Single Core Non-sheathed Cables 6491B (H07Z-U,HO7Z-R,H07Z-K)
Thermoseting Halogen-free Crosslinked Insulated and Low Emission of Smoke, 450/750V, 90C
Application
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 H07Z-U/ H07Z-R/H07Z-K.
Standard
EN 50525-3-41, BS 7211:1998, IEC 60754-2, EN 50267
Construction
Conductor: Annealed solid or stranded copper wire
Solid to BS 6360 Class 1 or IEC 60228 Class 1 (H07Z-U)
Stranding to BS 6360 Class 2 or IEC 60228 Class 2 (H07Z-R)
Stranding to BS 6360 Class 5 or IEC 60228 Class 5 (H07Z-K)
Insulation:Thermosetting LSOH cross-link polyolefin,type EI 5
Technical Characteristics
Rated voltage: 450/750V
Test voltage: 2500V
Operating temperature: -5º C to + 90º C
Flame retardant: IEC 60332.1
Technical Parameter
| Nominal Cross Sectional Area | No. of wires | Wire Dia. | Nom. PVC Insulation Thickness | Overall Diameter | Min. Insulation Resistance at 90C | Maximum Resistance of Conductor at 20ºC | |
| Min. OD | Max. OD | Plain Copper Wires | |||||
| mm² | mm | mm | mm | mm | Mohm.km | Ω/km | |
| 6491B (Harmonized cable code: H07Z-U) | |||||||
| 1.5 | 1 | 1.38 | 0.7 | 2.6 | 3.3 | 0.011 | 12.1 |
| 2.5 | 1 | 1.78 | 0.8 | 3.2 | 4.0 | 0.010 | 7.41 |
| 4 | 1 | 2.25 | 0.8 | 3.6 | 4.6 | 0.0085 | 4.61 |
| 6 | 1 | 2.76 | 0.8 | 4.1 | 5.2 | 0.007 | 3.08 |
| 10 | 1 | 3.57 | 1.0 | 5.3 | 6.6 | 0.007 | 1.83 |
| 6491B (Harmonized cable code:H07Z-R) | |||||||
| 1.5 | 7 | 0.52 | 0.7 | 2.7 | 3.4 | 0.010 | 12.1 |
| 2.5 | 7 | 0.67 | 0.8 | 3.3 | 4.1 | 0.009 | 7.41 |
| 4 | 7 | 0.85 | 0.8 | 3.8 | 4.7 | 0.0077 | 4.61 |
| 6 | 7 | 1.05 | 0.8 | 4.3 | 5.4 | 0.0065 | 3.08 |
| 10 | 7 | 1.35 | 1.0 | 5.6 | 7.0 | 0.0065 | 1.83 |
| 16 | 7 | 1.70 | 1.0 | 6.4 | 8.0 | 0.0050 | 1.15 |
| 25 | 7 | 2.13 | 1.2 | 8.1 | 10.1 | 0.0050 | 0.727 |
| 35 | 7 | 2.52 | 1.2 | 9.0 | 11.3 | 0.0043 | 0.524 |
| 50 | 19 | 1.83 | 1.4 | 10.6 | 13.2 | 0.0043 | 0.387 |
| 70 | 19 | 2.17 | 1.4 | 12.1 | 15.1 | 0.0035 | 0.268 |
| 95 | 19 | 2.52 | 1.6 | 14.1 | 17.6 | 0.0035 | 0.193 |
| 120 | 37 | 2.03 | 1.6 | 15.6 | 19.4 | 0.0032 | 0.153 |
| 150 | 37 | 2.27 | 1.8 | 17.3 | 21.6 | 0.0032 | 0.124 |
| 185 | 37 | 2.52 | 2.0 | 19.3 | 24.1 | 0.0032 | 0.0991 |
| 240 | 61 | 2.24 | 2.2 | 22.0 | 27.5 | 0.0032 | 0.0754 |
| 300 | 61 | 2.50 | 2.4 | 24.5 | 30.6 | 0.0030 | 0.0601 |
| 400 | 61 | 2.89 | 2.6 | 27.5 | 34.3 | 0.0028 | 0.0470 |
| 500 | 61 | 3.23 | 2.8 | 30.5 | 38.2 | 0.0028 | 0.0366 |
| 630 | 91 | 2.97 | 2.8 | 34.0 | 42.5 | 0.0025 | 0.0283 |
| 6491B (Harmonized cable code:H07Z-K) | |||||||
| 1.5 | 30 | 0.25 | 0.7 | 2.8 | 3.5 | 0.010 | 13.3 |
| 2.5 | 50 | 0.25 | 0.8 | 3.4 | 4.3 | 0.009 | 7.98 |
| 4 | 56 | 0.3 | 0.8 | 3.9 | 4.9 | 0.007 | 4.95 |
| 6 | 84 | 0.3 | 0.8 | 4.4 | 5.5 | 0.006 | 3.30 |
| 10 | 80 | 0.4 | 1.0 | 5.7 | 7.1 | 0.0056 | 1.91 |
| 16 | 128 | 0.4 | 1.0 | 6.7 | 8.4 | 0.0046 | 1.21 |
| 25 | 200 | 0.4 | 1.2 | 8.4 | 10.6 | 0.0044 | 0.780 |
| 35 | 280 | 0.4 | 1.2 | 9.7 | 12.1 | 0.0038 | 0.554 |
| 50 | 400 | 0.4 | 1.4 | 11.5 | 14.4 | 0.0037 | 0.386 |
| 70 | 356 | 0.5 | 1.4 | 13.2 | 16.6 | 0.0032 | 0.272 |
| 95 | 485 | 0.5 | 1.6 | 15.1 | 18.8 | 0.0032 | 0.206 |
| 120 | 614 | 0.5 | 1.6 | 16.7 | 20.9 | 0.0029 | 0.161 |
| 150 | 765 | 0.5 | 1.8 | 18.6 | 23.3 | 0.0029 | 0.129 |
| 185 | 944 | 0.5 | 2.0 | 20.6 | 25.8 | 0.0029 | 0.106 |
| 240 | 1225 | 0.5 | 2.2 | 23.5 | 29.4 | 0.0028 | 0.0801 |
