NEK 606 Offshore Cable

Every offshore platform requires an extensive and integrated power, instrumentation, control, and communication system able to perform under the most demanding working conditions, whilst preserving both human safety and the environment.


Offshore Cable

Our offshore cable has already provided cabling solution in oil production locations throughout the world for more than 10 years. The NEK 606 offshore cables are able to achieve and maintain high performance in harsh conditions of heat, cold, humidity, oil, vibration and salt corrosion, etc.

Grand Ocean Marine is able to provide a harmonized cabling solution suitable for any type of offshore application such as FPO, FPSO, Drilling Ship, Topside, FSU and also includes products for upstream, downstream and processing, land-based power generation and marine uses.

Different Types of NEK 606 Offshore Cables

The offshore power cable is applicable to power, lighting and control systems on an offshore platform and intended for fixed installation. It is fire retardant, low smoke, zero halogens, and mud resistant cable is also available.

Offshore variable frequency drive (VFD) cable is designed to carry power from AC drive systems to AC motors on an offshore platform. Rating voltage is 0.6/1kV or 1.8/3kV. Offshore VFD cable has outstanding electromagnetic compatibility

The offshore wire is applicable to earthing wire, bonding wire and single wire on the offshore platform for fixed installation up to 0.6/1kV. It is fire retardant,low smoke and halogen free. Flexible cable conductor is also available.

Offshore Instrumentation cable is designed for instrumentation and information proceeding systems on the offshore platform. It is flame retardant, low smoke, halogen-free. It can be an overall screen or individual screen.


Why Choose Us

ABS & DNV-GL Approved

Our offshore cable is produced according to NEK 606 standard. All offshore cable types are approved by ABS and DNV-GL classification societies.

Flexible Payment Options

Our payment options include T/T, L/C or O/A. Offshore cables are inspected by us or a third party. We guarantee a full refund if cables are not approved.

Quick Response

Our sales team respond to offshore cable inquiries within 12 hours during the working time. Feel free to contact us anytime for urgent requirements.

Fast Delivery

We have a wide stock of marine offshore cables. The delivery time can be in 5 days for stock cables and 15-30 days for custom-made offshore cable.

We’re Proud To Have All the Certificates for Our Marine Equipment

Your Reliable Supplier of NEK 606 Offshore Cable in China, ABS & DNV-GL Approved

Complete Buying Guide of Offshore Cable

What is Offshore Cable?

Offshore cable, also names oil & gas cable, is designed for electrical power and instrumentation application on offshore units. The offshore cable serves as a source of medium for supplying electric power and instrumentation.

The marine offshore environment is harsh therefore, the offshore cable should be not only durable but also powerful. This helps them to withstand the tough conditions in which the offshore cables have to survive in.

Moreover, an offshore cable should have the utmost protection against fire and flame.

They are also mud resistant and halogen-free which enables them to stay protected against drilling oils and hydrocarbons. The design of offshore cable allows them to work efficiently in extreme temperatures and to be resistant to humidity, oil, acid, and saltwater corrosion.

There are numerous platforms where you can use offshore cables. These include shipboard wiring, offshore platforms, installations at the sea for setting up oil rigs, and other similar activities.

Offshore cables have to fulfill all safety standards very strictly. This is because the cables work in isolated environments which cannot be reached out instantly in case of an emergency.

Access to offshore facilities is therefore difficult which makes it vital to meet the safety standards. For this reason, offshore cables are halogen-free to make them toxic-free and safe.

Offshore Cable Standards

To make sure that the quality of the offshore cable is up to the mark, manufacturers have to follow certain standards.

NEK 606

NEK 606 is a Norwegian standard or technical specification (TS) set for the applications in the marine industry like offshore oil & gas drilling, ships, ship manufacturing, and other industries that use instrumental, power, or earth cables.

NEK 606 standards make sure that the offshore cables are mud-resistant, halogen-free alongside being fire-resistant or flame-retardant.

Besides, NEK 606 standards ensure that the offshore cables have SHF2 rated sheathing which is both thermosetting halogen-free and mud-resistant.

IEEE 1850 type P

As you might know that the conditions where these offshore cables have to survive to tend to be tough and harsh. Therefore, it is important to design cables that can overcome this stress.

For this reason, the offshore cables should have an IEEE 1850 standard. Defined by the Institute of Electrical and Electronics Engineers (IEEE), this standard takes care of the installation of offshore cables.

To install the offshore cables properly it is vital to make sure that the manufacturers follow the best engineering practices and a strict set of regulations. Thus making the cable durable and stronger.

Offshore Cable Types

  • Power cable: RFOU, BFOU, TFOU, RFCU, RU, BU.
  • Instrumentation cable: RFOU(i), RFOU(c), RFOU(i&c), BFOU(i), BFOU(c), BFOU(i&c).
  • Earth cable: P15 UX.

Code Meaning Here is the code used for different materials used in offshore cables:

  • B: halogen-free fire-resistant tape insulation around the conductor.
  • R: halogen-free Ethylene Propylene Rubber (EPR).
  • T: Cross-linked Polyethylene (XLPE)
  • U: halogen-free thermostat compound EVA or EMA
  • F: halogen-free inner covering
  • X: no armor used
  • O: tinned copper wire braid for armor
  • C: galvanized steel wire braid
  • U: halogen-free thermoset compound SHF 2 or mud-resistant thermoset compound SHF Mud for outer sheath.
  • (i): individual screen
  • (c): collective screen

What is the difference between RFOU and BFOU?

RFOU and BFOU are both offshore power cables that can be used in a variety of ways in the marine environment, like for oil rigs, offshore platforms, and drilling rigs.

These cables are halogen-free which makes them safe and toxic-free. Keep in mind, offshore facilities, as well as ships, operate in isolated environments where help is not quickly accessible.

This is why offshore power cables have to meet strict safety and fire standards. Similarly, they are also mud resistant which makes them excellent options for oil rig facilities with some of the harshest conditions for power cables.

What is RFOU Cable?

RFOU cable is a flame retardant instrumentation and power cable, which means it is chemically processed to resist fire, to burn slow, and is self-extinguishing. RFOU cables pass several tests set by the IEC standards for the offshore power cable to meet the quality.

For example, it meets the IEC 60032-3-22 standard that is set to describe cable’s performance against high temperatures. This is a test for a vertical flame spread in case the cable is vertically mounted in the form of bunched cables.

What is BFOU Cable?

BFOU cable is a fire-resistant cable which means it is made of materials that are nonflammable. This makes them fire-resistant, as they don’t melt or drip even when exposed to fire.

The BFOU cable meets the IEC 60331 standard, which means it passes the test in which the cable is tested against the temperature of at least 830 C.

Even though both are offshore cables designed to be used in the offshore and marine environment and almost have similar structures and materials, there is one key difference between both.

RFOU is a flame retardant while BFOU is fire resistant. This is why, to understand the difference between both, we first need to understand the difference between fire-resistant and flame retardant material.

Even when many consider both terms interchangeably, but it is not true. Both are types of fire-safety standards that make sure that these offshore cables are not flammable that makes offshore facilities secure.

These are made of commonly available materials that may not be counted among nonflammable materials, but as they are chemically treated, they are self-extinguishing as well as slow to burn.

Offshore Cable Certification

Several classification societies are present all over the world that give out certificates in accordance with the offshore cable quality. This means that the more certifications an offshore cable has, the better standards it will offer.

So these certifications help you out in deciding which offshore cable will have the best quality. Here is a list of a few important classifications:


American Bureau of Shipping offers this certification. In order to obtain this certification, the offshore cable manufacturers have to undergo several assessment checks which include Product Design Assessment (PDA) and Manufacturing Assessment (MA).

ABS also offers Type Approval certifications. A certain set of rules and standards are set by the American Bureau of Shipping specifically for offshore cables. Based on these rules, a number of audits and compliance checks take place.

This process takes place throughout the manufacturing process so that the product is up to the standards to fulfill the certification criteria.

This ensures that not only the material and quality of the offshore cable are up to the mark but it also goes onto prove that the whole manufacturing process is satisfying the industry quality standards.


One of Europe’s leading certification and classification is DNV-GL which started in 2013. It is a merger of two companies: a German company, Germanischer Lloyd (GL), and a Norwegian company, Det Norske Veritas (DNV).

The company is famous for not only certifying offshore cables but also for marine cables and the oil, gas industry. In the start, both the countries worked on certifying only offshore cables for a very long time. After this, they took up certifying other industries.

To achieve a certification from DNV-GL, the offshore cable has to meet the standards set by both, the Norwegian and the German company. Once an offshore cable has been verified by DNV-GL, it means that it conforms to European quality standards.

The process of verification involves a number of tests. These include joint witnessing, manufacturing witnessing, QA and QC process verification, technical design verification, and other tests.

Offshore Cable Product Range

Various types of offshore cables are available and we have reviewed a few for you.

The offshore power cable is designed for power transmission on offshore units, including high voltage, medium voltage, and low voltage cables. Offshore power cable types include BFOU, RFOU, RU, BU, RFCU, BFCU, TFOU. All cables feature halogen-free, low smoke, flame retardant. Fire-resistant or mud resistant cables are also available.

Offshore Power Cable

VFD cable applies to VFD power cable on offshore units and intended for fixed installation.VFD cable has outstanding electromagnetic compatibility. The high-density shield and the compound shield design enable the shield VFD cable with good anti-electromagnetic interference. The flame retardant cable type is RFOU-VFD and the fire-resistant cable type is BFOU-VFD.

VFD Cable

Offshore instrumentation cable is produced according to NEK 606 and IEC 60092-376 standard. It is designed for telecommunication and instrumentation on offshore units and oil rig platforms. It requires low smoke (IEC 61034), halogen-free (IEC 60754), flame retardant (IEC 60332-3), fire-resistant (IEC 60331), and mud resistance in a special application.

Instrumentation cable

Earth cable P15 UX is designed according to NEK 606 and IEC 60092-353 standard with rating voltage 0.6/1kV and max. operating temperature 90℃. Earth cable P15 UX applies to earthing wire, bonding wire, and single wire on offshore units and for fixed installations. P15 UX is a tinned copper wire conductor with polyolefin SHF2 insulation. It features flame retardant, low smoke, and halogen-free.

Earth cable

Offshore Cable Features

Many features constitute a high-quality offshore cable that conforms to international standards. Listed below are some of the characteristics that make a cable durable and efficient.

Flame retardant

Used for power cables and several other cables, IEC 60332-1 & IEC 60332-3-22 is an EIC standard to check the cable for its flame-retardant characteristic.

To ensure that offshore installments are free from the risk of propagating fire, it is very important for the cable to pass this test and meet the EIC standard.

This ensures safety on ship vessels and offshore installments to protect them from being at risk. The offshore cable undergoes a test under very high temperatures to pass this test.

This goes onto prove that the cable will not take part in fire propagation in case there is an accident. By the term flame retardant, in case of exposure to fire, the offshore cable burns at a very slow speed.

To achieve this, the design of the offshore cable uses a coat of fire-resistant chemicals. These do not allow the propagation of fire. Additionally, the offshore cables also use materials that give them a self-extinguishing feature.

Zero Halogen

By zero halogen, we simply mean that the offshore cable is free of halogen. What is the benefit of being halogen-free? Once the offshore cable is halogen-free, it means that it has none of the following elements: chlorine, fluorine, bromine, iodine, and astatine.

These are highly reactive. Due to this, having halogen-free cables make them more protective of the extreme environment to which they are exposed to.

This characteristic of offshore cables offers them to be highly durable. Chlorine and fluorine when used in cables, produce poisonous gases that can risk life in the offshore area and even on ships. Instead of FEP (Fluorinated Ethylene Propylene) or PVC (Polyvinyl Chloride), offshore cables use XLPE (Cross-linked polyethylene) tape and insulation.

They also make use of EPR (Ethylene propylene rubber). For an outer covering, offshore cables use SHF2 which is mud-resistant. SHF2 is a halogen-free thermostat compound.

Low smoke

To ensure the safety of life on ships, another very important feature that offshore cables need to have is low smoke emission. In case of a fire, the cables should not create smoke because this puts lives in danger.

This is what exactly the IEC 61034-1, 2 standard is about. It is basically just a test for smoke density. The burning of the offshore cable investigates the density which the smoke produces.

Fire resistant

Another IEC standard is IEC 60331 which is a test that will check the resistance offered by an offshore cable in case of a fire situation.

For this characteristic or feature, the making of the offshore cable involves the use of inflammable material. The EIC standard uses 830 C to perform this test in order to check the fire-resistant quality of any offshore cable.

This goes on to show that offshore cables remain intact under very high temperatures.

They do not melt away easily. These cables offer great resistance to fire and are extremely difficult to burn. Not only this, but they also prevent the spread of fire. An offshore cable of supreme quality will have all these features.

Mud resistant

The offshore cables should be mud resistant in order to overcome any negative effects that can occur due to corrosion.

Exposure to salt water, acid, and oil make the effect of mud to act faster on the offshore cable in order to destroy it. Thus, manufacturers add special chemicals to the coating of offshore cables.

They tend to overcome the consequences faced when exposed to mud. The sheathing compounds make the cables suitable for installation and functioning in tough conditions.

Technical Data

Current carrying capacities in continuous service at max. Rated conductor temperature of 90℃ and Ambient air temperature is 45°

Nominal cross-sectional area mm2Current Carrying Capacity (A)
Single CoreDouble CoresThree or Four Cores

Correction Factors for Multi-core Cable

Number of CoresCorrection Factors

Correction factors for various ambient air temperatures

Max. Conductor temperatureCorrection factors for an ambient temperature of

Testing Voltage – IEC 60092-30

Rated voltage of cable kVTest Voltage for 5 mins
Alternating current(AC) kVDirect Current (DC) kV

Bending radii for offshore cables rated up to 1.8/3kV

Cable ConstructionOverall Diameter of Cable (D)Minimum internal radius of a bend
EPR XLPEUnarmored≤ 25mm4D
≥ 25mm6D
Composite polyester/metal laminated tape screenAny8D

Bending radii for offshore cables rated up to 3.6/6kV and above

Cable ConstructionThe overall diameter of cable (D)Minimum internal radius of a bend
Single Core CableAny12D
3 Cores CableAny9D


Grand Ocean Marine has already delivered our offshore cables to Singapore, Thailand, The Philippines, Indonesia, Spain, Brazil, UK, Malaysia, India, Pakistan, Greece, Italy,  South Korea, Dubai, UAE,  USA, Vietnam, Mumbai, Ho Chi Minh, Bangkok, etc. If you are looking for a reliable offshore cable supplier from China, you are in the right place.

As a professional supplier of offshore cable, marine cable, rubber cable, welding cable, VFD cable, XLPE / PVC cable, and industrial cables, Grand Ocean Marine aims to provide a complete cable solution for you.