1. HL-7 adds wiring SPT-2-R and HPN-R (18 & 16AWG)

2. HL-8-01 adds wiring SVT-R, SJTW-R and HPN-R (18 & 16AWG)