Draka Saffire BS6724 SWA Armoured Zero Halogen Low Smoke Cables
Low Smoke Zero Halogen Cables
Draka Saffire BS6724
Prysmian Draka Saffire BS6724 SWA is a zero halogen, low smoke armoured power cable for industrial wiring and mains distribution where thick black smoke and acid emission would pose a major hazard during a fire.
Saffire BS6724 SWA cables are LU approved and are designed for use in public areas and can be installed within cable ducts, clipped directly to a surface, on trays, in baskets or free air. Additionally, the cables can be laid direct in ground in free draining soil and embedded in concrete.
âž¡ See also 6242BÂ | 6491B | Railsure LU CablesÂ
Draka Saffire BS6724
Technical data
The following table provides a brief overview of the cable construction dimensions for the BS6724 type cable manufactured by Draka as part of the Saffire range of low smoke zero halogen cables – for fire resistant cables consult the Draka Firetuf range.
 | Cable Construction |
Conductors | Stranded plain annealed copper wire (Class 2) to BS EN 60228 |
Insulation | XLPE |
Binder | Polyester tape |
Bedding | Zero halogen, low smoke (0HLS) |
Armour | Galvanised steel wire armour (aluminium wire armour for single core) |
Sheath | Zero halogen, low smoke (0HLS) |
Core Colours | Single Core: Brown or blue Two Core: Brown and blue Three Core: Brown, black and grey Four Core: Brown, black, grey and blue Five Core: Brown, black, grey, blue and green/yellow |
Sheath Colour | Black |
 | Physical Characteristics |
Voltage Rating (Uo/U) | 600/1000V |
Maximum Conductor Temperature | 90ºC Note: Where a conductor operates at a temperature exceeding 70ºC it shall be ascertained that the equipment connected to the conductor is suitable for the conductor operating temperature (see regulation 512-1-5 of BS7671, the 17th Edition of IEE Wiring Regulations) |
Minimum Bending Radius | 6D circular conductors 8D shaped conductors |
Current Rating | Refers to tables 4E4A & 4E4B in BS7671 or ERA 69-30 Part V |
 | Performance Characteristics |
Smoke Emission | BS EN 61034-2 |
Acid Gas Emission | BS EN 50267-2-1 |
Flame Propagation | BS EN 60332-3-24 |
Single Core 694AWLSH cables
Low Smoke Zero Halogen
Nominal Area of Conductor (sqmm) | Armour Wire Diameter (mm) | Approx Diameter Under Armour (mm) | Approx Overall Diameter (mm) | Approx Cable Weight (kg/km) | Maximum Conductor Resistance | Nominal Area of Armour (sqmm) | Maximum Armour Resistance at 20ºC (Ω/km) | |
DC at 20ºC (Ω/km) | AC at 90ºC (Ω/km) | |||||||
120* | 1.25 | 17.7 | 24.2 | 1540 | 0.1530 | 0.1962 | 52 | 0.61 |
150* | 1.6 | 19.5 | 26.2 | 1840 | 0.1240 | 0.1594 | 76 | 0.42 |
185* | 1.6 | 21.6 | 28.4 | 2230 | 0.0991 | 0.1280 | 84 | 0.38 |
240* | 1.6 | 23.8 | 30.6 | 2800 | 0.0754 | 0.0985 | 94 | 0.34 |
300* | 1.6 | 26.4 | 33.4 | 3435 | 0.0601 | 0.0797 | 104 | 0.31 |
400* | 2.0 | 30.1 | 38.1 | 4385 | 0.0470 | 0.0635 | 147 | 0.22 |
500* | 2.0 | 33.9 | 42.1 | 5535 | 0.0366 | 0.0513 | 163 | 0.20 |
630* | 2.0 | 38.2 | 46.6 | 6990 | 0.0283 | 0.0419 | 182 | 0.18 |
800* | 2.5 | 43.4 | 53.2 | 9170 | 0.0221 | 0.0349 | 260 | 0.13 |
1000* | 2.5 | 48.3 | 58.2 | 11355 | 0.0176 | 0.0303 | 284 | 0.12 |
*Circular conductor
Two Core 6942LSH cables
Low Smoke Zero Halogen
Nominal Area of Conductor (sqmm) | Armour Wire Diameter (mm) | Approx Diameter Under Armour (mm) | Approx Overall Diameter (mm) | Approx Cable Weight (kg/km) | Maximum Conductor Resistance | Nominal Area of Armour (sqmm) | Maximum Armour Resistance at 20ºC (Ω/km) | |
DC at 20ºC (Ω/km) | AC at 90ºC (Ω/km) | |||||||
1.5* | 0.9 | 6.9 | 10.8 | 240 | 12.1 | 15.428 | 15 | 10.2 |
2.5* | 0.9 | 8.2 | 12.2 | 305 | 7.41 | 9.448 | 17 | 8.8 |
4* | 0.9 | 9.3 | 13.3 | 370 | 4.61 | 5.878 | 19 | 7.9 |
6* | 0.9 | 10.4 | 14.4 | 445 | 3.08 | 3.927 | 22 | 7 |
10* | 0.9 | 12.0 | 16.2 | 580 | 1.83 | 2.333 | 26 | 6 |
16* | 1.25 | 14.1 | 19.0 | 870 | 1.15 | 1.466 | 42 | 3.7 |
25 | 1.25 | 15.1 | 20.7 | 1090 | 0.727 | 0.926 | 42 | 3.7 |
35 | 1.6 | 16.7 | 23.2 | 1470 | 0.524 | 0.6685 | 60 | 2.6 |
50 | 1.6 | 19.2 | 25.9 | 1845 | 0.387 | 0.494 | 68 | 2.3 |
70 | 1.6 | 22.2 | 29.0 | 2385 | 0.268 | 0.3412 | 80 | 2 |
95 | 2.0 | 23.8 | 31.3 | 3025 | 0.193 | 0.2471 | 113 | 1.4 |
120 | 2.0 | 27.2 | 34.8 | 3675 | 0.153 | 0.1964 | 125 | 1.3 |
150 | 2.0 | 29.7 | 37.5 | 4330 | 0.124 | 0.1597 | 138 | 1.2 |
185 | 2.5 | 33.1 | 42.3 | 5635 | 0.0991 | 0.1284 | 191 | 0.82 |
240 | 2.5 | 37.8 | 47.2 | 7000 | 0.0754 | 0.0989 | 215 | 0.73 |
300 | 2.5 | 42.1 | 51.7 | 8480 | 0.0601 | 0.0801 | 235 | 0.67 |
400 | 2.5 | 46.9 | 56.8 | 10390 | 0.047 | 0.0641 | 265 | 0.59 |
*Circular conductor, all others are shaped conductors
Three Core 6943LSH cables
Low Smoke Zero Halogen
Nominal Area of Conductor (sqmm) | Armour Wire Diameter (mm) | Approx Diameter Under Armour (mm) | Approx Overall Diameter (mm) | Approx Cable Weight (kg/km) | Maximum Conductor Resistance | Nominal Area of Armour (sqmm) | Maximum Armour Resistance at 20ºC (Ω/km) | |
DC at 20ºC (Ω/km) | AC at 90ºC (Ω/km) | |||||||
1.5* | 0.9 | 7.4 | 11.2 | 265 | 12.1 | 15.428 | 16 | 9.5 |
2.5* | 0.9 | 8.7 | 12.7 | 340 | 7.41 | 9.448 | 19 | 8.2 |
4* | 0.9 | 9.9 | 13.9 | 420 | 4.61 | 5.878 | 20 | 7.5 |
6* | 0.9 | 11.1 | 15.1 | 510 | 3.08 | 3.927 | 23 | 6.7 |
10* | 1.25 | 12.8 | 17.7 | 780 | 1.83 | 2.333 | 39 | 4 |
16* | 1.25 | 15.1 | 20.1 | 1035 | 1.15 | 1.466 | 45 | 3.5 |
25* | 1.6 | 18.9 | 25.2 | 1715 | 0.727 | 0.926 | 62 | 2.5 |
35* | 1.6 | 21.2 | 27.7 | 2120 | 0.524 | 0.6685 | 68 | 2.3 |
50 | 1.6 | 22.1 | 28.8 | 2410 | 0.387 | 0.494 | 78 | 2 |
70 | 1.6 | 25.3 | 32.1 | 3160 | 0.268 | 0.3412 | 90 | 1.8 |
95 | 2.0 | 28.3 | 36.0 | 4100 | 0.193 | 0.2471 | 128 | 1.3 |
120 | 2.0 | 31.4 | 39.3 | 4980 | 0.153 | 0.1964 | 141 | 1.2 |
150 | 2.5 | 35.3 | 44.3 | 6340 | 0.124 | 0.1597 | 201 | 0.78 |
185 | 2.5 | 39.1 | 48.3 | 7590 | 0.0991 | 0.1284 | 220 | 0.71 |
240 | 2.5 | 43.9 | 53.5 | 9575 | 0.0754 | 0.0989 | 250 | 0.63 |
300 | 2.5 | 48.7 | 58.4 | 11585 | 0.0601 | 0.0801 | 269 | 0.58 |
400 | 2.5 | 54.4 | 64.5 | 14345 | 0.047 | 0.0641 | 304 | 0.52 |
*Circular conductor, all others are shaped conductors
Four Core 6944LSH Cables
Low Smoke Zero Halogen
Nominal Area of Conductor (sqmm) | Armour Wire Diameter (mm) | Approx Diameter Under Armour (mm) | Approx Overall Diameter (mm) | Approx Cable Weight (kg/km) | Maximum Conductor Resistance | Nominal Area of Armour (sqmm) | Maximum Armour Resistance at 20ºC (Ω/km) | |
DC at 20ºC (Ω/km) | AC at 90ºC (Ω/km) | |||||||
1.5* | 0.9 | 8.4 | 11.9 | 300 | 12.1 | 15.428 | 17 | 8.8 |
2.5* | 0.9 | 9.6 | 13.6 | 385 | 7.41 | 9.448 | 20 | 7.7 |
4* | 0.9 | 10.9 | 14.9 | 480 | 4.61 | 5.878 | 22 | 6.8 |
6* | 1.25 | 12.3 | 17.2 | 690 | 3.08 | 3.927 | 36 | 4.3 |
10* | 1.25 | 14.2 | 19.0 | 920 | 1.83 | 2.333 | 42 | 3.7 |
16* | 1.25 | 16.7 | 21.8 | 1240 | 1.15 | 1.466 | 50 | 3.1 |
25* | 1.6 | 21.1 | 27.4 | 1990 | 0.727 | 0.926 | 70 | 2.3 |
35* | 1.6 | 23.6 | 30.1 | 2475 | 0.524 | 0.6685 | 78 | 2 |
50 | 1.6 | 24.3 | 31.1 | 2965 | 0.387 | 0.494 | 90 | 1.8 |
70 | 2.0 | 28.5 | 36.2 | 4040 | 0.268 | 0.3412 | 131 | 1.2 |
95 | 2.0 | 32.0 | 39.9 | 5170 | 0.193 | 0.2471 | 147 | 1.1 |
120 | 2.5 | 35.9 | 44.9 | 6675 | 0.153 | 0.1964 | 206 | 0.76 |
150 | 2.5 | 39.9 | 49.1 | 7965 | 0.124 | 0.1597 | 230 | 0.68 |
185 | 2.5 | 44.4 | 53.9 | 9655 | 0.0991 | 0.1284 | 255 | 0.61 |
240 | 2.5 | 49.7 | 59.4 | 12195 | 0.0754 | 0.0989 | 289 | 0.54 |
300 | 2.5 | 55.2 | 65.3 | 14820 | 0.0601 | 0.0801 | 319 | 0.49 |
400 | 3.15 | 62.1 | 74.0 | 19200 | 0.047 | 0.0641 | 452 | 0.35 |
*Circular conductor, all others are shaped conductors
Five Core 6945LSH cables
Low Smoke Zero Halogen
Nominal Area of Conductor (sqmm) | Armour Wire Diameter (mm) | Approx Diameter Under Armour (mm) | Approx Overall Diameter (mm) | Approx Cable Weight (kg/km) | Maximum Conductor Resistance | Nominal Area of Armour (sqmm) | Maximum Armour Resistance at 20ºC (Ω/km) | |
DC at 20ºC (Ω/km) | AC at 90ºC (Ω/km) | |||||||
1.5* | 0.9 | 8.9 | 12.9 | 345 | 12.1 | 15.428 | 19 | 8.2 |
2.5* | 0.9 | 10.6 | 14.6 | 440 | 7.41 | 9.448 | 22 | 6.8 |
4* | 0.9 | 12.0 | 16.3 | 565 | 4.61 | 5.878 | 25 | 6.2 |
6* | 1.25 | 13.6 | 18.5 | 795 | 3.08 | 3.927 | 40 | 3.9 |
10* | 1.25 | 15.6 | 20.8 | 1080 | 1.83 | 2.333 | 46 | 3.4 |
16* | 1.6 | 18.9 | 24.8 | 1610 | 1.15 | 1.466 | 72 | 2.2 |
25* | 1.6 | 22.8 | 29.2 | 2310 | 0.727 | 0.926 | 88 | 1.8 |
35* | 1.6 | 25.6 | 32.3 | 2915 | 0.524 | 0.6685 | 100 | 1.6 |
*Circular conductor, all others are shaped conductors

Low Smoke Zero Halogen Cable

London Underground LU Rail Cables, Glands & Cleats
Cable Accessories for Low Smoke Zero Halogen Cables
To maintain the circuit integrity of low smoke zero halogen (LSZH) cables, T&D distribute a complete range of Prysmian cable accessories for LSZH cables including cable glands, cable cleats, duct sealing and joints.
âž¡ See the complete range of Prysmian cable accessories for low, medium and high voltage cables – this includes MV HVÂ joints, terminations and connectors for power systems at 11kV, 33kV and 66kV.