BS7211 Cables  
2491B/6701B Single Core Cable

BS 7211 Cables

Thermosetting insulated, single-core, sheathed cables

Application and Description

BS 7211 Cables

BS 7211 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

BS 7211 Cables

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

BS 7211 Cables

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