BS7211 Cables  
2491B/6701B Single Core Cable

BS 7211 Cables

   Thermosetting insulated, single-core, sheathed cables

Application and Description

These single core cables are designed for fixed wiring purposes in domestic and industrial power/lighting applications. Can be used in trunking or conduit, or may be surface mounted when used for earthing. and generally in areas (such as public and government buildings) where smoke and toxic fumes may cause a threat to life and equipment. The cables produce no corrosive gasses when burnt which is particularly important where electronic equipment is installed.

Cable Construction

Fine bare copper strands

-Strands to IEC 60228 Cl-1 or 2

-Thermosetting core insulation type EI5 or GP 8

-Core identification: brown or blue

- LSOH sheath, type LTS 4

Technical Characteristics

Working voltage: 450/750v

Test voltage: 2500 volts

Flexing bending radius: 15 x Ø

Static bending radius: 10 x Ø

Flexing temperature: -25º C to +90º C

Short circuit temperature: +250º C

Flame retardant: IEC 60332.1

Insulation resistance: 10 MΩ x km

Smoke density acc. to EN 50268 / IEC 61034

Corrosiveness of combustion gases acc. to EN 50267-2-2, IEC 60754-2

Flame test: flame-retardant acc. to EN 50265-2-1, IEC 60332.1

Cable Parameter

AWG

No. of Cores x Nominal Cross Sectional Area

Nominal thickness of insulation

Nominal thickness of sheath

Nominal overall diameter

Nominal Weight

Minimum insulation resistance at 90 °C

 

# x mm²

mm

mm

mm

kg/km

MΩ·km

17

1 × 1.0

0.7

0.8

3.9-4.8

26

0.011

17(7/26)

1 × 1.0

0.7

0.8

4-4.9

31

0.011

16

1 × 1.5

0.7

0.8

4.2-5

34

0.011

16(7/24)

1 × 1.5

0.7

0.8

4.3-5.2

39

0.010

14

1 × 2.5

0.7

0.8

4.6-5.5

46

0.0092

14(7/22)

1 × 2.5

0.7

0.8

4.7-5.6

51

0.0084

12

1 × 4

0.7

0.8

5.0-6.0

65

0.0077

12(7/20)

1 × 4

0.7

0.9

5.3-6.4

72

0.0070

10

1 × 6

0.7

0.9

5.7-6.8

90

0.0065

10(7/18)

1 × 6

0.7

0.9

5.9-7.1

99

0.0059

8(7/16)

1 × 10

0.7

0.9

6.7-8.1

141

0.0047

6(7/14)

1 × 16

0.7

0.9

7.6-9.2

205

0.0039

4(7/12)

1 × 25

0.9

1.0

9.4-11.4

318

0.0039

2(7/10)

1 × 35

0.9

1.1

10.6-12.8

482

0.0034