BS7211 Cables  
2491B/6701B Single Core Cable

BS 7211 Cables

6491B Conduit Wiring Cable

Application and Description

BS 7211 Cables

6491B is equivalent to harmonized code H07Z-R, these 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

Strands to IEC 60228 Cl-2 LSOH thermosetting insulation

-Thermosetting core insulation type EI5

-LSOH - low smoke, zero halogen

BS 7211 Cables

Insulation Colour

Black, Blue, Green/Yellow, Red, Yellow, White, Violet, Brown, Grey, Orange, Pink

Technical Characteristics

Working voltage: 450/750v

Test voltage: 2500 volts

Minimum bending radius: up to 10 mm² - 3 x overall diameter,above 25 mm² -6 x overall diameter

Flexing temperature: +0º C to +90º C

Short circuit temperature: +250º C

Insulation resistance: 10 MΩ x km

Flame retardant: IEC 60332.1

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 Overall Diameter Nominal CopperWeight Nominal Weight Minimum Insulation resistance at 90 °C
  # x mm² mm mm kg/km kg/km MΩ·km
16(7/24) 1 x 1.5 0.7 2.7-3.4 14.4 21 0.010
14(7/22) 1 x 2.5 0.8 3.3-4.1 24 33 0.009
12(7/20) 1 x 4 0.8 3.8-4.7 39 49 0.0077
10(7/18) 1 x 6 0.8 4.3-5.4 58 71 0.0065
8(7/16) 1 x 10 1 5.6-7.0 94 114 0.0065
6(7/14) 1 x 16 1 6.4-8.0 154 172 0.0050
4(7/12) 1 x 25 1.2 8.1-10.1 240 265 0.0050
2(7/10) 1 x 35 1.2 9.0-11.3 350 397 0.0043
1(19/13) 1 x 50 1.4 10.6-13.2 480 534 0.0043
2/0(19/11) 1 x 70 1.4 12.1-15.1 672 830 0.0035
3/0(19/10) 1 x 95 1.6 14.1-17.6 912 1054 0.0035
4/0(37/12) 1 x 120 1.6 15.6-19.4 1152 1274 0.0032
300MCM(37/11) 1 x 150 1.8 17.3-21.6 1440 1604 0.0032
350MCM(37/10) 1 x 185 2.0 19.3-24.1 1776 2030 0.0032
500MCM(61/11) 1 x 240 2.2 22.0-27.5 2400 2630 0.0032
-(61/10) 1 x 300 2.4 24.5-30.6 3010 3330 0.0030
-(61/9) 1 x 400 2.6 27.5-34.3 3820 4190 0.0028
-(61/8) 1 x 500 2.8 30.5-38.2 4800 5240 0.0028
-(127/10) 1 x 630 2.8 34.0-42.5 6350 6820 0.0025