4 BU(c) 250 V is a high-performance unarmored cable specifically designed for harsh offshore and marine environments. It features exceptional fire resistance, flame retardancy, low smoke, and halogen-free properties, and is widely used in instrumentation, communication, control, and alarm systems.
IEC 60092-376
IEC 60092-351
IEC 60092-359
IEC 60331-21
IEC 60332-1
IEC 60332-3-22
IEC 60754-1,2
IEC 61034-1,2
NEK 606:2004
Electrical Characteristics
| Conductors | Circular tinned annealed stranded copper wire to IEC 60228 class 2. |
| Insulation | Mica tape + Halogen free EPR compound. |
| Twinning | Colour coded cores twisted together. |
| Collective Shielding | Pairs/triples are layed up and collectively screened by copper backed polyester tape in contact with a stranded tinned copper drain wire. |
| Pairs/triples are numbered with numbered tape or by numbers printed directly on the insulated conductors. | |
| Outer Sheath | Halogen free thermosetting compound, SHF2, coloured grey (blue for intrinsically safe). |
| Nominal Cross Section Area | mm^2 | 0.75 | 1.0 | 1.5 |
| Nominal Conductor Diameter | mm | 1.1 | 1.3 | 1.6 |
| Maximum Resistant@20℃ | Ω/km | 26.3 | 19.3 | 12.9 |
| Mutual Capacitance | nF/km | 75 | 80 | 85 |
| Nominal Inductance@1KHz | MH/km | 0.727 | 0.686 | 0.667 |
| Maximum L/R@1KHz | μH/Ω | 20 | 25 | 35 |
| Operating Voltage | V | 250 | 250 | 250 |
| Bending Radius | 8×OD (during installation) |
| 6×OD (fixed installed) | |
| Temperature Range | -20℃ ~ +90℃ |
| Construction No. of elements×No. of cores in element×Cross section(mm^2) | Nominal Insulation Thickness (mm) | Nominal Sheath Thickness (mm) | Nominal Overall Diameter (mm) | Nominal Weight (kg/km) |
| 2×2×0.75 | 0.6 | 1.1 | 10.2 | 185 |
| 4×2×0.75 | 0.6 | 1.2 | 12.5 | 240 |
| 7×2×0.75 | 0.6 | 1.4 | 15.0 | 350 |
| 8×2×0.75 | 0.6 | 1.4 | 16.3 | 395 |
| 12×2×0.75 | 0.6 | 1.5 | 19.5 | 540 |
| 16×2×0.75 | 0.6 | 1.6 | 21.8 | 690 |
| 19×2×0.75 | 0.6 | 1.7 | 23.2 | 780 |
| 24×2×0.75 | 0.6 | 1.8 | 26.7 | 985 |
| 32×2×0.75 | 0.6 | 2.1 | 29.6 | 1225 |
| 2×3×0.75 | 0.6 | 1.2 | 12.0 | 205 |
| 3×3×0.75 | 0.6 | 1.2 | 13.1 | 265 |
| 4×3×0.75 | 0.6 | 1.3 | 14.4 | 320 |
| 7×3×0.75 | 0.6 | 1.3 | 17.4 | 475 |
| 8×3×0.75 | 0.6 | 1.5 | 19.5 | 590 |
| 12×3×0.75 | 0.6 | 1.6 | 22.9 | 745 |
| 16×3×0.75 | 0.6 | 1.7 | 25.6 | 965 |
| 19×3×0.75 | 0.6 | 1.8 | 27.2 | 1095 |
| 24×3×0.75 | 0.6 | 2.0 | 31.6 | 1405 |
| 2×2×1.0 | 0.6 | 1.1 | 10.7 | 210 |
| 4×2×1.0 | 0.6 | 1.1 | 13.3 | 285 |
| 7×2×1.0 | 0.6 | 1.4 | 16.0 | 415 |
| 8×2×1.0 | 0.6 | 1.4 | 17.3 | 465 |
| 12×2×1.0 | 0.6 | 1.6 | 20.8 | 645 |
| 16×2×1.0 | 0.6 | 1.7 | 23.3 | 825 |
| 19×2×1.0 | 0.6 | 1.8 | 24.7 | 940 |
| 24×2×1.0 | 0.6 | 1.9 | 28.8 | 1200 |
| 32×2×1.0 | 0.6 | 2.3 | 31.8 | 1495 |
| 3×3×1.0 | 0.6 | 1.2 | 14.0 | 310 |
| 4×3×1.0 | 0.6 | 1.4 | 15.3 | 380 |
| 7×3×1.0 | 0.6 | 1.6 | 18.6 | 570 |
| 12×3×1.0 | 0.6 | 1.6 | 24.4 | 900 |
| 16×3×1.0 | 0.6 | 1.7 | 27.3 | 1160 |
| 19×3×1.0 | 0.6 | 1.9 | 29.0 | 1325 |
| 24×3×1.0 | 0.6 | 2.1 | 33.7 | 1700 |
| 2×2×1.5 | 0.7 | 1.2 | 12.1 | 275 |
| 4×2×1.5 | 0.7 | 1.3 | 15.2 | 380 |
| 7×2×1.5 | 0.7 | 1.5 | 18.4 | 565 |
| 8×2×1.5 | 0.7 | 1.5 | 20.0 | 640 |
| 12×2×1.5 | 0.7 | 1.7 | 24.3 | 895 |
| 16×2×1.5 | 0.7 | 1.8 | 27.2 | 1150 |
| 19×2×1.5 | 0.7 | 1.9 | 28.6 | 1295 |
| 24×2×1.5 | 0.7 | 2.1 | 33.5 | 1670 |
| 32×2×1.5 | 0.7 | 2.3 | 37.0 | 2095 |
| 2×3×1.5 | 0.7 | 1.3 | 15.0 | 310 |
| 3×3×1.5 | 0.7 | 1.3 | 16.0 | 420 |
| 4×3×1.5 | 0.7 | 1.4 | 17.7 | 515 |
| 7×3×1.5 | 0.7 | 1.6 | 21.5 | 785 |
| 8×3×1.5 | 0.7 | 1.6 | 23.5 | 930 |
| 12×3×1.5 | 0.7 | 1.8 | 28.5 | 1255 |
| 16×3×1.5 | 0.7 | 1.9 | 31.9 | 1630 |
| 19×3×1.5 | 0.7 | 2.0 | 33.8 | 1855 |
| 24×3×1.5 | 0.7 | 2.2 | 39.3 | 2375 |
