Type 66 Cable 3.8/6.6kV Flexible Copper Screened Mining Cable
Mining power cables work in a difficult environment: movement, pulling tension, abrasion, oil exposure, UV, ozone and strict safety requirements all need to be considered before purchase. This Type 66 Cable is designed for 3.8/6.6kV mining power systems where reliable power transmission, mechanical protection and compliance with SANS 1520-2 are important.
Type 66 Cable for Mining Power and Movable Equipment
This flexible copper screened mining cable is suitable for electrically driven machines, movable electric apparatus in hazardous areas, section feeders, open cast mining equipment, medium-sized draglines, shovels and drills. It can also be used in other industrial applications where a robust 3.8/6.6kV cable is required.
Key Benefits
Flexible Tinned Copper Conductors for Stable Power Supply
- Flexible class 5 tinned annealed copper conductors support repeated movement and practical field handling.
- Power cores are designed with semi-conducting rubber screen for medium-voltage mining power applications.
- Tinned copper construction helps improve corrosion resistance in harsh operating conditions.
Screened Power Cores and Pilot Core Design
- Three tinned copper or nylon braided screened power cores are used for reliable electrical performance.
- Three unscreened pilot cores are laid in the interstices around a semi-conductive filler centre.
- For Type 66 ECC versions, one pilot core can be replaced with a tinned ECC conductor for additional earthing requirements.
Heavy-Duty Sheath for Mining Environments
- Outer sheath options include polychloroprene thermosetting compound or extra-heavy-duty TPU jacket.
- The sheath is designed for abrasion resistance, tear resistance and flame retardant performance.
- UV, sunlight, ozone and oil resistance help support long service life in open cast and underground mining conditions.
Built for Safer Handling and Site Visibility
- Available with black sheath or transparent sheath with orange and silver reflective tape under the TPU jacket.
- Reflective tape option improves visibility around mobile machinery and working areas.
- Minimum bending radius and maximum recommended tension data help EPC buyers design safer cable routes.
Technical Specifications
| Product name | Type 66 Cable / Type 66 ECC Cable |
| Voltage rating | 3.8/6.6kV |
| Standard | SANS 1520-2 |
| Applicable references | SANS 1411-1, SANS 1411-3, ICEA S-75-381 |
| Cable type | Flexible copper screened mining cable |
| Conductors | Flexible class 5 tinned annealed copper conductors |
| Insulation | Ethylene propylene thermosetting compound, type RD3 |
| Insulation screen | Tinned copper wires or synthetic fibre braid |
| Cable assembly | Three screened power cores and three pilot cores laid around a semi-conductive filler centre |
| Internal sheath | Polychloroprene thermosetting compound type RS6 |
| Outer sheath | Polychloroprene thermosetting compound or extra-heavy-duty TPU jacket |
| Sheath color | Black, or transparent with orange and silver reflective tape under TPU jacket |
| Temperature range | Minimum ambient temperature -25°C, maximum conductor operating temperature +90°C |
| Short circuit conductor temperature | Up to +250°C |
| Voltage test | 8kV |
| Flame retardant | IEC 60332-1-2 |
| Oil resistance | IEC 60811 |
| Standard packing | 500m on drums; other packing and delivery options available on request |
Available Conductor Sizes
| Power core sizes | 25mm2, 35mm2, 50mm2, 70mm2, 95mm2, 120mm2, 150mm2, 185mm2, 240mm2 |
| Pilot core sizes | 10mm2, 16mm2, 25mm2 depending on power core size |
| Approximate cable diameter | 50.1mm to 82.5mm depending on size |
| Approximate cable mass | 3.8kg/m to 14.5kg/m depending on size and Type 66 or Type 66 ECC construction |
| Minimum bending radius | 430mm to 740mm depending on cable size |
| Maximum recommended tension | 1.1kN to 10.8kN depending on cable size |
Recommended Applications
- Electrically driven mining machines
- Movable electric apparatus in hazardous areas
- Section feeders and medium-voltage mining power distribution
- Open cast mining equipment, draglines, shovels and drills
- Industrial applications requiring a flexible 3.8/6.6kV screened cable
Why EPC Buyers Choose This Type 66 Cable
For mining EPC projects, cable selection is not only about voltage rating. Buyers also need to check conductor construction, screen design, pilot core arrangement, bending radius, tensile load, sheath durability and compliance documents. This Type 66 Cable gives project teams a clear technical basis for specifying a 3.8/6.6kV mining cable that can handle daily movement and demanding site conditions.
The Type 66 ECC option is suitable when the project requires an additional earth continuity conductor. For sites where visibility and abrasion resistance are important, the TPU jacket with orange and silver reflective tape provides a practical option for safer cable identification around mobile equipment.
For related products, view our mining cables, industrial cables categories.