BS 7211 Cables
6241B/6242B/ 6243B, LSOH Flat Wiring Cables with circuit protective conductor
Application and Description
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
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
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 |
