Description
Flex Cable 16mm 5 Core: Heavy-Duty Industrial Power Cable
Multicore flexible cables are essential for distributing power in demanding industrial and commercial settings. This 16mm² 5-core cable features five insulated conductors, typically colour-coded for easy identification in three-phase systems, making it ideal for applications requiring neutral and earth connections alongside the three phases .
The generous 16mm² conductor size offers substantial current-carrying capacity, typically rated for circuits up to 70-100 Amps depending on insulation type and installation conditions . This makes it suitable for heavy machinery, industrial equipment, and high-power distribution where reliable performance is essential.
Flex Cable 16mm 5 Core: Key Specifications
| Specification | Details |
|---|---|
| Conductor Size | 16 mm² per core |
| Number of Cores | 5 |
| Conductor Material | Plain annealed stranded copper |
| Conductor Class | Class 5 flexible (fine-wire stranding) |
| Core Colours | Brown, Black, Grey, Blue, Green/Yellow (typical) |
| Insulation Material | PVC, XLPE, or TPE / Rubber |
| Sheath Material | PVC or Rubber / Elastomer |
| Sheath Colour | Black or Grey |
| Voltage Rating | 0.6/1kV (600/1000V) or 450/750V |
| Current Rating | 70-100 Amps (dependent on insulation and installation) |
| Conductor Resistance | Approximately 1.15 Ω/km at 20°C |
| Maximum Operating Temperature | 85-90°C |
| Minimum Operating Temperature | -25°C to -15°C (depending on grade) |
| Outer Diameter | 23-33 mm typical |
| Standards | BS 6004, IEC 60502, HD 22.4, IS 694:2010 |
Flex Cable 16mm 5 Core: Conductor Construction
The conductors are manufactured from plain annealed copper with fine-wire stranding (Class 5), providing exceptional flexibility compared to solid or Class 2 stranded conductors . This fine stranding allows the cable to be bent and routed easily in confined spaces, making it ideal for installation in conduit, trunking, or cable trays where space is limited.
The stranded construction offers several advantages:
Flexibility: Easy to route around corners and into termination points
Vibration Resistance: Ideal for machinery connections subject to movement
Termination: Provides excellent contact area in terminals and lugs
Handling: Easier to strip and prepare for connection
Flex Cable 16mm 5 Core: Insulation and Sheath Materials
The cable features high-quality insulation and sheath materials selected for industrial durability:
Core Insulation: Each conductor is individually insulated with materials such as PVC, XLPE (cross-linked polyethylene), or TPE/rubber, providing excellent dielectric strength and protection . The insulation is colour-coded for easy identification in three-phase installations – typically brown, black, grey for phases, blue for neutral, and green/yellow for earth .
Outer Sheath: The assembled cores are encased in a tough PVC or rubber outer sheath, offering robust protection against:
Mechanical abrasion and impact
Oils, greases, and industrial chemicals
UV exposure (for outdoor installations)
Moisture and weathering
Flame retardant properties meeting IEC 60332-1 standards
Flex Cable 16mm 5 Core: Current Ratings
The current-carrying capacity of 16mm² 5-core cable depends on insulation type and installation method. Typical ratings include:
| Installation Method | Current Rating |
|---|---|
| PVC Insulated in air | 70 Amps |
| XLPE Insulated in air | 96 Amps |
| Rubber Insulated in air | 92 Amps |
| Buried direct (XLPE) | 100 Amps |
These ratings are typical at 30°C ambient temperature and may require derating for higher temperatures or grouped installations. Reference should be made to current wiring regulations for final sizing.
Flex Cable 16mm 5 Core: Applications
This heavy-duty multicore cable is suitable for numerous industrial and commercial applications:
Three-Phase Power Distribution: Ideal for supplying three-phase power to industrial machinery, production lines, and manufacturing equipment.
Electric Vehicle Charging Stations: The 5-core configuration (3 phases + neutral + earth) is perfect for connecting EV charging stations to the mains supply, supporting fast charging capabilities .
Industrial Control Systems: Used for power and control connections in factories, process plants, and automation systems.
Building Sites and Temporary Installations: Flexible construction suits temporary power distribution for construction sites and events .
Machine Tools and Servo Drives: Provides reliable power connections for precision machinery .
Heavy Equipment Connections: Suitable for connecting large motors, pumps, compressors, and other heavy electrical equipment.
Refrigeration Installations: Can be used in refrigerating installations where flexible connections are required .
Flex Cable 16mm 5 Core: Core Identification
The five cores are typically colour-coded for easy identification in three-phase installations :
Brown: Phase 1 (L1)
Black: Phase 2 (L2)
Grey: Phase 3 (L3)
Blue: Neutral (N)
Green/Yellow: Earth (PE)
This standard colour coding ensures correct connection to distribution boards, switchgear, and equipment, reducing installation errors and enhancing safety.
Flex Cable 16mm 5 Core: Voltage Rating
The cable is available with different voltage ratings depending on the specific standard:
0.6/1kV (600/1000V): Common for XLPE and rubber insulated cables
450/750V: Typical for some flexible cable grades
The rating indicates:
Uo: Voltage to earth (phase to neutral/earth)
U: Voltage between phases
This makes the cable suitable for standard three-phase installations up to 1000V, covering most industrial and commercial applications.
Flex Cable 16mm 5 Core: Installation Considerations
Conduit and Trunking: The flexible construction makes this cable ideal for drawing into conduit systems, though the larger diameter (23-33mm) requires appropriately sized containment .
Bending Radius: The minimum bending radius should be observed to prevent damage to internal conductors. For flexible cables, this is typically:
Dynamic installations: 6-8 times the cable diameter
Fixed installations: 4-6 times the cable diameter
Termination: Due to the large conductor size, appropriate termination methods are essential. Use suitable crimped lugs, mechanical connectors, or terminals designed for 16mm² conductors.
Derating: When multiple cables are bunched together, run in thermal insulation, or exposed to high ambient temperatures, derating factors apply. Consult wiring regulations for guidance.
Temperature Range: The cable is suitable for operation from -25°C to +90°C depending on the specific grade, with different ranges for fixed and moving installations .
Flex Cable 16mm 5 Core: Quality and Compliance
This cable is manufactured to meet rigorous international standards:
BS 6004: British Standard for PVC-insulated cables
IEC 60502: Power cables with extruded insulation
HD 22.4 / EN 50525-2-21: European standards for rubber-insulated cables
IS 694:2010: Indian Standard for PVC-insulated cables
CE Marking: Indicates compliance with relevant European directives
RoHS Compliance: Free from hazardous substances
Flame Retardant: Meets IEC 60332-1-2 standards for fire performance
Flex Cable 16mm 5 Core: Availability
This cable is typically available in various formats:
Per metre: Cut to your exact requirements for smaller projects
20m lengths: For medium-sized installations
50m reels: For medium-sized installations
100m reels: Standard drum size for contractors and regular users
1000m drums: For bulk supply to large contractors
When ordering cut lengths per metre, you will receive one continuous piece of cable, not multiple sections.
Flex Cable 16mm 5 Core: Storage and Handling
Store the cable in a clean, dry environment away from direct sunlight and chemicals that could degrade the sheath. Reels should be stored upright or flat to prevent distortion. When paying out cable, ensure it is not kinked or twisted, which could damage the insulation or conductor.
When installed correctly in accordance with current wiring regulations, Flex Cable 16mm 5 Core provides a safe, reliable, and flexible solution for high-current three-phase power distribution in industrial, commercial, and EV charging applications.



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