Low Smoke Halogen-Free (LSHF) extremely flexible wind turbine cable rated 2kV and 90°C, engineered for offshore platforms and critical emergency circuits requiring IEC 60331 fire resistance certification.
331HF Fire Resistant Single Conductor Power Cable
Low Smoke Halogen-Free (LSHF) extremely flexible wind turbine cable rated 2kV and 90°C, engineered for offshore platforms and critical emergency circuits requiring IEC 60331 fire resistance certification.
Ratings & Approvals
The 331HF fire resistant cable has earned certification from the world’s leading maritime and offshore classification societies, ensuring compliance with the most stringent international standards for fire safety and electrical performance in hazardous environments.
Standards Compliance Matrix
Comprehensive compliance with international fire safety, flame retardancy, and marine cable construction standards ensures the 331HF meets requirements for critical offshore and wind turbine installations worldwide.
| Standard | Specification | Requirement | 331HF Performance |
|---|---|---|---|
| IEC 60331 | Fire Resistance Testing | Circuit integrity at 750°C for 90 min | ✓ Maintains functionality during fire |
| IEC 60332-3 Cat A | Flame Propagation (Bunched) | Vertical flame spread ≤2.5m | ✓ Self-extinguishing |
| IEEE 1202 | Flame Testing Procedures | 70,000 BTU vertical tray | ✓ Category A compliant |
| IEEE 1580 | Marine Cable Construction | Type LSE/LSX insulation | ✓ NRTL certified |
| UL 1309 / CSA 245 | Shipboard Cable | Marine grade construction | ✓ Dual certified |
| CSA C22.2 No.03 | Cold Bend/Impact Test | -40°C bend / -35°C impact | ✓ Exceeds requirements |
| IEC 60092-350 | Shipboard Cables General | General construction requirements | ✓ Enhanced flexibility design |
Application & Design Purpose
The 331HF cable is specifically engineered for critical circuits in offshore facilities worldwide where circuit integrity must be maintained even during fire conditions. The cable addresses the demanding requirements of wind turbine installations and maritime environments where personnel safety depends on continued electrical function.
Emergency Systems
Critical circuits for emergency lighting, fire detection and suppression systems, alarms, and personnel egress pathways that must remain operational during fire events.
Offshore Platforms
Designed for the demanding environments of offshore oil and gas facilities, FPSOs, drilling rigs, and fixed platforms requiring marine classification society approvals.
Wind Turbines
Extremely flexible construction with high strand count conductors facilitates installation in wind turbine nacelles, towers, and loop cable applications requiring torsional resistance.
Hazardous Areas
Suitable for Class I, Division 1 and Zone 1 environments when installed with appropriate armor and sheath configurations per IEEE 1580 requirements.
Technical Features & Characteristics
Fire Resistant (IEC 60331): Maintains circuit integrity when exposed to flames at 750°C for minimum 90 minutes, ensuring critical systems remain operational.
Flame Retardant: Self-extinguishing per IEC 60332-3 Category A and IEEE 1202 vertical tray flame test (70,000 BTU/hr for 20 minutes).
Low Smoke Halogen-Free: GEXOL®-HF insulation produces minimal smoke and no toxic halogen gases during combustion, protecting personnel evacuation routes.
Superior Flexibility: High strand count tinned copper conductors per IEEE 1580 Table 11 provide significantly improved flexibility versus IEC 60092-350 series cables.
Extreme Cold Performance: Exceeds CSA cold bend/cold impact requirements at -40°C/-35°C for installations in arctic and cold climate environments.
Hazardous Location Rated: Suitable for Class I, Division 1 and Zone 1 explosive atmosphere environments when armored and sheathed.
Optional Armor: Basket weave wire armor available in bronze (standard), aluminum, or tinned copper per IEEE 1580 and UL 1309/CSA 245.
Cross-Linked Insulation: GEXOL®-HF cross-linked polyolefin insulation provides excellent dielectric properties with 2000V/IEC 1000V voltage rating.
Cable Construction
Layer-by-Layer Construction Details
Conductor
Soft annealed flexible stranded tinned copper per IEEE 1580 Table 11. High strand count design maximizes flexibility and vibration resistance.
Fire Resistant Tape
Mica-based fire barrier tape provides circuit integrity per IEC 60331 at temperatures up to 750°C for 90+ minutes.
Insulation (GEXOL®-HF)
Low smoke halogen-free flame retardant cross-linked polyolefin meeting IEEE 1580 Type LSE or LSX requirements.
Jacket
Black low smoke halogen-free flame retardant polyolefin jacket meeting IEEE 1580. Provides mechanical protection and chemical resistance.
Armor (Optional)
Basket weave wire armor per IEEE 1580 and UL 1309/CSA 245. Bronze standard; tinned copper available by request.
Sheath (Optional)
Black low smoke halogen-free flame retardant polyolefin outer sheath meeting IEEE 1580 for armored constructions.
Electrical & Dimensional Specifications
Complete technical data for unarmored and armored 331HF configurations. All specifications per IEEE 1580 with ±5% manufacturing tolerance on nominal dimensions. Ampacity ratings based on 45°C ambient temperature per IEEE 45 methodology.
Unarmored Configuration
| Size AWG/kcmil | Size mm² | Part No. 37-104- | Unarmored | Reactance Ω/1000ft | Voltage Drop V/A/1000ft | DC Resist. @25°C Ω/kft | AC Resist. @90°C Ω/kft | Ampacity (Free Air) | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| OD (in) | Weight (lb/Mft) | 90°C | 90°C | 75°C | 60°C | |||||||
| 18 AWG | 1.0 | 101 | 0.287 | 45 | 0.060 | 12.790 | 7.210 | 9.196 | 18 | 15 | 13 | 9 |
| 16 AWG | 1.3 | 102 | 0.296 | 50 | 0.056 | 8.038 | 4.520 | 5.765 | 25 | 21 | 18 | 13 |
| 14 AWG | 2.1 | 105 | 0.317 | 59 | 0.053 | 5.086 | 2.850 | 3.635 | 40 | 34 | 28 | 21 |
| 12 AWG | 3.3 | 106 | 0.333 | 71 | 0.049 | 3.210 | 1.790 | 2.283 | 51 | 43 | 35 | 26 |
| 10 AWG | 5.2 | 108 | 0.357 | 89 | 0.046 | 2.042 | 1.130 | 1.441 | 64 | 54 | 45 | 33 |
| 8 AWG | 7.6 | 109 | 0.411 | 121 | 0.047 | 1.273 | 0.694 | 0.885 | 80 | 68 | 56 | 41 |
| 6 AWG | 12.5 | 110 | 0.450 | 161 | 0.043 | 0.814 | 0.436 | 0.556 | 104 | 88 | 73 | 53 |
| 4 AWG | 21 | 112 | 0.530 | 237 | 0.038 | 0.559 | 0.286 | 0.376 | 139 | 118 | 97 | 72 |
| 2 AWG | 34 | 114 | 0.596 | 331 | 0.035 | 0.355 | 0.175 | 0.230 | 184 | 156 | 129 | 95 |
| 1 AWG | 43 | 115 | 0.635 | 392 | 0.035 | 0.290 | 0.140 | 0.184 | 212 | 180 | 150 | 109 |
| 1/0 AWG | 54 | 116 | 0.685 | 476 | 0.034 | 0.239 | 0.111 | 0.147 | 244 | 207 | 174 | 125 |
| 2/0 AWG | 70 | 117 | 0.757 | 597 | 0.033 | 0.197 | 0.089 | 0.117 | 282 | 240 | 202 | 145 |
| 3/0 AWG | 86 | 118 | 0.820 | 747 | 0.033 | 0.164 | 0.070 | 0.094 | 327 | 278 | 231 | 168 |
| 4/0 AWG | 109 | 119 | 0.919 | 903 | 0.033 | 0.138 | 0.056 | 0.075 | 381 | 324 | 271 | 196 |
| 262 kcmil | 132 | 120 | 1.013 | 1091 | 0.032 | 0.120 | 0.046 | 0.063 | 445 | 378 | 314 | 229 |
| 313 kcmil | 159 | 121 | 1.067 | 1310 | 0.031 | 0.106 | 0.038 | 0.053 | 498 | 423 | 351 | 256 |
| 373 kcmil | 189 | 122 | 1.129 | 1479 | 0.031 | 0.094 | 0.032 | 0.045 | 558 | 474 | 393 | 287 |
| 444 kcmil | 227 | 123 | 1.193 | 1730 | 0.030 | 0.085 | 0.027 | 0.039 | 642 | 546 | 453 | 331 |
| 535 kcmil | 273 | 124 | 1.314 | 2077 | 0.030 | 0.076 | 0.022 | 0.033 | 681 | 579 | 485 | 351 |
| 646 kcmil | 326 | 126 | 1.397 | 2430 | 0.029 | 0.069 | 0.019 | 0.028 | 789 | 671 | 557 | 407 |
| 777 kcmil | 394 | 127 | 1.494 | 2884 | 0.029 | 0.064 | 0.015 | 0.025 | 888 | 755 | 627 | 458 |
| 1111 kcmil | 562 | 129 | 1.838 | 4338 | 0.028 | 0.053 | 0.011 | 0.017 | 1108 | 942 | 767 | 571 |
Armored (B) and Armored & Sheathed (BS) Configurations
| Size AWG/kcmil | Armored (B) | Armored & Sheathed (BS) | Reactance Ω/1000ft | Voltage Drop V/A/1000ft | ||
|---|---|---|---|---|---|---|
| OD (in) | Weight (lb/Mft) | OD (in) | Weight (lb/Mft) | |||
| 18 AWG | 0.337 | 91 | 0.495 | 153 | 0.071 | 12.801 |
| 16 AWG | 0.347 | 150 | 0.505 | 161 | 0.067 | 8.049 |
| 14 AWG | 0.367 | 110 | 0.525 | 176 | 0.064 | 5.098 |
| 12 AWG | 0.384 | 125 | 0.542 | 193 | 0.060 | 3.222 |
| 10 AWG | 0.408 | 146 | 0.566 | 217 | 0.056 | 2.053 |
| 8 AWG | 0.462 | 261 | 0.620 | 343 | 0.055 | 1.283 |
| 6 AWG | 0.502 | 224 | 0.660 | 319 | 0.051 | 0.823 |
| 4 AWG | 0.580 | 323 | 0.738 | 420 | 0.045 | 0.566 |
| 2 AWG | 0.646 | 427 | 0.804 | 533 | 0.042 | 0.361 |
| 1 AWG | 0.685 | 492 | 0.885 | 645 | 0.041 | 0.296 |
| 1/0 AWG | 0.736 | 584 | 0.936 | 742 | 0.041 | 0.246 |
| 2/0 AWG | 0.808 | 720 | 1.008 | 891 | 0.039 | 0.203 |
| 3/0 AWG | 0.861 | 864 | 1.061 | 1046 | 0.038 | 0.170 |
| 4/0 AWG | 0.969 | 1049 | 1.169 | 1251 | 0.038 | 0.144 |
| 262 kcmil | 1.063 | 1254 | 1.260 | 1473 | 0.037 | 0.125 |
| 313 kcmil | 1.117 | 1481 | 1.317 | 1710 | 0.036 | 0.110 |
| 373 kcmil | 1.179 | 1660 | 1.379 | 1902 | 0.035 | 0.098 |
| 444 kcmil | 1.243 | 1922 | 1.443 | 2175 | 0.034 | 0.089 |
| 535 kcmil | 1.365 | 2288 | 1.565 | 2564 | 0.034 | 0.080 |
| 646 kcmil | 1.448 | 2654 | 1.648 | 2955 | 0.034 | 0.074 |
| 777 kcmil | 1.545 | 3124 | 1.803 | 3536 | 0.033 | 0.068 |
| 1111 kcmil | 1.888 | 4635 | 2.147 | 5132 | 0.032 | 0.057 |
Note: Cable diameters shown as nominal are subject to ±5% manufacturing tolerance. Ampacity based on 45°C ambient temperature per IEEE 45 Table 25 methodology.
Performance Comparison Analysis
331HF vs Standard IEC 60092-350 Series Cables
Fire Safety Performance Ratings
Cable Gland Compatibility (Hawke Types)
The 331HF cable system is compatible with industry-standard Hawke cable glands for various installation environments including safe areas, increased safety (EExe), and explosion-proof (EExd) applications.
| Gland Type | Unarmored | Armored & Sheathed | Hazardous Zone Classification |
|---|---|---|---|
| Industrial & Safe Area (IP68) | 121 | 153-X | Non-Hazardous |
| Increased Safety “EExe” | 501/421 | 501/453/U | Class I, Div. 2 Zone 2 |
| Explosion Proof | 710 | 753 | Class I, Div. 1 Zone 1 & 2 |
| Flameproof “EExd” (≤2L encl.) | 501/421 | 501/453/U | Zone 1 & 2 |
| Flameproof “EExd” (>2L encl.) | ICG | 653/U | Zone 1 & 2 |
Ordering Information
Ordering Example: GEXOL-331HF Cables
To order a single conductor power cable, 2kV, 535 kcmil, bronze armored & sheathed:
Armor Options:
B – Bronze armored only
BS – Bronze armored with outer sheath
Blank – No armor (unarmored)
Tinned Copper Armor – Available by request
Technical References & Citations
Authoritative guidance on LSZH (Low Smoke Zero Halogen) compounds for underground applications, emphasizing the critical importance of reducing toxic emissions during fires in confined spaces. The guide details how proper cable selection contributes to personnel safety and equipment longevity in demanding industrial sectors.
The IEEE 1580 standard provides requirements for single or multiconductor cables rated 300V to 35kV, intended for marine vessels, fixed and floating offshore facilities, including offshore wind electrical substations. The standard ensures cables meet strict performance criteria for harsh maritime environments.
Fire resistant cables manufactured to IEC 60331 are ideal for fixed installations in offshore applications including open deck areas, permanent wiring in ships, mobile and fixed offshore rigs. Applications include safety and emergency lighting, fire pumps, shut down systems, and communication systems.
Technical overview of wind turbine cable requirements including temperature resistance from -40°C to +90°C, LSOH material demands for fire safety, and the critical role cables play in delivering energy from wind turbines through nacelle, tower and base installations.
Type P Rig Cables are specifically designed for harsh environments including severe cold, high heat, constant vibration, drilling mud, mechanical stress, and salt corrosion. Offshore applicable standards include IEEE 1580 (Construction & Performance) and UL 1309.
Fire resistant cables designed for exceptional performance under flame, tested in accordance with IEC 60331 at 750°C for 180 minutes minimum without short circuits and with continuity integrity. Construction includes fire resistant mineral ceramic barrier and LSZH compounds.
Request Technical Consultation
Our engineering team provides comprehensive support for 331HF fire resistant cable selection, custom configurations, and offshore wind turbine applications.
