BS7211 Cables  
2491B/6701B Single Core Cable

BS 7211 Cables

6241B/6242B/ 6243B, LSOH Flat Wiring Cables with circuit protective conductor

Application and Description

BS 7211 Cables

These cables are suitable for fixed installation particularly for situations in which low emission smoke and

domestic wiring cable for the surface wiring of sockets and lighting where fire, smoke emission and toxic fumes

create a potential threat to life and equipment. Can be installed in fixed installations in dry or damp premises on

walls, boards or trays, in channels or embedded in plaster. Suitable for laying in conduit or trunking where

mechanical protection is required

Cable Construction

Fine bare copper strands

Strands to IEC 60228 Cl-1 or 2

Thermosetting core insulation type EI5 or GP 8

The core or cores shall be laid parallel with the uninsulated circuit protective conductor

For twin cores, the protective conductor centrally placed between cores in same plane

For 3 cores, the protective conductor centrally placed between black and grey cores in same plane

LSOH sheath, type LTS 2

BS 7211 Cables

Insulation Colour

Single core: brown or blue Twin: brown and blue, or, for 2 × 1.0 and 2 × 1.5 cables, brown and brown 3-core: brown, black (centre core) and grey

Technical Characteristics

Working voltage: 300/500v

Test voltage: 2000 volts

Flexing bending radius: 15 x Ø

Static bending radius: 10 x Ø

Flexing temperature: +5º 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

BS 7211 Cables

Cable Parameter

AWG No. of Cores x Nominal Cross Sectional Area Nominal thickness of insulation Nominal thickness of sheath Nominal overall dimensions Circuit protectiveconductor AWG Nominal Weight Minimum insulation resistance at 90 °C
lower limit upperlimit
# x mm² mm mm mm mm kg/km MΩ·km
6242B
17 2 × 1.0 0.7 0.9 4.1 × 7.6 5.0 × 9.1 17 68 0.011
17(7/26) 2 × 1.0 0.7 0.9 4.2 × 7.8 5.1 × 9.4 17 73 0.011
16 2 × 1.5 0.7 0.9 4.4 × 8.1 5.3 × 9.7 17 85 0.011
16(7/24) 2 × 1.5 0.7 0.9 4.5 × 8.3 5.4 × 10.0 17 90 0.011
14 2 × 2.5 0.7 1.0 4.9 × 9.3 6.0 × 11.2 16 120 0.0092
14(7/22) 2 × 2.5 0.7 1.0 5.0 × 9.5 6.1 × 11.4 16 125 0.0084
12(7/20) 2 × 4 0.7 1.0 5.5 × 10.4 6.7 × 12.6 16 175 0.0070
10(7/18) 2 × 6 0.7 1.1 6.2 × 12.0 7.5 × 14.6 14 240 0.0059
8(7/16) 2 × 10 0.7 1.2 7.3 × 14.5 8.8 × 17.6 12(7/20) 390 0.0047
6(7/14) 2 × 16 0.7 1.3 8.4 × 17.0 10.1 × 20.5 10(7/18) 560 0.0039
6243B
17 3 × 1.0 0.7 0.9 4.1 × 10.0 5.1 × 12.1 17 91 0.011
16 3 × 1.5 0.7 0.9 4.4 × 10.7 5.3 × 12.9 17 115 0.011
14 3 × 2.5 0.7 1.0 4.9 × 12.0 6.0 × 14.6 17 170 0.0092
12(7/20) 3 × 4 0.7 1.0 5.5 × 14.0 6.7 × 16.9 16 196 0.0070
10(7/18) 3 × 6 0.7 1.1 6.2 × 16.2 7.5 × 19.5 14 291 0.0059
8(7/16) 3 × 10 0.7 1.2 7.3 × 19.5 8.8 × 23.6 12(7/20) 440 0.0047
6(7/14) 3 × 16 0.7 1.3 8.4 × 22.8 10.1 × 27.6 10(7/18) 670 0.0039