Enterprise standard and equivalent GB, except for combustionproof property which is up to IEC332.

For example ：combustion proof power cable up to equivalent GB12706-91

combustion proof control cable up to equivalent GB9330-88

combustion proof installation wire and cable up to equivalent GB5023-1999 and JB8734-1998

Ⅱ Application

Addapted to occasions applying non-combustionproof cables and occasions with combustionproof requirement.

Ⅲ Character

a)         Rated voltage（U0/U）from 300/300V to 26/35KV.

b)        Highest permanent work temperature： 70℃、90℃、105℃

c)        Highest workable temperature of conductors during short circuit（5S）： nominal 70℃ 160℃；nominal 90℃ 250℃。

d)        Laying temperature higher than 0℃。

e)         Bending radius up to corresponding non-combustionproof cable standard.

f)         Combustion proof property is divided into 3 sorts:A、B、C。（B sort is not recommended）

                         i.              ZRH type combustion proof cable is used in common locales requiring standard of IEC332-3C。

                       ii.              ZRA type combustion proof cable is used in sites requiring stricter IEC332-3A standard

                      iii.              Single cable should achieve the self-quenching requirement of IEC332-1（2）。Multicore cable or a bundle of cables should pass IEC332-3, burning within a certain extent and quenching later by itself.

                     iv.              Equivalent to GB12666-90。

Ⅳ Types and Sizes

a)         Types

Form 1

Annotation：the obsolescent sort B is not presented here.

b)        Sizes

Form 2

Annotation：Other types requiring combustion proof property but excluded in these samples, should be recorded in the order as examples in Form 1, and their applying properties, scope, conditions and sizes please refer to the representation of corresponding non-combustionproof types. For convenience, ZRA and ZRC are combined into ZRA（C）in the sample，but you must mark out ZRA or ZRC in your contract，or else we will regard it as ZRC.

Ⅴ Technical properties refer to corresponding non-combustionproof cables.