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
| 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
| 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 |
