NFR-3 stranded 7x2,5mm²

Description

Description

Standards

  • National
    KS C IEC 60502-1; KWS 408

Application

Low-toxic and heat resistant cable for fire alarm in the residential and commerical building. 
 

Standard

K 60502-1

KWS 408

 

Construction

1. Conductor: Solid conductor (Class 1), Annealed copper stranded conductor, Class  2

2. Insulation: Cross-linked polyethylene (XLPE), Max operating temperature: 90°C.

3. Unit: Cabling circularly insulated solid conductor in case of more 2 cores

4. Outer sheath: Black low-toxic and flame retardant polyefin

 

Colors

2 cores: White, Black
3 cores: White, Black, Red
4 cores: White, Black, Red, Green 
more 5 cores: Numbering on black or red colored core. The other are white.

 

Certification

KETI, Korea Eco-label

0.6/1kV NFR-3 design

 ##image:56243##

Conductor

Insulation

Filler

Binder tape

Outer sheath

 

The values of insulation resistance is not defined but only constant number of insulation resistance is defined. (K=min. 36.7MΩ.km at room temperature, min. 0.037MΩ.km at 90°C)

Characteristics

Characteristics

Construction characteristics

Construction characteristics

Conductor material
Annealed copper
Type of conductor
Stranded, class 2
Insulation
XLPE
Outer sheath
LSZH
Colour
all cores are black with white numbering
Construction type
7 x 0.67
With Green/Yellow core
No
With smaller neutral conductor
No

Dimensional characteristics

Dimensional characteristics

Number of cores
7
Conductor cross-section
2.5 mm²
Average insulation thickness
0.7 mm
Average sheath thickness
1.8 mm
Outer Diameter
16 mm
Approximate weight
400 kg/km
Conductor diameter
2.01 mm
Neutral conductor section (when smaller)
- mm²

Electrical characteristics

Electrical characteristics

Max. DC resistance of the conductor at 20°C
7.41 Ohm/km
Test voltage
3500 V
Rated Voltage Uo/U (Um)
0,6/1 kV

Mechanical characteristics

Mechanical characteristics

Corrosivity
IEC 60754-2

Usage characteristics

Usage characteristics

Operating temperature, range
-15 ... 90 °C
Flame retardant
KSC IEC 60332-3
Smoke density
ASTME 662
Bending factor when installed
12 (xD)

Resources

Resources

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