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Product

Heavy-duty rubber cables (NSSHÖU)NF M 82-376 / 82-3771 kV · 3 kV · 6 kVEPR H · Braid B · Sheath U

1-CHBU / 3-CHBU / 6-CHBU CHBU Mining Equipment InterconnectionFrench NF M 82-376/377 1 kV, 3 kV & 6 kV braided-armour mining rubber cable

Heavy-duty French mining equipment interconnection cable to NF M 82-376 and NF M 82-377 across 1-CHBU (0.6/1 kV), 3-CHBU (1.8/3 kV) and 6-CHBU (3.6/6 kV) with Class 5 copper ('C'), EPR insulation ('H'), Cu/steel armour braid ('B') and PCP sheath ('U').

EMC screen
Oil-resistant
Flame-retardant
Outdoor & humid
Order designation
3-CHBU 3×50+1×25 (1.8/3 kV)
Outer Ø min
40.3 mm
Outer Ø max
43.8 mm
Weight ≈
3,510 kg/km
Min. bend R
263 mm
Check against my drumAll sizes (15)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Voltage classes
1 / 3 / 6 kV
0.6/1 kV · 1.8/3 kV · 3.6/6 kV U0/U
AC test voltage
3 / 6.5 / 11 kV
50 Hz, 5 min per voltage class
Conductor temp.
+90 °C max.
+250 °C short-circuit (5 s)
Ambient temp.
−25…+80 °C
Flexing (−40…+80 °C fixed)
Bending radius
6–10 × OD
6 × OD fixed · 10 × OD flexing
Size range
2.5–150 mm²
3 & 4 cores + pilots across 1–6 kV

Typical values for this cable type, based on NF M 82-376 / NF M 82-377 — confirmed in the datasheet and quotation for your order.

Application fit

Is 1-CHBU / 3-CHBU / 6-CHBU right for your machine?

The CHBU series connects flameproof gate-end boxes, mobile transformers, shearers, roadheaders and pumping skids in underground mines where a pliable metallic braid armour ('B') is required for both mechanical crush protection and earth-fault screening.

Trailing & towing

Suitable

Interconnection between underground mining gate-end switchgear, cutter-loaders, conveyors and mobile substations.

Fixed installation

Suitable

Gallery wall hooks, shaft feeder branches and onboard machine power harnesses at 1 kV, 3 kV or 6 kV.

Immersion & wet locations

Suitable

Heavy-duty polychloroprene/elastomer outer jacket ('U') resists mine water, mud and hydraulic oil emulsions.

Motorised monospiral reel

Not suitable

Metallic braid armour is designed for armoured equipment interconnection, not high-speed crane reeling.

Use (N)TSCGEWÖU Reeling
Typical machinesUnderground coal, potash & uranium minesLongwall shearers & roadheader feedersFlameproof transformer & gate-end linksTunnel boring & subterranean civil worksHeavy mineral processing & slurry skids

Construction

Layer by layer

Shown: 3-CHBU 3×50+1×25 (1.8/3 kV) — Class 5 tinned copper conductors, high-grade EPR insulation ('H'), elastomeric inner bedding, tinned-copper/galvanised-steel armour braid ('B') and extra-heavy-duty polychloroprene outer sheath ('U').

12345
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Flexible copper conductor (C)Fine-stranded annealed bare or tinned copper wire (IEC 60228 / NF C 32-013 Class 5)IEC 60228 Class 5
2High-grade EPR insulation (H)Cross-linked high-dielectric ethylene-propylene elastomer scaled for 0.6/1 kV, 1.8/3 kV or 3.6/6 kV (with semiconductive screens on MV)NF M 82-376 / 82-377
3Elastomeric inner beddingExtruded rubber inner sheath cushioning the laid-up cores beneath the metallic braidImpact absorption & roundness
4Metallic armour screen braid (B)Mixed tinned-copper and galvanised-steel wire braid ('Blindage') combining mechanical crush protection with fault-current conductivityNF M 82-376 / 82-377
5Extra-heavy outer sheath (U)Cross-linked heavy-duty polychloroprene (PCP) or polyurethane-elastomer compound Type U, tear-, oil- and flame-resistantNF C 32-070 C2 / IEC 60332-1-2

1-CHBU (0.6/1 kV · NF M 82-376)

Low-voltage 1 kV class armoured mining interconnection cable (4×2.5 to 3×120+1×70 mm²)

3-CHBU (1.8/3 kV · NF M 82-377)

Medium-voltage 3 kV class armoured mining equipment cable (3×16+1×16 to 3×150+1×70 mm²)

6-CHBU (3.6/6 kV · NF M 82-377)

Medium-voltage 6 kV class armoured mining feeder & transformer cable (3×16+1×16 to 3×150+1×70 mm²)

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on NF M 82-376 / NF M 82-377. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage U0/U
1-CHBU: 0.6/1 kV · 3-CHBU: 1.8/3 kV · 6-CHBU: 3.6/6 kV
Max. system voltage Um
1-CHBU: 1.2 kV · 3-CHBU: 3.6 kV · 6-CHBU: 7.2 kV
AC test voltage (5 min)
1-CHBU: 3.0 kV · 3-CHBU: 6.5 kV · 6-CHBU: 11.0 kV AC
Conductor stranding
IEC 60228 / NF C 32-013 Class 5 flexible copper
Metallic braid conductance
Composite Cu/Fe braid ('B') meets French mine earth-fault impedance limits

Thermal

Max. conductor temperature
+90 °C continuous operation
Short-circuit temperature
+250 °C max. (up to 5 s)
Temperature, flexing
−25 °C to +80 °C
Temperature, fixed
−40 °C to +80 °C

Mechanical

Min. bending radius, fixed
6 × overall diameter
Min. bending radius, moving
10 × overall diameter
Crush & impact resistance
High-coverage copper/steel wire braid ('B') + inner rubber bedding
Max. tensile load
15 N/mm² on copper conductors

Resistance

Flame retardance
NF C 32-070 Cat. C2 & IEC 60332-1-2 self-extinguishing
Oil & chemical resistance
EN 60811-404 mineral oil, hydraulic emulsion & grease resistant
Abrasion & tear
Heavy-duty Type U elastomer outer jacket resists rock drag
Water & humidity
Subterranean mine water and mud resistant

Reference standards

Construction standards
NF M 82-376 (1-CHBU) & NF M 82-377 (3-CHBU / 6-CHBU)
Conductor standard
IEC 60228 / NF C 32-013 Class 5
Flame test standard
NF C 32-070 Category C2 / IEC 60332-1-2
RoHS & REACH
2011/65/EU (RoHS 2) & EC 1907/2006 compliant

Identification

Sheath colour
Black (or yellow/red by voltage class on request)
Core identification
Numbered or colour-coded phase cores + earth conductor
Sheath marking
TEBAOFLEX [1-CHBU / 3-CHBU / 6-CHBU] [Size] NF M 82-376/377 CE
Customs tariff (HS)
8544.49 (≤ 1000 V) / 8544.60 (> 1000 V)

Sizes

15 standard 1-CHBU / 3-CHBU / 6-CHBU configurations

Typical NF M 82-376 / NF M 82-377 outer diameter limits, copper content and cable weight.

Dimensions & weights
Order designationCores × mm²AWG ≈Outer Ø min
mm		Outer Ø max
mm		Copper
kg/km		Weight ≈
kg/km		Min. bend R
mm		Enquiry
1-CHBU (0.6/1 kV · NF M 82-376) Low-Voltage Armoured Mining Cables
1-CHBU 4G4 (0.6/1 kV)4G41217.318.8154540113
1-CHBU 4G10 (0.6/1 kV)4G10822.824.83841,020149
1-CHBU 3×25+1×16 (0.6/1 kV)3×25+1×16429.331.88741,820191
1-CHBU 3×50+1×25 (0.6/1 kV)3×50+1×25137.040.21,6803,120241
1-CHBU 3×95+1×50 (0.6/1 kV)3×95+1×503/046.750.83,2165,480305
3-CHBU (1.8/3 kV · NF M 82-377) 3 kV Medium-Voltage Armoured Mining Cables
3-CHBU 3×25+1×16 (1.8/3 kV)3×25+1×16432.835.68742,190214
3-CHBU 3×35+1×16 (1.8/3 kV)3×35+1×16235.738.81,1622,680233
3-CHBU 3×50+1×25 (1.8/3 kV)3×50+1×25140.343.81,6803,510263
3-CHBU 3×70+1×35 (1.8/3 kV)3×70+1×352/044.748.62,3524,620292
3-CHBU 3×95+1×50 (1.8/3 kV)3×95+1×503/049.954.23,2165,940325
6-CHBU (3.6/6 kV · NF M 82-377) 6 kV Medium-Voltage Armoured Mining Cables
6-CHBU 3×25+1×16 (3.6/6 kV)3×25+1×16437.240.48742,690242
6-CHBU 3×35+1×16 (3.6/6 kV)3×35+1×16240.143.61,1623,210262
6-CHBU 3×50+1×25 (3.6/6 kV)3×50+1×25144.548.41,6804,080290
6-CHBU 3×70+1×35 (3.6/6 kV)3×70+1×352/048.953.22,3525,240319
6-CHBU 3×95+1×50 (3.6/6 kV)3×95+1×503/054.158.83,2166,610353
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Dimensions and weights are typical values per NF M 82-376 / NF M 82-377. Minimum fixed bending radius shown is 6 × OD.

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

Drum core 300 mm is below 526 mmUse a larger drum core or a smaller cable size
Minimum bending radius
263 mm
Min. drum core diameter
≈ 526 mm
Cable weight on drum
175.5 kg
Copper content
84.0 kg
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
AC voltage test6.5 kV AC (50 Hz)Every manufactured length
Conductor DC resistanceIEC 60228 Class 5 (tinned copper)Every manufactured length
Sample tests
Vertical flame propagationIEC 60332-1-2 / EN 60332-1-2Per production batch
Insulation & sheath elastomer physical propertiesNF M 82-376 / NF M 82-377Type approval

Inspection certificate

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

Product approvals

NF M 82-376 / NF M 82-377CE · RoHS 2 (2011/65/EU) · REACH

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX 1-CHBU / 3-CHBU / 6-CHBU [Size] NF M 82-376/377 CE
Delivery form
Export wooden drums or coils, cut-to-length on request
Packaging
Heat-treated ISPM-15 timber drums with sealed cable ends
Conductor / sheath options
Custom core counts, pilot cores or sheath colours on request

Technical documents

Downloads

PDF1-CHBU / 3-CHBU / 6-CHBU CHBU Mining Equipment Interconnection – technical datasheet15 sizes · construction, technical data, approvalsXLSX1-CHBU / 3-CHBU / 6-CHBU spec data (Excel)All 15 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.

How are 1-CHBU, 3-CHBU and 6-CHBU differentiated by voltage rating?
In the French Charbonnages de France / AFNOR mining designation system (NF M 82-376 and NF M 82-377), the leading digit specifies the nominal phase-to-phase voltage class in kilovolts: 1-CHBU is rated 0.6/1 kV (test 3.0 kV), 3-CHBU is rated 1.8/3 kV (test 6.5 kV), and 6-CHBU is rated 3.6/6 kV (test 11.0 kV).
What do the letters C-H-B-U represent?
'C' denotes Class 5 flexible copper conductors (Cuivre souple); 'H' denotes high-dielectric cross-linked EPR core insulation; 'B' denotes the collective mixed copper/steel wire armour braid (Blindage) applied over the inner bedding; and 'U' denotes the extra-heavy-duty tear-, oil- and flame-resistant polychloroprene/elastomer outer sheath.
Why does CHBU use a mixed copper and galvanised-steel braid ('B')?
Combining tinned copper wires and high-tensile galvanised steel wires in the collective braid achieves two goals in one layer: low electrical fault-loop impedance to trip mine ground-fault relays instantaneously upon rock penetration, and high radial crush resistance without sacrificing cable flexibility.
Can CHBU cables be manufactured with integrated pilot cores?
Yes. Both 3+1 power-plus-earth constructions and assemblies with 1 to 3 interstitial 2.5 mm² pilot cores are manufactured to match French and international flameproof mining switchgear.

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1-CHBU / 3-CHBU / 6-CHBU CHBU Mining Equipment Interconnection

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Reel & motion:
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- Destination country: 
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