Fire Resistant Power Cable BS6387
Fire performance cables maintain circuit integrity in a fire and so are suitable for fire detection, alarm and emergency lighting systems.
- Fire Alarms
- Fire Detection
- Hospitals
- Large Buildings
- Railway Stations
- Schools
- Shopping Centres
- Sprinkler Pumps
Fire Standards
Cables for power and control building services that are required to operate in the event of fire. Unless protected by other means, armoured cables are to be preferred for such applications. Cables should meet the fire resistance requirement of BS 6387 Category CWZ and low fire hazard requirements of BS EN 60332-1-2, BS EN 60332-3-24, BS EN 61034-2. They should produce less than 0.5% acidic gases when tested in accordance with BS EN 60754-1.
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
BS6387, Categories C, W & Z, Specification for performance requirements for cables required to maintain circuit integrity under fire conditions
IEC60331: Tests for electric cables under fire conditions – circuit integrity
BS EN 61034:2005: Measurement of smoke density of cables burned under defined conditions. Test procedure and requirements
BS6724: Electric cables. Thermosetting insulated, armoured cables for voltages of 600/1000V and 1900/3300V, having low emission of smoke and corrosive gases when affected by fire BS7846: Electric cables. 600/1000 V armoured fire-resistant cables having thermosetting insulation and low emission of smoke and corrosive gases when affected by fire
BS EN 50266:2001: Common test methods for cables under fire conditions. Test for vertical flame spread of vertically-mounted bunched wires or cables
Fire Resistance BS6387 Categories C, W & Z:
IEC60331: 750 deg C for 3 hours
Flame Propagation BS EN 50266 parts 1 and 3, IEC 60332-3, BS EN 60332:2004
Smoke Emission IEC 61034, BS EN 61034:2005
Corrosive Acid Gas BS EN 50267-2-1:1999, IEC 60754-1
Cable configuration
| No of cores | Size sq.mm | Insulation thickness [mm] | Diameter of armour wire [mm] | Approx. diameter under armour | Overall diameter | Weight [kg/km] | Max conductor resistance at 20°C [ohms/km] | Current DC or single phase AC clipped direct [amps] | Current rating DC or single phase AC free air amps | Volt drop DC mV/A/m | Volt drop single phase AC [mV/A/m] |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 1.5 | 0.6 | 0.9 | 10.4 | 14.8 | 420 | 12.1 | 27 | 29 | 31 | 31 |
| 2 | 2.5 | 0.7 | 0.9 | 11.5 | 13.8 | 500 | 7.41 | 36 | 39 | 19 | 19 |
| 2 | 4 | 0.7 | 0.9 | 12.6 | 17.2 | 580 | 4.61 | 49 | 52 | 12 | 12 |
| 2 | 6 | 0.7 | 0.9 | 13.8 | 18.4 | 660 | 3.08 | 62 | 66 | 7.9 | 7.9 |
| 2 | 10 | 0.7 | 0.9 | 15.7 | 20.5 | 830 | 1.83 | 85 | 90 | 4.7 | 4.7 |
| 2 | 16 | 0.7 | 1.25 | 16.1 | 21.6 | 1000 | 1.15 | 110 | 115 | 2.9 | 2.9 |
| 2 | 25 | 0.9 | 1.6 | 16.3 | 22.0 | 1100 | 0.727 | 146 | 152 | 1.85 | 1.9 |
| 2 | 35 | 0.9 | 1.6 | 18.4 | 25 | 1550 | 0.524 | 180 | 188 | 1.35 | 1.35 |
| 2 | 50 | 1.0 | 1.6 | 20.6 | 27.4 | 1850 | 0.387 | 219 | 228 | 0.98 | 1.0 |
| 2 | 70 | 1.1 | 1.6 | 23.6 | 30.6 | 2450 | 0.268 | 279 | 291 | 0.67 | 0.69 |
| 2 | 95 | 1.1 | 2.0 | 26.7 | 34.7 | 3350 | 0.193 | 338 | 354 | 0.49 | 0.52 |
| 2 | 120 | 1.2 | 2.0 | 29.5 | 37.7 | 3900 | 0.153 | 392 | 410 | 0.39 | 0.42 |
| 2 | 150 | 1.4 | 2.5 | 32.5 | 40.9 | 4650 | 0.124 | 451 | 472 | 0.31 | 0.35 |
| 2 | 185 | 1.6 | 2.5 | 36.5 | 36.5 | 5950 | 0.0991 | 515 | 539 | 0.25 | 0.29 |
| 2 | 240 | 1.7 | 2.5 | 40.6 | 50.6 | 7350 | 0.0754 | 607 | 636 | 0.195 | 0.24 |
| 2 | 300 | 1.8 | 2.5 | 44.9 | 55.1 | 8700 | 0.0601 | 698 | 732 | 0.155 | 0.21 |
| 2 | 400 | 2.0 | 2.5 | 50.0 | 60.6 | 10750 | 0.0470 | 787 | 847 | 0.120 | 0.19 |
| 3 | 1.5 | 0.6 | 0.9 | 10.9 | 15.5 | 426 | 12.1 | 0.20 | 23 | 25 | 27 |
| 3 | 2.5 | 0.7 | 0.9 | 12.2 | 16.8 | 540 | 7.41 | 0.35 | 31 | 33 | 16 |
| 3 | 4 | 0.7 | 0.9 | 13.4 | 18 | 640 | 4.61 | 0.57 | 42 | 44 | 10 |
| 3 | 6 | 0.7 | 0.9 | 14.7 | 19.3 | 740 | 3.08 | 0.86 | 53 | 56 | 6.8 |
| 3 | 10 | 0.7 | 1.25 | 16.7 | 22.2 | 1080 | 1.83 | 1.4 | 73 | 78 | 4.0 |
| 3 | 16 | 0.7 | 1.25 | 17.2 | 22.9 | 1310 | 1.15 | 2.2 | 94 | 99 | 2.5 |
| 3 | 25 | 0.9 | 1.6 | 20.6 | 27.2 | 1800 | 0.727 | 3.6 | 124 | 131 | 1.65 |
| 3 | 35 | 0.9 | 1.6 | 22.9 | 29.7 | 2200 | 0.524 | 5.0 | 154 | 162 | 1.15 |
| 3 | 50 | 1.0 | 1.6 | 23.4 | 30.2 | 2450 | 0.387 | 7.1 | 187 | 197 | 0.87 |
| 3 | 70 | 1.1 | 2.0 | 26.9 | 33.9 | 3200 | 0.268 | 10.0 | 238 | 251 | 0.60 |
| 3 | 95 | 1.1 | 2.0 | 30.5 | 38.7 | 4450 | 0.193 | 13.6 | 289 | 304 | 0.45 |
| 3 | 120 | 1.2 | 2.0 | 33.7 | 42.1 | 5300 | 0.153 | 17.2 | 335 | 353 | 0.37 |
| 3 | 150 | 1.4 | 2.5 | 37.6 | 47.2 | 6700 | 0.124 | 21.4 | 386 | 406 | 0.30 |
| 3 | 185 | 1.6 | 2.5 | 41.7 | 51.5 | 8080 | 0.0991 | 26.5 | 441 | 463 | 0.26 |
| 3 | 240 | 1.7 | 2.5 | 46.6 | 56.8 | 9950 | 0.0754 | 34.3 | 520 | 546 | 0.21 |
| 3 | 300 | 1.8 | 2.5 | 51.5 | 61.9 | 12050 | 0.0601 | 42.9 | 599 | 628 | 0.185 |
| 3 | 400 | 2.0 | 2.5 | 57.7 | 68.3 | 14800 | 0.0470 | 57.2 | 673 | 728 | 0.165 |
| 4 | 1.5 | 0.6 | 0.9 | 11.9 | 16.5 | 520 | 12.1 | 0.20 | 23 | 25 | 27 |
| 4 | 2.5 | 0.7 | 0.9 | 13.4 | 18.0 | 620 | 7.41 | 0.35 | 31 | 33 | 16 |
| 4 | 4 | 0.7 | 0.9 | 14.8 | 19.4 | 730 | 4.61 | 0.57 | 42 | 44 | 10 |
| 4 | 6 | 0.7 | 0.9 | 16.2 | 21.7 | 990 | 3.08 | 0.86 | 53 | 56 | 6.8 |
| 4 | 10 | 0.7 | 1.25 | 18.6 | 24.1 | 1260 | 1.83 | 1.4 | 73 | 78 | 4.0 |
| 4 | 16 | 0.7 | 1.25 | 19.1 | 24.8 | 1640 | 1.15 | 2.2 | 94 | 99 | 2.5 |
| 4 | 25 | 0.9 | 1.6 | 22.9 | 29.5 | 2150 | 0.727 | 3.6 | 124 | 131 | 1.65 |
| 4 | 35 | 0.9 | 1.6 | 25.5 | 32.3 | 2650 | 0.524 | 5.0 | 154 | 162 | 1.15 |
| 4 | 50 | 1.0 | 1.6 | 26.9 | 33.9 | 3100 | 0.387 | 7.1 | 187 | 197 | 0.87 |
| 4 | 70 | 1.1 | 2.0 | 31.4 | 39.6 | 4400 | 0.268 | 10.0 | 238 | 251 | 0.60 |
| 4 | 95 | 1.1 | 2.0 | 35.2 | 43.6 | 5650 | 0.193 | 13.6 | 289 | 304 | 0.45 |
| 4 | 120 | 1.2 | 2.5 | 39.4 | 49.0 | 7250 | 0.153 | 17.2 | 335 | 353 | 0.37 |
| 4 | 150 | 1.4 | 2.5 | 43.5 | 53.3 | 8550 | 0.124 | 21.4 | 386 | 406 | 0.30 |
| 4 | 185 | 1.6 | 2.5 | 48.3 | 85.8 | 10300 | 0.0991 | 26.5 | 441 | 463 | 0.26 |
| 4 | 240 | 1.7 | 2.5 | 54.5 | 64.9 | 12900 | 0.0754 | 34.3 | 520 | 546 | 0.21 |
| 4 | 300 | 1.8 | 2.5 | 59.9 | 70.7 | 15550 | 0.0601 | 42.9 | 599 | 628 | 0.185 |
| 4 | 400 | 2.0 | 3.15 | 67.3 | 80.0 | 20250 | 0.0470 | 57.2 | 673 | 728 | 0.165 |
| 5 | 1.5 | 0.6 | 0.9 | - | 11.0 | 240 | 12.10 | 38 | 31 | 31 | 31 |
| 5 | 2.5 | 0.7 | 0.9 | - | 12.0 | 300 | 7.41 | 49 | 41 | 19 | 19 |
| 5 | 4 | 0.7 | 0.9 | - | 13.0 | 360 | 4.61 | 65 | 55 | 12 | 12 |
| 5 | 6 | 0.7 | 0.9 | - | 14.0 | 440 | 3.08 | 81 | 70 | 7.90 | 7.90 |
| 5 | 10 | 0.7 | 0.9 | - | 16.0 | 580 | 1.83 | 109 | 95 | 4.70 | 4.70 |
| 5 | 16 | 0.7 | 0.9 | - | 19.0 | 860 | 1.15 | 141 | 126 | 2.90 | 2.90 |
| 5 | 25 | 0.9 | 1.25 | - | 22.0 | 1050 | 0.727 | 183 | 164 | 1.85 | 1.90 |
| 5 | 35 | 0.9 | 1.6 | - | 26.0 | 1450 | 0.524 | 219 | 202 | 1.35 | 1.35 |
| 5 | 50 | 1.0 | 1.6 | - | 25.0 | 1700 | 0.387 | 259 | 244 | 0.98 | 1.00 |
| 5 | 70 | 1.1 | 1.6 | - | 28.0 | 2250 | 0.268 | 317 | 306 | 0.67 | 0.69 |
| 5 | 95 | 1.1 | 2.0 | - | 32.0 | 3050 | 0.193 | 381 | 378 | 0.49 | 0.52 |
| 5 | 120 | 1.2 | 2.0 | - | 35.0 | 3650 | 0.153 | 433 | 437 | 0.39 | 0.42 |
| 5 | 150 | 1.4 | 2.0 | - | 39.0 | 4350 | 0.124 | 485 | 499 | 0.31 | 0.35 |
| 5 | 185 | 1.6 | 2.5 | - | 44.0 | 5650 | 0.0991 | 547 | 576 | 0.25 | 0.29 |
| 5 | 240 | 1.7 | 2.5 | - | 47.0 | 6950 | 0.0754 | 632 | 680 | 0.195 | 0.24 |
| 5 | 300 | 1.8 | 2.5 | - | 52.0 | 8350 | 0.0601 | 708 | 775 | 0.155 | 0.21 |
| 5 | 400 | 2.0 | 2.5 | - | 58.0 | 11030 | 0.0470 | 799 | 892 | 0.120 | 0.190 |
| 7 | 1.5 | 0.6 | 0.9 | - | 16.2 | 520 | 12.1 | 27 | 29 | 31 | 31 |
| 7 | 2.5 | 0.7 | 0.9 | - | 18.0 | 650 | 7.41 | 36 | 39 | 19 | 19 |
| 12 | 1.5 | 0.6 | 0.9 | - | 20.9 | 860 | 12.1 | 27 | 29 | 31 | 31 |
| 12 | 2.5 | 0.7 | 0.9 | - | 24.4 | 1130 | 7.41 | 36 | 39 | 19 | 19 |
| 19 | 1.5 | 0.6 | 0.9 | - | 24.1 | 1130 | 12.1 | 27 | 29 | 31 | 31 |
| 19 | 2.5 | 0.7 | 0.9 | - | 29.2 | 1710 | 7.41 | 36 | 39 | 19 | 19 |
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