Comprehensive Detailed Introduction to Marine Cables

1. Definition & Core Position

2. Mandatory Compliance & Regulatory Framework

2.1 Core International Standards & Conventions

• IEC 60092 Series: The global universal benchmark for marine electrical installations, covering all technical specifications of marine cables:
  • IEC 60092-350: Power cables for shipboard and offshore installations
  • IEC 60092-351: Control and instrumentation cables for shipboard and offshore installations
  • IEC 60092-352: Communication and data transmission cables for ships
  • IEC 60092-353: Fire-resistant cables for shipboard emergency systems
  • IEC 60092-354: Low smoke zero halogen (LSZH) cables for ships and offshore units
  
  
• SOLAS Convention: Mandatory requirements for marine cable fire safety, emergency power supply, explosion protection, and passenger ship safety (Chapter II-2 for fire prevention, Chapter III for life-saving appliances)
• IMO Circulars: Supplementary guidelines such as MSC.1/Circ.1511 (Guidelines on the Selection and Installation of Shipboard Cables) and MSC.1/Circ.1619 (Mooring Equipment Guidelines)
• Explosion Protection Standard: IEC 60079 series for cables used in hazardous areas on oil tankers, chemical tankers and offshore platforms

2.2 Classification Society Certification

2.3 Regional Special Requirements

• EU: CE marking, compliance with EN 50288 series standards
• United States: USCG approval, ABS Rules for Building and Classing Marine Vessels
• China: GB/T 9331 series (marine power cables) and GB/T 20637 series (marine control cables)
• Passenger ships: Mandatory full-ship LSZH cable requirement under SOLAS Chapter II-2

3. Core Structure of Marine Cables

1. Conductor

   
   

   Mandatory annealed tinned copper stranded conductor (compliant with IEC 60228 Class 5/6) for all marine cables. The tin plating layer provides excellent resistance to seawater corrosion and oxidation, improves soldering performance, and the stranded structure ensures superior flexibility to withstand long-term vibration and bending from ship navigation. Available in single-core, 2-core to 61+ multi-core configurations for different applications.
   
   
2. Insulation Layer

   
   

   The core layer for electrical isolation, with marine-specific materials selected for electrical performance, temperature resistance and environmental adaptability:
   
   
   • XLPE (Cross-linked Polyethylene): The most mainstream material for marine cables, with a long-term working temperature of 90℃, short-circuit withstand temperature of 250℃, excellent electrical properties, oil resistance and mechanical strength, suitable for over 90% of conventional power and control circuits.
   • EPR (Ethylene Propylene Rubber): Superior flexibility, low temperature resistance and vibration resistance, ideal for frequently bent and moving scenarios such as equipment connection cables in the engine room.
   • PVC (Polyvinyl Chloride): Low-cost option with a working temperature of 70℃, only used for non-critical areas of inland waterway vessels and ordinary cargo ships.
   • Special Insulation: Silicone rubber (180℃ high temperature resistance) for high-temperature areas in the engine room, and low-temperature resistant materials for LNG carriers and polar vessels.
   
   
3. Inner Sheath / Bedding

   
   

   Extruded over the insulated cores to protect the insulation layer, provide a smooth contact surface for the armouring layer, and prevent moisture ingress. Made of PVC, PE or LSZH materials, with a filling layer for multi-core cables to ensure roundness and structural stability.
   
   
4. Armouring Layer (Optional)

   
   

   The core protective structure for heavy-duty scenarios, providing mechanical protection, electromagnetic shielding and auxiliary earthing functions. Main types include:
   
   
   • Steel Tape Armouring (STA): Radial compression and crushing resistance, for fixed installation in indoor and under-deck areas.
   • Steel Wire Armouring (SWA): Extreme axial tensile, impact and bending resistance, for open weather decks, long-distance suspended installation and high mechanical risk areas.
   • Non-ferrous Metal Armouring: Copper tape or braided copper wire for electromagnetic shielding, used for instrumentation and signal cables in high-interference environments.
   • Composite Armouring: Combined steel tape + steel wire + copper tape structure for extreme offshore working conditions.
   
   
5. Outer Sheath

   
   

   The outermost layer directly exposed to the marine environment, with marine-specific formulations that must meet mandatory requirements for salt spray resistance, oil resistance, mould resistance, UV resistance, flame retardancy and wear resistance. Mainstream materials:
   
   
   • LSZH (Low Smoke Zero Halogen): Mandatory for passenger ships, ro-ro ships and high-end offshore platforms, emitting low smoke, non-toxic and non-corrosive gas in case of fire to ensure personnel escape.
   • CSP/CSPE (Chlorosulfonated Polyethylene): Excellent oil resistance, weather resistance and flame retardancy, ideal for engine rooms and open weather decks.
   • PUR (Polyurethane): Superior wear and tear resistance, for frequently moving scenarios such as winch and marine robot cables.
   • PVC: Low-cost option for inland waterway vessels.
   
   

4. Comprehensive Classification of Marine Cables

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