NEK 606 Offshore Cable Standard
NEK 606 is the Norwegian electrotechnical standard for the Offshore Oil and Gas, Ship, and Marine Industries. This specification covers the basic requirements for halogen-free and mud-resistant low and high voltage power, control, lighting, instrumentation, telecommunication, optical fibre cables, and Hydro Carbon Fire Resistant (HCF) cables.
Application:
The offshore HV & LV power cables are used for electrical power transmission on drilling ships & drilling platforms (jack-up, semi-submersible), production platforms (TLP, semi-submersible, SPAR, fixed platforms), and FPSO/FSO. Instrumentation and control cables are vital in offshore platforms and ships to control and drive sensors, valves, measurement devices, and alarm systems.
Cable Types and Codes
| Power and Control Cables | Fire Resistant Power and Control Cables |
|---|---|
| P1, P1/P8 RFOU/TFOU 0.6/1kV | P5, P5/P12 BFOU 0.6/1kV |
| P15 UX 0.6/1kV | P17 BU 0.6/1kV |
| P18 RU 0.6/1kV | P34 BFOU-HCF 0.6/1kV |
| Medium Voltage Power Cables | Fire Resistant High Voltage Power Cables |
|---|---|
| P2, P2/P9 RFOU/TFOU 3.6/6kV | P6, P6/P13 BFOU 3.6/6kV |
| P3, P3/P10 RFOU/TFOU 3.6/6kV | P7, P7/P14 BFOU 6/10kV |
| P4, P4/P11 RFOU/TFOU 8.7/15kV | P30 RFOU-HCF 6/10(12)kV |
| P19, P19/P21 RFOU 12/20kV | P30 TFOU-HCF 6/10(12)kV |
| Instrumentation Cables | Fire Resistant Instrumentation Cables |
|---|---|
| S1, S1/S5 RFOU(i) 250V | S3, S3/S7 BFOU(i) 250V |
| S2 RFOU( c ) 250V | S4, S4/S8 BFOU( c ) 250V |
| S2/S6 RFOU( c ) 250V | S13 BU(i) 250V |
| P16 IFLI 250V | S14 BU( c ) 250V |
| S11 RU(i) 250V | S15 BFOU-HCF(i) 250V |
| S12 RU( c ) 250V | S16 BFOU-HCF( c ) 250V |
| Telecommunication Cables | Optical Fibre Cables |
|---|---|
| S9 IYXI( c ) 60V, S10 IYOI( c ) 60V | F1 QFCI, F5 QFCB, F6 AICI |
| Data Cables | Coaxial Cables |
|---|---|
| Cat5E UTP/FTP, Cat6 UTP/FTP | RG6, RG11, RG59, RG58, RG213 |
Cable Code Designations
The cable code is structured in four positions:
| 1. Insulation | 2. Inner Sheath | 3. Armour | 4. Outer Sheath |
|---|---|---|---|
| B (Fire resistant+insulation) | F (Inner covering) | L (Aluminium) | I (SHF1) |
| R (EPR) | Y (Screen) | X (No armour) | U (SHF2) |
| T (XLPE) | I (SHF1) | O (Copper wire braid) | U (SHF Mud) |
| I (Thermoplastic compound) | A (Strength yarn) | B<sup>1)</sup> | |
| U (Thermoset compound) | C (Steel wire braid) | ||
| A (Fibre, tight buffered) | |||
| Q (Fibre in loose tube) |
Note:
<sup>1)</sup> For QFCB cables only.
Collective screen = ( c ), Individual pair or triple screen = ( i ), for instrumentation cables.