6491B to BS 7211

Application and Description

These cables are designed for fixed wiring purposes in domestic and industrial power/lighting applications. They can be used in trunking or conduit, or may be surface mounted when used for earthing. and they are 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 and which is particularly important where electronic equipment is installed. 6491B is equivalent to harmonized code H05Z-U/H07Z-U/H07Z-R.

Cable Construction

6491B to BS 7211 6491B to BS 7211 - British Standard Industrial Cables
Bare copper made of solid/strands conductor
Solid to BS 6360 Class 1 or IEC 60228 Class 1(H05Z-U/H07Z-U)
Stranding to BS 6360 Class 2 or IEC 60228 Class 2(H07Z-R)
LSOH thermosetting core insulation type EI5

Core Identification

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

Technical Characteristics

6491B to BS 7211 6491B to BS 7211 - British Standard Industrial Cables
Working voltage 300/500 volts(H05Z-R), 450/750 volts(H07Z-U/H07Z-R)
Test voltage 2000 volts(H05Z-R), 2500 volts(H07Z-U/H07Z-R)
Minimum bending radius up to 10 mm^2 - 3xoverall diameter
  above 25 mm^2 - 6xoverall diameter
Operating temperature +0 oC to +90 oC
Short circuit temperature +250 oC
Insulation resistance 10 MΩxkm
  Halogen free acc. to EN 50267-2-1 / IEC 60754-1
  Smoke density acc. to EN 50268-2 / IEC 61034-2
  Corrosivity of gases acc. to EN 50267-2-2, IEC 60754-2
  Flame retardancy acc. to EN 50265-2-1, IEC 60332-1

Cable Parameter

AWG (No of Strands/Strand Diameter) No. of Cores x Nominal Cross Sectional Area Nominal Thickness of Insulation Nominal Overall Diameter Nominal Copper Weight Nominal Weight
#xmm^2 mm mm kg/km kg/km
H05Z-U
20 1x0.5 0.6 2.0 4.8 8
18 1x0.75 0.6 2.2 7.2 12
17 1x1 0.6 2.3 9.6 14
H07Z-U
16 1x1.5 0,7 2.8 14.4 20
14 1x2.5 0,8 3.3 24 30
12 1x4 0,8 3.8 38 45
10 1x6 0,8 4.3 58 65
8 1x10 1,0 5.5 96 105
H07Z-R
16(7/24) 1x1.5 0.7 3.0 14.4 21
14(7/22) 1x2.5 0.8 3.6 24 33
12(7/20) 1x4 0.8 4.1 39 49
10(7/18) 1x6 0.8 4.7 58 71
8(7/16) 1x10 1 6 96 114
6(7/14) 1x16 1 6.8 154 172
4(7/12) 1x25 1.2 8.4 240 265
2(7/10) 1x35 1.2 9.3 336 360
1(19/13) 1x50 1.4 10.9 480 487
2/0(19/11) 1x70 1.4 12.6 672 683
3/0(19/10) 1x95 1.6 14.7 912 946
4/0(37/12) 1x120 1.6 16 1152 1174
300MCM(37/11) 1x150 1.8 17.9 1440 1448
350MCM(37/10) 1x185 2.0 20.0 1776 1820
500MCM(61/11) 1x240 2.2 22.7 2304 2371
-(61/10) 1x300 2.4 25.4 2980 3050
-(61/9) 1x400 2.6 28.8 3765 3842
-(61/8) 1x500 2.8 32.8 4725 4900
-(127/10) 1x630 2.8 36.5 6205 6334
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