BS7211 Cables  
2491B/6701B Single Core Cable

BS 7211 Cables

  2491B/6701B Single Core Cable

Application and Description

BS 7211 Cables

2491B/6701B is equivalent to harmonized code H05Z-K/H07Z-K,2491B/6701B Single Core Cables are designed for the internal wiring of switchboards and distributor boards with an alternating nominal voltage up to 1000 Volts or a direct voltage up to 750 volts. Generally install in pipes or ducts and internal wiring of appliances with maximum operating temperature of 90º C, 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-5

Thermosetting core insulation type EI5

LSOH - low smoke, zero halogen

BS 7211 Cables

Insulation Colour

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

Technical Characteristics

- Working voltage: 300/500v (2491B), 450/750v (6701B)

-Test voltage: 2000 / 2500 volts

-Minimum bending radius: 5 x Ø

-Flexing temperature: -15º C to +90º C

-Static temperature: -40º C to +90º 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
    2491B      
20(16/32) 1 x 0.5 0.6 2.1-2.6 4.8 9 0.013
18(24/32) 1 x 0.75 0.6 2.2-2.8 7.2 12.4 0.011
17(32/32) 1 x 1 0.6 2.4-2.9 9.6 15 0.010
    6701B      
16(30/30) 1 x 1.5 0.7 2.8-3.5 14.4 24 0.010
14(50/30) 1 x 2.5 0.8 3.4-4.3 24 35 0.009
12(56/28) 1 x 4 0.8 3.9-4.9 38 51 0.007
10(84/28) 1 x 6 0.8 4.4-5.5 58 71 0.006
8(80/26) 1 x 10 1.0 5.7-7.1 96 118 0.0056
6(128/26) 1 x 16 1.0 6.7-8.4 154 180 0.0046
4(200/26) 1 x 25 1.2 8.4-10.6 240 278 0.0044
2(280/26) 1 x 35 1.2 9.7-12.1 336 375 0.0038
1(400/26) 1 x 50 1.4 11.5-14.4 480 560 0.0037
2/0(356/24) 1 x 70 1.4 13.2-16.6 672 780 0.0032
3/0(485/24) 1 x 95 1.6 15.1-18.8 912 952 0.0032
4/0(614/24) 1 x 120 1.6 16.7-20.9 1152 1200 0.0029
300 MCM (765/24) 1 x 150 1.8 18.6-23.3 1440 1505 0.0029
350 MCM (944/24) 1 x 185 2.0 20.6-25.8 1776 1845 0.0029
500MCM(1225/24) 1 x 240 2.2 23.5-29.4 2304 2400 0.0028