NEK 606 Mud Resistant Power Cable

Power feeders into mud pump rooms, shale shaker houses and drill floor equipment carry the highest fault consequence on a drilling unit — and run through the most chemically aggressive zones. The NEK 606 mud resistant power cable is the 0.6/1kV construction built for exactly this duty: oil and mud resistant sheath over a flame retardant, halogen free, low smoke platform, qualified for drilling fluid exposure per project specification. This page covers construction, mud resistance classes and how to specify the cable for mud zone power distribution.

Product Overview

Mud resistant power cables feed pumps, compressors, drawworks and processing equipment in zones where oil based mud, brine and completion chemicals routinely contact the cable surface. Standard shipboard power cable sheaths swell, soften and crack within months in this service; the mud resistant construction uses qualified compounds that maintain mechanical and electrical integrity after prolonged drilling fluid exposure.

Typical constructions follow the IEC 60092-353 architecture with the NEK 606 mud resistant overlay: tinned stranded copper class 2 conductors, mica tape available for fire resistant variants, XLPE or EPR insulation, optional electrostatic screen, copper wire braid or galvanized steel wire braid armour, and a special oil and mud resistant halogen free sheath of SHF2 type. Voltage rating 0.6/1kV with 1.8/3kV on request, temperature class 90°C. Core configurations cover single core from 10mm2 to 400mm2, three core from 1.5mm2 to 240mm2, and earth core arrangements such as 3x25+1x16, 3x50+1x25, 3x95+1x50, 3x120+1x70, 3x150+1x95 and 3x185+1x95. Exact constructions are confirmed per project against the zone classification and drilling fluid types.

Key Features / Construction

• Conductor: tinned stranded copper, class 2, per IEC 60228

• Fire resistant option: mica glass tape layer for circuit integrity per IEC 60331 where emergency circuits require it

• Insulation: XLPE or EPR, 90°C rated, halogen free

• Screen: optional copper wire braid or metallic tape for defined earth path

• Armour: copper wire braid or galvanized steel wire braid for mechanical protection; steel braid not used on single core AC cables

• Outer sheath: special oil resistant, mud resistant, halogen free and low smoke compound, SHF2 type, qualified per NEK 606 mud resistance class

• Flame retardance: IEC 60332-3-22 Category A; halogen free per IEC 60754-1/2; low smoke per IEC 61034 with light transmittance above 60%

• Marking: type designation, voltage, size, mud resistance class and test reference per project documentation

Mud Resistance Classes and Qualification

NEK 606 defines mud resistance classes verified by immersion testing in representative drilling fluids at elevated temperature, followed by mechanical and electrical verification. Qualification attaches to the sheath compound, not just the cable type — so procurement should state the required class, and the TDS should carry compound-level test evidence. For the difference between mud resistance and general oil resistance, and why IEC 60092 coverage alone is insufficient in mud service, see our NEK 606 guide.

Standards & Certifications

• NEK 606: offshore cable requirements including mud resistant designs and qualification classes

• IEC 60092-350, IEC 60092-353 and IEC 60092-360: construction, test methods and materials for shipboard power cables

• IEC 60332-3-22 Category A: bunched flame retardance

• IEC 60331-1/2: optional fire resistant circuit integrity at 830°C

• IEC 60754-1/2: halogen free performance; IEC 61034-1/2: low smoke emission

• Mud resistance and oil resistance tests per project specification, with compound-level reports

Classification society documentation can be confirmed per project scope. Refer to the Certifications page or contact us with your class and mud zone requirements.

Applications

• Mud pump and shaker power feeders on drill ships and platforms

• Drill floor drawworks, top drive and auxiliary power supply

• Mud tank and mixing area power distribution

• Process deck equipment in produced water and chemical exposure zones

• FPSO mud zone and hydrocarbon processing power circuits

• Retrofit replacement of degraded standard sheathed cables in mud service

Why Choose Anhui Tiankang

• Compound-level mud resistance qualification with test evidence per project, not generic declarations

• Full fire performance stack available: flame retardant, halogen free, low smoke, optional IEC 60331 fire resistance

• Size range from 10mm2 single core to 240mm2 three core with earth core configurations for feeder duty

• Related NEK 606 mud resistant cable range including control and instrumentation types for complete mud zone schedules

Selection Guide / Buying Considerations

1. Confirm the zone classification and drilling fluid types — oil based mud, water based mud or brine set the required mud resistance class.
2. State voltage and size: 0.6/1kV standard, core configuration such as 3x25+1x16, 3x50+1x25, 3x95+1x50 or 3x120+1x70.
3. Decide fire performance: flame retardant halogen free standard, or mica taped fire resistant variant for emergency circuits.
4. Confirm armour: steel wire braid for three core mechanical protection, copper wire braid for single core.
5. State quantity, drum lengths and destination port.

Your cable schedule or a photo of the existing cable marking is enough for a first accurate quotation.

FAQ

Q1: What is the difference between this cable and standard shipboard power cable?
The construction follows IEC 60092-353, but the sheath compound is qualified for drilling fluid exposure per NEK 606 mud resistance classes. Standard sheathed cable degrades within months in mud service even though it passes all IEC tests.

Q2: Is fire resistance available in mud resistant construction?
Yes. A mica glass tape layer provides IEC 60331 circuit integrity while retaining the mud resistant sheath — combined fire and chemical survival for emergency circuits in mud zones.

Q3: How do I verify mud resistance before ordering?
Request the immersion test report naming the sheath compound, drilling fluid type, temperature, duration and post-test results. See our NEK 606 guide for what a valid claim looks like.

Q4: What sizes are available?
Single core from 10mm2 to 400mm2, three core from 1.5mm2 to 240mm2, with earth core configurations per IEC 60092-353 practice.

Q5: What information is needed for a quotation?
Zone classification and fluid types, voltage and core configuration, fire performance requirement, armour preference, quantity and destination port. Use the contact page to send your cable schedule.

Downloads & Certificates

TDS - NEK 606 Mud Resistant Power Cable 0.6/1kV (PDF)

Certificates: DNV TAE000050C · BV 54112/B0 BV · RINA ELE005524WS/001

Full certificate library: Certifications & Test Reports. Project-specific test reports available on request.

Contact / Request a Quote

Send your offshore cable schedule, zone classification or drilling fluid data through the contact page. We will confirm the mud resistance class, fire performance and construction per line, and return a quotation with compound-level test evidence. For system level selection see our offshore cable solutions and the Marine & Offshore Cables range.