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Flame-retardant and non flame-retardant PVC insulation power cable
Executive Standard:GB/T12706-2008、GB/T196662005
Application:fixedly laid in the line of rated alternating voltage for transmitting and distributing electric power.
Service conditions:
1、Allowable highest long-time working temperature of cable core is 70℃,core short-circuit temperature should not excee 160℃,the longest time length should not exceed 5 seconds.
2、Installation ambient temperature should be no less than 0℃.
3、The allowable bending radius during cable installation is as follows
Item |
single core cable |
three-core cable |
||
Non-armored |
Armored |
Non-armored |
Armored |
|
The minimum bending radius of cable during installation |
20D |
15D |
15D |
12D |
Minimum bending radius of cable close to connection box and terminal(but the bending should be controlled carefully and molding guide plate should be adopted) |
15D |
12D |
12D |
10D |
Remark:D is cable outer diameter |
Cable model, name and use range
model |
name |
use range |
VV |
PVC insulation PVC sheath power cable |
When laid indoors, in tunnel and pipe, the cable cannot bear pressure and external mechanical force |
VV22 |
PVC insulation steel wire armored PVC sheathed power cable |
When laid indoors,in tunnel and soil, the cable can bear pressure and other external forces |
VV32 |
PVC insulation thin steel wire armored PVC sheath power cable |
When laid indoors,in mine and water, the cable can bear large tensile fore |
VV42 |
PVC insulation thick steel wire armored PVC sheath power cable |
When laid in vertical occasions such as vertical shaft and underwater, the cable can bear large axial tensile force |
ZR-VV |
PVC insulated PVC sheath flame-retardant power cable |
When laid indoors, in tunnel and pipe, the cable cannot bear pressure and external mechanical force |
ZR-VV22 |
PVC insulation steel wire armored PVC sheath flame-retardant power cable |
When laid indoors,in tunnel or when directly buried underground, the cable can bear pressure and external mechanical force |
ZR-VV32 |
PVC insulation thin steel wire armored PVC sheath flame-retardant power cable |
When laid indoors,in mine and water, the cable can bear large tensile fore |
ZR-VV42 |
PVC insulation Thick steel wire armored PVC sheath flame-retardant power cable |
When laid in vertical occasions such as vertical shaft and underwater, the cable can bear large axial tensile force |
﹡Medium model is aluminum core