How do Chinese (GB) and International naming conventions for fire-resistant cables differ?

In the international market, naming usually follows the construction materials or specific fire-integrity ratings (such as PH120 or CWZ), whereas the Chinese system uses the GB (Guobiao) standard based on functional Pinyin initials.

Chinese System (GB/T 19666): Typically identified by the prefix NH (Nai Huo / Fire Resistant). Common models include NH-YJV (XLPE insulated, fire-resistant), NH-VV (PVC insulated), and WDZN-YJY (Low smoke zero halogen, fire-resistant).

International/European System (BS/IEC/VDE): Focuses on performance codes like NHXH (Halogen-free with improved fire resistance), LIHCH (Screened halogen-free), or specific British Standards like BS 6387 types.

Mineral Insulated Cables: Known internationally as MICC or MI cable, while in the Chinese system, they are often designated as BTTZ or RTTZ.