Rubber thread in different countries have different models, each model corresponds to a certification, only through the certification to meet the conditions of the importing country. Following is a common model:
China CCC certification--YZ YZW, 60245 IEC57 YZW, 60245IEC 53YZ, YC YCW 345IE C66 YCW, and YQ, and YQW
European VDE certification--H03RN-F, H05RN-F, H05RR-F, HO7RN-F, and S05RN-F, and H03RT-H
American UL certification--SJ, SJO, SJOW, s, and SO, and SOW, SOOW, and HPN, SJOOW, and SOOW
Japan PSE certification--HHFF, PNCTFK.