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Product

SAE J1128 North American Automotive Primary Wires60 V DC / 25 V ACSAE J1128 Regular-Wall XLPE-40 to +125 °C (Class C)

GXL Automotive Cross-Linked Wire60 V DC / 25 V AC SAE J1128 general-purpose regular-wall XLPE automotive wire (-40 to +125

Type GXL (General Purpose Cross-Linked) is a regular-wall (0.58 mm on 20–14 AWG) 60 V DC (25 V AC) SAE J1128 primary wire insulated with cross-linked polyethylene (XLPE) for -40 °C to +125 °C service. It provides higher cut-through, pinch and chafe margin than

+125 °C Class C XLPE
Heavy-Duty Engine Bay
SAE J1128 / Ford / Chrysler
Order designation
GXL 14 AWG (2.0 mm²)
Max. OD
3.35 mm
Copper mass
17.8 kg/km
Total mass ≈
23.2 kg/km
Min. bend R
16.8 mm
All sizes (12)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Rated voltage
60 V DC / 25 V A
SAE J1128 primary harness
Thermal class
-40 to +125 °C
ISO 6722-1 Class C (3000 h)
Gauge range
20 to 8 AWG
0.5 to 8.0 mm² metric equivalent
Wall profile
Regular (0.58mm)
0.58 mm XLPE wall (20–14 AWG)
Conductor
Concentric Cu
7/19/37-strand ASTM B3 copper
Min. bend radius
5 × wire OD
Heavy truck & off-highway looms

Typical values for this cable type, based on SAE J1128 / ISO 6722-1 Class C — confirmed in the datasheet and quotation for your order.

Application fit

Is GXL right for your machine?

Specified for Class 8 heavy trucks, tractors, diesel engine harnesses, off-highway excavators, buses and industrial engine generator sets where vibration and abrasion require a thicker 0.58 mm XLPE wall.

Fixed installation

Suitable

Routes along diesel engine blocks, frame rails, transmission housings and cab bulkheads.

Motor stator, traction & converter leads

Suitable

Thermoset XLPE insulation resists solder iron contact and short-circuit heating up to +250 °C.

Switchgear & control cabinet wiring

Suitable

Matches standard GPT outer diameters while upgrading thermal class from +85 °C to +125 °C.

Motorised monospiral reel

Not suitable

Single-core automotive primary wire is for fixed harness looms only.

S07HXHX flexible LSZH
Typical machinesHeavy-duty trucks & busesConstruction & earthmoving plantAgricultural combines & tractorsDiesel engines & gensetsSpecialty emergency vehicles

Construction

Layer by layer

Symmetrical concentric stranded ASTM B3 bare copper conductor + 0.58 mm regular-wall cross-linked polyethylene (XLPE) insulation + smooth colour-coded outer surface.

123
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Concentric stranded copperSymmetrical 7-, 19- or 37-strand annealed bare copper per ASTM B3 / SAE J1128ASTM B3
2Regular-wall cross-linked XLPEElectron-beam or silane cross-linked polyolefin (XLPE) compound rated -40 °C to +125 °C (0.58 mm wall on 20–14 AWG)SAE J1128
3Smooth colour-coded outer skinIntegral abrasion-resistant XLPE surface finish with optional tracer stripeSAE J1128

SAE J1128 GXL Bare Copper

Standard concentric bare copper conductor with -40 to +125 °C regular-wall XLPE insulation.

GXL Tinned Copper (Marine / HD)

ASTM B33 tinned copper strands with regular-wall XLPE for corrosive salt-spray and marine engine bays.

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on SAE J1128 / ISO 6722-1 Class C. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage
≤60 V DC / ≤25 V AC
Wet dielectric test
1.0 kV AC rms for 1 minute
In-line spark test
3.0 kV AC rms

Thermal

Continuous operating temp.
-40 °C to +125 °C (3000 h Class C)
Short-term overload temp.
+150 °C (240 h) · +250 °C short-circuit (5 s)
Cold bend test
-40 °C for 4 hours without cracking

Mechanical

Nom. wall thickness (20–14 AWG)
0.58 mm (0.023 in)
Nom. wall thickness (12 / 10 / 8 AWG)
0.66 mm (12 AWG) · 0.79 mm (10 AWG) · 0.94 mm (8 AWG)
Pinch & scrape abrasion
45 % thicker XLPE wall than TXL for high pinch resistance

Resistance

Flame propagation
Self-extinguishing within 70 s per SAE J1128
Fluid resistance
Hot engine oil, diesel, gasoline, hydraulic fluid, DEF/AdBlue & coolant

Reference standards

Governing standard
SAE J1128 Type GXL & ISO 6722-1 Class C
OEM specifications
Ford ESB-M1L85-B & Chrysler MS-8900

Identification

Colour coding
12 standard base colours + longitudinal/spiral stripes
Compatibility
Drop-in dimensional upgrade for regular-wall GPT terminals and seals

Sizes

12 standard sizes (GXL)

Nominal dimensions, wall thickness, copper mass and electrical parameters for GXL per SAE J1128 / ISO 6722-1 Class C.

Dimensions & masses
DesignationAWG (Metric mm²)Strands / Wall mmMax. OD
mm		Copper
kg/km		Total mass ≈
kg/km		Min. bend R
mm		Enquiry
GXL size range
GXL 20 AWG (0.5 mm²)20 AWG (0.5 mm²)7/28 · 0.58 mm2.404.98.212.0
GXL 18 AWG (0.8 mm²)18 AWG (0.8 mm²)19/30 · 0.58 mm2.658.912.813.2
GXL 16 AWG (1.0 mm²)16 AWG (1.0 mm²)19/29 · 0.58 mm2.9011.215.614.5
GXL 14 AWG (2.0 mm²)14 AWG (2.0 mm²)19/27 · 0.58 mm3.3517.823.216.8
GXL 12 AWG (3.0 mm²)12 AWG (3.0 mm²)19/25 · 0.66 mm4.0528.235.820.2
GXL 10 AWG (5.0 mm²)10 AWG (5.0 mm²)19/23 · 0.79 mm4.9545.055.624.8
GXL 8 AWG (8.0 mm²)8 AWG (8.0 mm²)19/21 · 0.94 mm6.1071.586.830.5
GXL 18 AWG (16/30)18 AWG (16/30)16/30 · 0.58 mm2.607.611.513.0
GXL 16 AWG (26/30)16 AWG (26/30)26/30 · 0.58 mm2.9512.116.614.8
GXL 14 AWG (41/30)14 AWG (41/30)41/30 · 0.58 mm3.4019.124.617.0
GXL 12 AWG (37/28)12 AWG (37/28)37/28 · 0.66 mm4.1028.836.520.5
GXL 10 AWG (37/26)10 AWG (37/26)37/26 · 0.79 mm5.0045.856.525.0
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Dimensions and maximum overall diameters conform to SAE J1128 / ISO 6722-1 Class C.

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 in-line AC spark test & DC resistanceZero insulation faults; DC resistance per SAE J1128100 % of spools
Sample tests
SAE J1128 pinch, sandpaper abrasion & cold bendExceeds regular-wall XLPE pinch and abrasion thresholdsEvery lot
3000-hour +125 °C thermal ageing & hot oil/fuel immersionRetains full dielectric integrity after 3000 h at +125 °CType qualification

Inspection certificate

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

Product approvals

SAE J1128 Type GXLISO 6722-1 Class C (+125 °C)Ford ESB-M1L85-BChrysler MS-8900RoHS 3 Compliant

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX SAE J1128 GXL 16 AWG (1.0mm2) 60VDC +125C XLPE [lot/spool]
Delivery form
Non-returnable plastic spools, barrel packs or wooden drums
Standard spool lengths
500 m · 1000 m · 2000 m spools (or barrel packs)
MOQ
500 m (stock colours) · 2000 m (striped/custom)
Lead time
2–3 weeks ex-works
Incoterms
EXW, FOB, CIF, DAP

Technical documents

Downloads

PDFGXL Automotive Cross-Linked Wire – technical datasheet12 sizes · construction, technical data, approvalsXLSXGXL spec data (Excel)All 12 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 GXL be specified instead of TXL?
Specify GXL in heavy-duty trucks, construction machinery, agricultural equipment and exposed chassis harnesses where higher vibration and mechanical chafe demand a 0.58 mm nominal wall (45 % thicker than TXL's 0.40 mm wall), or when retrofitting existing regular-wall GPT terminals and cable seals.
Can GXL use the same crimp terminals and connector cavity seals as GPT?
Yes. Because GXL and GPT share the exact same 0.58 mm nominal wall thickness on 20–14 AWG sizes (and identical wall thicknesses on 12–8 AWG), GXL serves as a direct +125 °C cross-linked drop-in replacement for +85 °C GPT without changing tooling.
Does GXL melt if a circuit experiences a brief overload or soldering heat?
No. Unlike thermoplastic GPT or TWP which soften and flow above 105 °C, the electron-beam cross-linked molecular structure of GXL converts the polyethylene into a thermoset elastomer that resists melting up to +250 °C.
When is heavy-wall SXL preferred over GXL?
Select SXL (0.74 mm nominal wall on 20 AWG) for unloomed sensor leads, anti-lock brake (ABS) wheel-speed jumpers and heavy truck frame runs requiring maximum cut-through and stone-chip protection.

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GXL Automotive Cross-Linked Wire

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