Introduction to RFOU Offshore Power Cables
Offshore oil and gas platforms operate in environments where electrical reliability is not optional—it is essential for safety, production continuity, and environmental protection. RFOU offshore power cables, manufactured to the Norwegian standard NEK 606, are the specialized cables engineered to deliver power and control signals in the harsh conditions of the North Sea and offshore installations worldwide.
From fixed platform power distribution to flexible drill floor applications, RFOU cables provide the flame retardancy, oil resistance, and mechanical durability required by the offshore oil and gas industry. TEBAOFLEX manufactures a comprehensive range of RFOU offshore cables compliant with NEK 606 and NORSOK standards, serving operators and EPC contractors across the global offshore energy sector.
What Are RFOU Offshore Power Cables?
RFOU is a cable designation under the NEK 606 standard (Norwegian Electrotechnical Committee standard for offshore cables). The designation breaks down as follows:
- R — Rubber insulation (EPR, ethylene propylene rubber)
- F — Flame retardant (IEC 60332-3 Category A)
- O — Oil resistant outer sheath (typically SHF or CSP compound)
- U — UV resistant and weather resistant for outdoor exposure
RFOU cables are designed for fixed installation on offshore platforms, ships, and floating production systems. They combine EPR insulation rated for 90°C with oil-resistant, flame-retardant, UV-stable sheaths that withstand the combined challenges of saltwater, hydrocarbon exposure, and fire safety requirements. Explore our offshore cable product range for available configurations.
NEK 606 Standard and NORSOK Compliance
The NEK 606 standard was developed by the Norwegian electrotechnical committee specifically for cables used in offshore installations. It has become the de facto international standard for offshore oil and gas cables, adopted across the North Sea, Gulf of Mexico, West Africa, and Southeast Asia. Key requirements include:
- Insulation: EPR per IEC 60502-1/2, rated 90°C continuous
- Flame retardancy: IEC 60332-3 Category A (most stringent bunched cable flame test)
- Fire performance: IEC 60331 (fire resistance) for emergency circuits, IEC 60754 (low smoke and halogen-free)
- Oil resistance: Sheath materials tested per IEC 60811 for prolonged oil exposure
- UV resistance: Sheath compounds stabilized for outdoor tropical and arctic exposure
- Low smoke: LSZH (low smoke zero halogen) sheath options for enclosed module areas
The NORSOK standards (particularly NORSOK R-004 for cable installation and NORSOK C-001 for electrical installations) reference NEK 606 cables for offshore fixed installations. View our NEK 606 type approval certificates.
Construction and Design
RFOU offshore power cables feature multi-layer construction engineered for the combined demands of the offshore environment:
Conductor
Tinned copper conductors per IEC 60228 Class 2 (stranded) or Class 5 (flexible) for installations requiring vibration resistance and flexibility. Tinning prevents galvanic corrosion in salt-laden atmospheres.
Insulation
EPR (ethylene propylene rubber) insulation rated for 90°C continuous conductor temperature. EPR provides excellent moisture resistance, thermal aging stability, and maintains dielectric properties over 25+ year service life.
Screen and Armor
Copper tape or copper wire braid screens provide EMC protection for power and control circuits. For mechanical protection, galvanized steel wire armor (SWA) or tinned copper braid armor is applied, with non-magnetic armor for single-core AC cables.
Outer Sheath
SHF (semiconductor-free halogen-free) or CSP (chlorosulfonated polyethylene) outer sheath provides oil resistance, UV stability, flame retardancy, and low smoke emission. Color coding: typically black for power and grey or orange for control/instrumentation circuits.
Technical Specifications
| Parameter | LV Power (0.6/1 kV) | MV Power (1.8/3 – 8.7/15 kV) |
|---|---|---|
| Standard | NEK 606 / IEC 60502-1 | NEK 606 / IEC 60502-2 |
| Conductor | Tinned Cu, Class 2 or 5 | Tinned Cu, Class 2 |
| Insulation | EPR | EPR + semicon screen |
| Max Temperature | 90°C | 90°C |
| Outer Sheath | SHF / CSP (LSZH) | SHF / CSP |
| Flame Standard | IEC 60332-3 Cat. A | IEC 60332-3 Cat. A |
| Fire Resistant | IEC 60331 (optional) | IEC 60331 (optional) |
| Oil Resistance | IEC 60811-2-1 | IEC 60811-2-1 |
| UV Resistance | EN 60811-4-1 | EN 60811-4-1 |
| Armor | SWA / Cu braid (optional) | SWA |
Offshore Applications
RFOU cables serve critical functions across offshore platform systems:
Platform Power Distribution
LV and MV RFOU power cables distribute electricity from generators and switchgear throughout the platform modules. Fixed installations use armored types for cable trays and unarmored types for indoor routing. See offshore application cases.
Drill Floor and BOP Control
Flexible RFOU cables (Class 5 conductors) power and control drilling equipment, blowout preventers, and mud pump systems where vibration and mechanical stress are severe.
Emergency and Safety Systems
Fire-resistant RFOU cables (IEC 60331 certified) power emergency lighting, fire water pumps, gas detection systems, and PA systems that must maintain function during fire conditions.
Subsea and Water Injection
For subsea boost pumps and water injection systems, specialized RFOU cables with additional water-blocking layers and armor protection deliver power from platform to subsea equipment.
Selection Guide for RFOU Cables
- Determine voltage rating: LV (0.6/1 kV) for general power and control, MV (up to 8.7/15 kV) for main distribution and large motors
- Select installation type: Fixed (Class 2 conductor) or flexible (Class 5 conductor) for dynamic applications
- Choose sheath material: SHF/LSZH for enclosed modules, CSP for exposed deck areas with oil exposure
- Verify fire requirements: IEC 60332-3 Cat. A mandatory; IEC 60331 for emergency circuits
- Check oil and UV resistance: Confirm sheath compound meets IEC 60811 oil test and EN 60811 UV test
- Specify armor: SWA for mechanical protection in trays; non-magnetic for single-core AC
- Verify NEK 606 compliance: Confirm type approval and material certificates — view our certifications
- Request engineering support: For platform-specific requirements, contact TEBAOFLEX
Why Choose TEBAOFLEX RFOU Cables
TEBAOFLEX is a specialized manufacturer of NEK 606 offshore cables, supplying EPC contractors and operators worldwide:
- Full RFOU cable range: LV and MV, power, control, and instrumentation types
- NEK 606 compliant with type test reports for all cable types
- SHF, CSP, and LSZH sheath options for all offshore environments
- IEC 60331 fire-resistant constructions for emergency circuits
- Custom designs with integrated signal pairs and fiber optic cores for subsea systems
Our custom manufacturing services support platform projects from FEED to commissioning. For specifications and type approval certificates, contact TEBAOFLEX or browse our product catalog.
Request a Quote
Need RFOU offshore power cables for your platform or FPSO project? Our engineering team will respond within 24 hours with detailed specifications, type test reports, and pricing. Submit your offshore cable inquiry to TEBAOFLEX.
