特种电线电缆 >> Fireproof Cable >> Fireproof Cable
 
  
Product No：
 71314334416
Product Name：
 Fireproof Cable
Specifications：
Products Remarks：
Product Categories：
 特种电线电缆
 
    Product description
 

Fireproof Cable

Fireproof Cable
This kind of cable has the stipulated fireproof performance(including fireproof
characteristcis, materials, smoke formation, toxicity in smoke production of materials).
Mark of fireproofing: NH
Symbol of fireproof classification
Flame intensity is divided into Category A and Category B according to Standard GB/T12666.6.
Fireproof classification is divided into four level. Every level is divided into Category A and
Category B in terms of flame intensity. Symbols of fireproof levels are respectively listed as follows:
Level Ⅰ Category A: IA Level Ⅰ Category B: IB
Level Ⅱ Category A: IIA Level Ⅱ Category B: IIB
Level Ⅲ Category A: IIIA Level Ⅲ Category B: IIIB
Level Ⅳ Category A: Ⅳ A Level Ⅳ Category B: Ⅳ B
Level of Fireproof Performance and Technical Requirements
Item Level of Flame Retardance Fireproof characteristcis Toxicity of Smoke Gas（Consistency）mg/L Smoke Density （Minimal Light Transmittance）（%）
Test Conditions Technical Index
Applied Voltage to Test Sample（UO/U)/V Firing Temperature ºC Duration of Ignition min
Level Ⅰ Fireproofing IA Stipulated Rated Voltage of Product 950～1000

90

 3A fuse hasn’t been burnt out

≥12.4

≥80

IB 750～800
Level Ⅱ Fireproofing IIA 950～1000

≥60

IIB 750～800
Level Ⅲ Fireproofing IIIA 950～1000

≥6.15

≥20

IIIB 750～800
Level Ⅳ Fireproofing IVA 950～1000

/　

/　

IVB 750～800
Note: IVA and IVB can also represent A and B, respectively.
Brief introduction of various cables of common specifications are as follows.

Model Nominal Sector Core of Conductor Referred Outside Diameter of Finished Products mm Resistance of Conductor at 20℃ Ω/Km Insulated Resistance at 70℃ or 90℃ ≥K Ω.M
Copper Core Tinned Copper Core
NH-BV

1

1/1.13

3.53

18.1

18

0.011

1.5

1/1.38

3.98

12.1

12

0.011

2.5

1/0.78

4.58

7.41

7.6

0.01

NH-RVS

1

32/0.20

8.28

19.5

20

0.01

1.5

48/0.20

9.28

13.3

14

0.009

2.5

77/0.20

10.58

7.98

8.2

0.008

NH-BVS

1

1/1.13

7.86

18.1

18

0.011

1.5

1/1.38

8.76

12.1

12

0.011

2.5

1/1.78

9.96

7.41

7.6

0.01
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