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Product

28.5 V DC & 270 V DC Aircraft Ground Power (GPU) CablesISO 6858 / SAE AS575628.5 V DC · Up to 2500 A StartClass 6 Cu 70–240 mm² + Pilot

GP 28V DC SC 28 V DC Single-Core Aircraft Ground-Power Cable withISO 6858 / SAE AS5756 28.5 V DC (600–2500 A peak) Class 6 Cu + pilot cores GP 28V DC SC

GP 28V DC SC Aircraft Ground-Power Cable is an extra-flexible 28.5 V DC apron feeder built for turbine engine starting (up to 2,000–2,500 A peak inrush) and avionics maintenance (400–800 A continuous) on helicopters, business jets, turboprops, and military

Oil-resistant
Ozone, UV & moisture
Anti-torsion braid
Flame-retardant
Order designation
GP 28V DC SC 1×120 + 1×4 mm² (Single-Core Unit)
Outer Ø ≈
25.2 mm
Copper weight
1,190 kg/km
Total weight ≈
1,520 kg/km
Min. bend R (fixed)
151 mm
All sizes (6)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
System voltage
28.5 V DC
600/1000 V insulation rating
Peak start current
Up to 2,500 A
400–800 A continuous · 2500 A start
Main conductor
Class 6 Extra-F
70 / 95 / 120 / 150 / 185 / 240 mm²
Pilot / interlock
1 to 6 × 1.5–4
NATO / MS25018 3-pin plug sense
Apron jacket
Hi-Vis PUR / PCP
Jet-A1, Skydrol & de-icer resistant
Temp. range
-40 to +90 °C
Arctic tarmac flexibility

Typical values for this cable type, based on ISO 6858 / SAE AS5756 / MIL-DTL-3432 (28.5 V DC GPU Single-Core) — confirmed in the datasheet and quotation for your order.

Application fit

Is GP 28V DC SC right for your machine?

Engineered for mobile diesel GPU carts, fixed hangar pit/reel dispensers, and flight-line start units servicing regional turboprops, business jets, helicopters, and military tactical aircraft via

Motorised monospiral reel

Suitable

Class 6 extra-fine rope-lay stranding coils and uncoils effortlessly on manual or motorized GPU apron reels.

Self-supporting pendant & push-button drop

Suitable

Survives concrete tarmac dragging, aircraft tug tire roll-over, and repeated NATO 3-pin plug mating.

Immersion & wet locations

Suitable

Outer PUR / polychloroprene jacket resists Jet-A1/JP-8 fuel, Skydrol hydraulic fluid, and glycol de-icing fluids.

Energy chain / drag chain

With conditions

Designed for airport apron dragging and GPU reels; for lower inductive drop use symmetrical GP 28V DC SF.

GP 28V DC SF
Typical machinesAirport apron 28.5 V DC GPU cartsBusiness jet, turboprop & helicopter MROMilitary flight-line start units (NATO)Hangar floor pits & motorized reels

Construction

Layer by layer

Single-core (1×70 to 1×240 mm² + 1×1.5 to 1×6 mm² pilot, bundled as twin +/- assembly) or integral 2-core (2×70 to 2×185 mm² + 2–6×1.5 mm²

12345
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Class 6 extra-flexible rope-lay copperIEC 60228 Class 6 ultra-fine annealed bare or tinned copper main core (70–240 mm²) +IEC 60228 Class 6 / ISO 6858
290 °C EPR / TPE-E core insulationLow-temperature flexible ethylene-propylene elastomer (EPR) or TPE on main and pilotSAE AS5756 / EN 50363
3Inner elastomer cushion sheathHigh-compression inner bedding absorbing wheel roll-over loads on airport apronsISO 6858
4Anti-torsion synthetic reinforcing braidHigh-tenacity polyester/polyamide open-weave braid embedded between inner and outerGPU reeling spec
5High-visibility apron jacket (PUR / PCP)Abrasion-, Jet-A1-, Skydrol-, and glycol-resistant polyurethane (PUR) or polychloropreneSAE AS5756 / EN 50363-10-2

GP 28V DC SC Twin-Single Assembly (2 × [1×95–240 + 1×2.5/4 mm²])

Two ultra-flexible single-core cables (Positive + Pilot, Negative) bound or figure-8 joined for 3-pin NATO

GP 28V DC SC Composite Round (2×70–2×150 + 2–6×1.5 mm²)

Round composite 28.5 V DC cable enclosing +/- main cores and voltage-sense/interlock cores in one jacket.

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on ISO 6858 / SAE AS5756 / MIL-DTL-3432 (28.5 V DC GPU Single-Core). Values for your order are confirmed in the datasheet and quotation.

Electrical

Nominal aircraft bus voltage
28.5 V DC (cable insulation rated 0.6/1 kV)
Continuous / start peak current
400–800 A continuous · 1,500–2,500 A
Routine dielectric test voltage
3,000 V AC for 5 minutes
Max. conductor operating temp.
+90 °C continuous · +250 °C short-circuit

Thermal

Apron operating temp. range
-40 °C to +90 °C (dynamic reeling down to
Storage temperature
-50 °C to +90 °C

Mechanical

Min. bending radius
4 × D static · 6 × D dynamic reeling &
Crush & abrasion resistance
Withstands ground-support tug &

Resistance

Aviation fluid resistance
Jet-A1 / JP-8 kerosene, Skydrol LD-4
Weather, UV & flame
UV sunlight stabilized · IEC 60332-1-2

Reference standards

Primary specification
ISO 6858 · SAE AS5756 · MIL-DTL-3432 · VDE
Plug compatibility
3-pin 28 V DC NATO / AN2551 / MS25018

Identification

Core identification
Positive (+) Red · Negative (-) Black ·
Outer sheath colour
High-Visibility Aviation Yellow (RAL 1021)

Sizes

6 standard configurations (GP 28V DC SC)

Nominal dimensions, copper weights, DC resistance and current ratings for GP 28V DC SC per ISO 6858 / SAE AS5756 / MIL-DTL-3432 (28.5 V DC GPU Single-Core).

Dimensions & weights
Order designationCores × SizeMain cross-sectionOuter Ø ≈
mm		Copper
kg/km		Weight ≈
kg/km		Min. bend R
fixed mm		Enquiry
Standard GP 28V DC SC configurations
GP 28V DC SC 1×95 + 1×4 mm² (Single-Core Unit)1×95 + 1×4.0 mm²95.0 mm²22.89501,240137
GP 28V DC SC 1×120 + 1×4 mm² (Single-Core Unit)1×120 + 1×4.0 mm²120.0 mm²25.21,1901,520151
GP 28V DC SC 1×150 + 1×6 mm² (Single-Core Unit)1×150 + 1×6.0 mm²150.0 mm²27.61,4951,880166
GP 28V DC SC 1×185 + 1×6 mm² (Single-Core Unit)1×185 + 1×6.0 mm²185.0 mm²30.41,8352,290182
GP 28V DC SC 2×95 + 4×1.5 mm² (Round Composite)2×95 + 4×1.5 mm²95.0 mm²37.51,8802,690225
GP 28V DC SC 2×120 + 4×1.5 mm² (Round Composite)2×120 + 4×1.5 mm²120.0 mm²41.22,3603,290247
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Outer diameters and weights are nominal factory values subject to ±5 % manufacturing tolerance per ISO 6858 / SAE AS5756 / MIL-DTL-3432 (28.5 V DC GPU Single-Core).

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
3.0 kV AC dielectric & insulation resistance3,000 V AC for 5 min between main core, pilot cores & water bath100 % of reels
Class 6 DC conductor resistance @ 20 °CIEC 60228 Class 6 ultra-low resistance for minimal 28 V DC drop100 % of reels
Sample tests
-40 °C cold flexing & apron abrasion testDIN EN 50363-10-2 PUR abrasion & cold impact passPer production batch
Jet-A1, Skydrol & glycol de-icer immersionSAE AS5756 fluid swell & tensile retention passType approval

Inspection certificate

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

Product approvals

ISO 6858 / SAE AS5756IEC 60228 Class 6CE / RoHS

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX GP 28V DC SC AIRCRAFT GROUND
Delivery form
Non-returnable timber drums or heavy export
Standard drum lengths
250 m · 500 m · 1000 m · custom cut lengths
MOQ
100 m (stock variants) · 500 m (custom)
Lead time
2–4 weeks ex-works
Incoterms
EXW, FOB, CIF, DAP

Technical documents

Downloads

PDFGP 28V DC SC 28 V DC Single-Core Aircraft Ground-Power Cable with – technical datasheet6 sizes · construction, technical data, approvalsXLSXGP 28V DC SC spec data (Excel)All 6 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.

Why do 28.5 V DC aircraft GPU cables require such large 95 mm² to 240 mm² copper cross-sections?
Turboprop and helicopter turbine starters draw 1,200 A to 2,500 A peak inrush current at only 28.5 V DC. Even a 2 mΩ loop resistance drops 4 V at 2,000 A, which can cause avionics under-voltage trip-outs. Using 95–240 mm² Class 6 copper keeps voltage drop within ISO 6858 limits.
What is the role of the small 1.5–6.0 mm² pilot core inside the GP 28V DC SC cable?
Standard 3-pin 28 V DC aircraft plugs (AN2551 / NATO / MS25018) have two large main power blades (+ and -) and a shorter 3rd interlock/pilot pin. The pilot core signals the GPU contactor to close only after the plug is fully seated and provides remote voltage-drop sensing at the aircraft socket.
When do operators prefer Twin Single-Core (GP 28V DC SC) over Symmetrical Multi-Core (GP 28V DC SF)?
Single-core 1×120 mm² to 1×240 mm² cables banded in pairs offer maximum heat dissipation at 600–800 A continuous current and allow easy field replacement of a single damaged pole. Symmetrical multi-core (GP 28V DC SF, e.g., 4×50 mm²) is preferred when a single lighter, rounder reel cable is desired.
How does the outer PUR/PCP jacket survive concrete runway abrasion and Skydrol spills?
Airport concrete aprons act like coarse sandpaper while exposing cables to Jet-A1 fuel, phosphate-ester Skydrol hydraulic fluid, and hot glycol de-icing fluid. Our cross-linked polyurethane (PUR) or heavy polychloroprene jacket with internal anti-torsion braid prevents jacket tearing and chemical swelling. Each production drum undergoes

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GP 28V DC SC 28 V DC Single-Core Aircraft Ground-Power Cable with

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