BS7846 – F120 (Enhanced)
Special fire resistant cables designed to survive and operate during arduous fire conditions. These are designed as per BS 7846 standard and are approved for F120 fire test as per BS 8491 standard.
Cable Uses
- Fire Alarms
- Fire Detection
- Hospitals
- Large Buildings
- Railway Stations
- Schools
- Shopping Centres
- Sprinkler Pumps
Fire Standards
As described in BS 8519, fire resistant cables are classified for Life Safety and Fire Fighting systems with different fire survival time of 30 minutes, 60 minutes or 120 minutes. These cables meet the 120 minutes fire survival test. During the F120 fire survival test as per BS 8491 the cable sample is subjected to fire and mechanical shock with direct impact on the cable as well as being subjected to high pressure water spray.
We do supply LPCB & BASEC certified cables.
For more information, please visit Fire Standards
| Conductor | Plain annealed copper stranded circular (4 - 35mm²) or shaped (50 – 400mm²)conductor complying with BS EN 60228 Class 2 |
| Insulation | Primary insulation: Mineral ceramic (Mica/Glass) fire resistant tape Secondary insulation: 90°C cross – linked insulation |
| Bedding | Thermoplastic LSZH bedding compound |
| Armour | Single layer of galvanised steel wires |
| Sheath | Robust thermoplastic LSZH sheath |
General Standards
BS 8519 – Category 1, 2 and 3
BS 7846 – F120, 120 mins fire, water jet and direct impact
Cable configuration
| No of cores | Nom cross sectional area mm2 | Approx. overall diameter [mm] | Approx. diameter under armour [mm] | Nom diameter of armour wires [mm] | Approx. cable weight [kg/km] | Max conductor resistance at 20°C [ohms/km] | Current rating DC or single phase AC clipped direct [Amps] | Current rating DC or single phase AC Free Air [Amps] | Volt drop single phase AC [mV/A/m] |
|---|---|---|---|---|---|---|---|---|---|
| 2 | 4 | 15.5 | - | 0.9 | - | - | 41 | - | - |
| 2 | 6 | 16.5 | - | 0.9 | - | - | 62 | - | - |
| 2 | 10 | 19 | - | 0.9 | - | - | 85 | - | - |
| 2 | 16 | 21.5 | - | 1.25 | - | - | 110 | - | - |
| 2 | 25 | 25 | - | 1.25 | - | - | 146 | - | - |
| 2 | 35 | 28.5 | - | 1.6 | - | - | 180 | - | - |
| 2 | 50 | 26.5 | - | 1.6 | - | - | 219 | - | - |
| 2 | 70 | 30 | - | 1.6 | - | - | 279 | - | - |
| 2 | 95 | 34 | - | 2 | - | - | 338 | - | - |
| 2 | 120 | 37 | - | 2 | - | - | 392 | - | - |
| 2 | 150 | 40 | - | 2 | - | - | 451 | - | - |
| 2 | 185 | 46 | - | 2.5 | - | - | 515 | - | - |
| 2 | 240 | 50 | - | 2.5 | - | - | 607 | - | - |
| 2 | 300 | 55 | - | 2.5 | - | - | 698 | - | - |
| 2 | 400 | 60 | - | 2.5 | - | - | 787 | - | - |
| 3 | 4 | 16.5 | - | 0.9 | - | - | 0.57 | - | - |
| 3 | 6 | 17.5 | - | 0.9 | - | - | 0.86 | - | - |
| 3 | 10 | 20.5 | - | 1.25 | - | - | 1.4 | - | - |
| 3 | 16 | 22.5 | 18.6 | 1.25 | 1300 | 1.15 | 2.2 | 99 | 2.6 |
| 3 | 25 | 27.5 | 22 | 1.6 | 1850 | 0.727 | 3.6 | 131 | 1.6 |
| 3 | 35 | 31 | 24.4 | 1.6 | 2260 | 0.524 | 5 | 162 | 1.2 |
| 3 | 50 | 30 | 25.9 | 1.6 | 2680 | 0.387 | 7.1 | 197 | 0.87 |
| 3 | 70 | 33 | 27.8 | 1.6 | 3385 | 0.268 | 10 | 251 | 0.61 |
| 3 | 95 | 38 | 31.6 | 2 | 4560 | 0.193 | 13.6 | 304 | 0.45 |
| 3 | 120 | 42 | 34.8 | 2 | 5450 | 0.153 | 17.2 | 353 | 0.36 |
| 3 | 150 | 47 | 38.8 | 2.5 | 6910 | 0.124 | 21.4 | 406 | 0.3 |
| 3 | 185 | 51 | 43.1 | 2.5 | 8285 | 0.0991 | 26.5 | 463 | 0.25 |
| 3 | 240 | 56 | 47.4 | 2.5 | 10210 | 0.0754 | 34.3 | 546 | 0.21 |
| 3 | 300 | 61 | 53.9 | 2.5 | 12390 | 0.0601 | 42.9 | 628 | 0.19 |
| 3 | 400 | 68 | 59.2 | 2.5 | 15155 | 0.047 | 57.2 | 728 | 0.17 |
| 4 | 4 | 17.5 | - | 0.9 | - | - | 0.57 | - | - |
| 4 | 6 | 20 | - | 1.25 | - | - | 0.86 | - | - |
| 4 | 10 | 22.5 | - | 1.25 | - | - | 1.4 | - | - |
| 4 | 16 | 24.5 | 19.8 | 1.25 | 1580 | 1.15 | 2.2 | 99 | 2.6 |
| 4 | 25 | 30 | 24.4 | 1.6 | 2385 | 0.727 | 3.6 | 131 | 1.6 |
| 4 | 35 | 33 | 27 | 1.6 | 2930 | 0.524 | 5 | 162 | 1.2 |
| 4 | 50 | 33 | 27.5 | 1.6 | 3230 | 0.387 | 7.1 | 197 | 0.87 |
| 4 | 70 | 39 | 31.7 | 2 | 4520 | 0.268 | 10 | 251 | 0.61 |
| 4 | 95 | 43 | 35.4 | 2 | 5700 | 0.193 | 13.6 | 304 | 0.45 |
| 4 | 120 | 48 | 39 | 2.5 | 7260 | 0.153 | 17.2 | 353 | 0.36 |
| 4 | 150 | 53 | 43.7 | 2.5 | 8610 | 0.124 | 21.4 | 406 | 0.3 |
| 4 | 185 | 58 | 48.2 | 2.5 | 10370 | 0.0991 | 26.5 | 463 | 0.25 |
| 4 | 240 | 64 | 53.5 | 2.5 | 12960 | 0.0754 | 34.3 | 546 | 0.21 |
| 4 | 300 | 70 | 59.4 | 2.5 | 15690 | 0.0601 | 42.9 | 628 | 0.19 |
| 4 | 400 | 79 | 67.8 | 3.15 | 20300 | 0.047 | 57.2 | 728 | 0.1 |
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