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.