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Mining trailing & reeling cablesSANS 1520-2 Type 663.8/6.6 kV · 25–240 mm²Type 66 & 66-ECC

SANS 1520-2 Type 66 / 66-ECC 3.8/6.6 kV Mining CableMedium-voltage 3.8/6.6 kV screened reeling, dragline & section-feeder cable (25–240 mm²)

South African SANS 1520-2 Type 66 and Type 66-ECC medium-voltage screened reeling and trailing cable (3.8/6.6 kV, 25–240 mm²) with three braid-screened EPR power cores, EPM pilots (or tinned ECC) and twin CR sheaths.

EMC screen
Flame-retardant
Oil-resistant
Water-resistant
Order designation
Type 66 / 66-ECC · 3 × 70 mm²
Power size
70 mm²
ECC size (-ECC)
35 mm²
Nominal OD
59.8 mm
Mass (Type 66)
6,200 kg/km
Check against my drumAll sizes (9)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Rated voltage
3.8/6.6 kV
SANS 1520-2 MV mining
Core arrangement
3P + 3P / ECC
Type 66 or 66-ECC
Size range
25–240 mm²
9 standard sizes
Ampacity (30 °C)
105–400 A
Laid out straight
Operating temp.
−25 to +90 °C
EPR / twin CR rubber
Min. bend radius
6 × OD
Reeling & trailing duty

Typical values for this cable type, based on SANS 1520-2 · SANS 1411-1 & -3 — confirmed in the datasheet and quotation for your order.

Application fit

Is SANS Type 66 / 66-ECC (3.8/6.6 kV) right for your machine?

Designed for 3.8/6.6 kV open-cast and underground mining machinery—including walking draglines, electric rope shovels, rotary blast-hole drills, mobile stacker-reclaimers and hazardous-area section feeders—requiring SANS 1520-2 screened power cores and selectable 3-pilot (Type 66) or high-earth-fault ECC (Type 66-ECC) protection.

Trailing & towing

Suitable

Primary 3.8/6.6 kV trailing and section-feeder cable for open-cast shovels, medium-sized draglines, drills and movable substations.

Motorised monospiral reel

Suitable

Rated for motorized cable-reel operation on mobile mining machines when drum barrel diameter respects 6 × OD.

Cylindrical / multi-layer drum

Suitable

16-string open nylon reinforcement braid vulcanized between inner and outer CR sheaths resists reeling torsion and pull (1.1 to 10.8 kN).

Immersion & wet locations

Suitable

UV-, sunlight- and oil-resistant twin polychloroprene (CR) sheaths withstand flooded pit benches and harsh solar exposure.

Free-hanging vertical run

Not suitable

Flexible unarmoured trailing construction — do not suspend in deep vertical mine shafts without support.

Use BS 6708 Type 20/21 Armoured
Typical machinesOpen-cast 3.8/6.6 kV shovels & draglinesRotary blast-hole drillsHazardous-area 3.8/6.6 kV section feedersMobile in-pit crushers & conveyorsStacker-reclaimers & port reelsMobile Pit Substations / skids

Construction

Layer by layer

Three Class 5 tinned copper power conductors insulated with 3.8/6.6 kV EPR (with strippable semi-conducting core screen) are individually screened with a tinned-copper/nylon braid and laid up with three EPM-insulated pilot cores in Type 66 (or two EPM pilots plus one bare tinned copper earth-continuity conductor in Type 66-ECC), bedded in an inner CR sheath, reinforced by a 16-string open nylon braid and oversheathed in black CR rubber.

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Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Power conductors (3)Class 5 flexible stranded tinned annealed copper (25–240 mm²)SANS 1411-1
2Power core insulationEthylene propylene rubber (EPR) thermosetting compound (3.8/6.6 kV grade)SANS 1411-3 · SANS 1520-2
3Individual phase screens (3)Composite tinned copper (0.31 mm wires) and nylon textile braid over each power core1.6–4.1 kA 1s screen fault
4Pilots (3) or 2 Pilots + ECC (66-ECC)Three EPM-insulated pilot cores (10 to 25 mm²), or one pilot replaced by a tinned copper ECC (16 to 120 mm²)Up to 17 kA 1s earth fault
5Inner sheathPolychloroprene (CR) thermosetting elastomer inner sheathSANS 1411-3
6Reinforcement braidOpen-weave nylon reinforcement braid (minimum 16 strings)SANS 1520-2
7Outer sheathBlack UV-, sunlight- and oil-resistant polychloroprene (CR) rubber outer sheathSANS 1520-2 · SANS 1411-3

SANS Type 66 (3 Insulated EPM Pilot Cores)

3 individually screened 3.8/6.6 kV power cores + 3 EPM-insulated interstitial pilot cores (10 to 25 mm²)

SANS Type 66-ECC (2 Pilots + 1 Tinned Copper ECC)

Replaces one pilot core with a 16 to 120 mm² tinned copper earth-continuity conductor to raise 1s earth-fault capacity to 3.6 to 17.0 kA

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on SANS 1520-2 · SANS 1411-1 & -3. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage U0/U
3.8/6.6 kV AC (SANS 1520-2 Type 66 and Type 66-ECC)
Current rating (30 °C)
105–400 A at 30 °C ambient air and 90 °C conductor temperature
Phase screening & stress control
EPR core insulation + composite tinned copper / nylon braid screen (28 to 50 mm²) on each phase core
Pilot & ECC variants
Type 66: 3 × EPM-insulated pilots · Type 66-ECC: 2 × pilots + 1 × bare tinned copper ECC (16 to 120 mm²)

Thermal

Operating temperature range
−25 °C to +90 °C
Short-circuit & earth-fault rating (1 s)
Phase S/C: 3.1–29.0 kA (1 s) · Earth fault: 1.6–4.1 kA (Type 66 screens) or 3.6–17.0 kA (Type 66-ECC)

Mechanical

Min. bending radius
6 × OD (reeling, dragline trailing and section-feeder service)
Max. tensile load
1.1 to 10.8 kN
Twin CR sheaths & reinforcement
CR polychloroprene inner sheath + 16-string open nylon braid + black CR polychloroprene outer sheath

Resistance

UV, sunlight & oil resistance
UV resistant, sunlight resistant, oil resistant and flame retardant per SANS 1520-2 / SANS 1411-3
Open-cast & underground abrasion
Heavy-duty polychloroprene (CR) twin sheath resists pit-bench rock drag, shovel reeling and moisture

Reference standards

Construction standard
SANS 1520-2 · SANS 1411-1 · SANS 1411-3
Conductor class
Class 5 flexible stranded tinned annealed copper per SANS 1411-1

Identification

Outer sheath colour
Black polychloroprene (CR)
Type designation
SANS 1520-2 Type 66 (3 pilots) & Type 66-ECC (2 pilots + 1 ECC), 3.8/6.6 kV

Sizes

9 standard sizes (25–240 mm²) · SANS 1520-2 Type 66 & Type 66-ECC (3.8/6.6 kV)

Compare Type 66 (3 pilots) and Type 66-ECC (2 pilots + ECC) dimensions, weights, resistance, 30 °C ampacity and 1s fault ratings.

Dimensions · Type 66 & 66-ECC
Designation
Power cores		Power
mm²		Power Ø
mm		Screen
mm²		Pilot
mm²		ECC size
mm² (-ECC)		Max. tension
kN		Nominal OD
mm		Mass (Std)
kg/100m		Mass (Type 66)
kg/km		Mass (66-ECC)
kg/km		Enquiry
Type 66 / 66-ECC · 3 × 25 mm²256.82810161.150.13803,8003,900
Type 66 / 66-ECC · 3 × 35 mm²358.52910251.651.74204,2004,400
Type 66 / 66-ECC · 3 × 50 mm²5010.33210252.355.35105,1005,500
Type 66 / 66-ECC · 3 × 70 mm²7011.93516353.259.86206,2006,400
Type 66 / 66-ECC · 3 × 95 mm²9513.53916504.364.67407,4007,600
Type 66 / 66-ECC · 3 × 120 mm²12015.54116705.468.88708,7008,900
Type 66 / 66-ECC · 3 × 150 mm²15017.34425956.873.11,02010,20010,500
Type 66 / 66-ECC · 3 × 185 mm²18520.24725958.377.81,17011,70011,900
Type 66 / 66-ECC · 3 × 240 mm²24022.9502512010.883.11,41014,10014,500
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Type 66 incorporates 3 EPM-insulated pilot cores; Type 66-ECC replaces one pilot core with a tinned copper earth-continuity conductor (ECC) of the size shown.
  • Both variants share the same nominal overall diameter (OD) and maximum tensile load.

Reel check

Will it fit your machine?

A first screen using datasheet values. Engineering confirms drum geometry, acceleration and tension with your quotation.

Check results

Enter your drum core diameterMinimum for this size is about 718 mm
Minimum bending radius
359 mm
Min. drum core diameter
≈ 718 mm
Cable weight on drum
620.0 kg
Outer diameter
59.8 mm
Indicative only: based on the datasheet outer diameter and 6 × OD bending radius. Current derating for wound layers per DIN VDE 0298-4 is assessed separately.

Quality & approvals

Testing & inspection

Routine tests on every production length, sample and type tests per batch — documented on an EN 10204 3.1 inspection certificate.

  1. ConductorClass 5 stranding
  2. Spark test100 % in-line
  3. Lay-upCores, earth, fillers
  4. SheathingInner, braid / screen, outer
  5. Electrical testsAC voltage, resistance
  6. DimensionsOD, wall thickness
  7. Inspection documents & dispatchDrum & dispatch
Testing & inspectionTest value / referenceFrequency
Routine tests
Medium-voltage AC withstand & partial-discharge testRoutine AC high-voltage and partial-discharge test on 3.8/6.6 kV EPR cores per SANS 1520-2Every shipping drum
Conductor, screen & ECC DC resistance testVerified against maximum conductor resistance and minimum screen / ECC resistance limitsEvery shipping drum
Sample tests
CR sheath UV, oil, flame & mechanical testInner and outer polychloroprene sheaths tested to SANS 1411-3 and SANS 1520-2Production batch

Inspection certificate

Issued with every drum, listing the routine test results for that length.

Product approvals

SANS 1520-2 Type 66CE · LVDRoHS · REACH

Company certificates

ISO 9001ISO 14001ISO 45001VDE marks approvalUL / cULCE · LVD / EMC

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX · SANS 1520-2 · TYPE 66 / 66-ECC · 3.8/6.6kV · 3 x [mm²] · EPR/CR
Delivery form
Export seaworthy wooden or steel drums matched to 6 × OD minimum bend radius
Variants
Available in standard Type 66 (3 pilots) or Type 66-ECC (2 pilots + 1 tinned copper ECC)
Certificate
EN 10204 3.1 factory routine test certificate with every drum
Quote response
Engineering specification and quote within 2 business hours

Technical documents

Downloads

PDFSANS 1520-2 Type 66 / 66-ECC 3.8/6.6 kV Mining Cable – technical datasheet9 sizes · construction, technical data, approvalsXLSXSANS Type 66 / 66-ECC (3.8/6.6 kV) spec data (Excel)All 9 sizes with dimensions and data, for your BOM or quotation
Revision
2026-10-20
Updated
2026-10-20

FAQ

Questions engineers ask first

Not covered here? Send your drawing — an engineer replies within 2 business hours.

When should I specify Type 66-ECC instead of standard Type 66?
Specify Type 66 (3 insulated EPM pilot cores) on restricted-earth-fault systems where the three individual copper/nylon phase screens (1.6 to 4.1 kA for 1 s) exceed the maximum prospective earth-fault current. Specify Type 66-ECC (which replaces one pilot core with a 16 to 120 mm² tinned copper earth-continuity conductor) when substation fault levels require 3.6 to 17.0 kA (1 s) earth-fault capacity or lower earth-loop impedance.
Does Type 66-ECC have the same overall diameter as standard Type 66?
Yes. Because the bare tinned copper ECC conductor occupies the same interstice as the third EPM-insulated pilot core, Type 66 and Type 66-ECC share identical nominal overall diameters (50.1 to 83.1 mm) and fit the same couplers and cable glands.
Is SANS Type 66 / 66-ECC suitable for open-cast dragline and shovel reeling?
Yes. Its Class 5 tinned copper conductors, composite nylon/tinned-copper core screens, 16-string open nylon anti-torsion braid and UV/oil-resistant twin CR sheaths are engineered for open-cast reeling, trailing and section-feeder service at a 6 × OD minimum bend radius.
Where does Type 66 (3.8/6.6 kV) sit within the SANS 1520-2 medium-voltage family?
SANS 1520-2 covers five medium-voltage mining grades: Type 63 (1.9/3.3 kV), Type 66 / 66-ECC (3.8/6.6 kV), Type 611 / 611-ECC (6.35/11 kV), Type 622 / 622-ECC (12.7/22 kV) and Type 633 / 633-ECC (19/33 kV).

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03Message for our engineers

SANS Type 66 / 66-ECC 3.8/6.6 kV Mining Trailing Cable

Selected sizes:


Reel & motion:
- Reel type: 
- Drum core diameter (mm): 
- Cable length on drum (m): 
- Travel speed (m/min): 
- Max. acceleration: 
- Cycles per hour: 
- Length and quantity: 
- Ambient temperature: 
- Exposure (outdoor, water, oil, abrasion): 
- Destination country: 
- Equipment and operating conditions:
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