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GOST 24334 Industrial & Welding Rubber CablesGOST 24334660 V AC / 1000 V DCHeat-Resistant 'T' + PCP 'n'

KGTn / AKGTn Heat-Resistant Flexible Rubber Power and WeldingGOST 24334 · 660 V AC / 1000 V DC · +90 °C heat-resistant ('T') · Oil/flame PCP ('n') ·

KGTn (flexible copper) and AKGTn (flexible aluminium) are heat-resistant ('T', +90 °C) flexible rubber power and arc-welding cables manufactured to GOST 24334 / TU 16.K73. The 'n' suffix specifies an oil-resistant, flame-retardant polychloroprene (nairit)

Oil-resistant

Flame-retardant

Outdoor & humid

Anti-torsion braid

Type & Core Configuration

Order designation: KGTn 1×70 (Cu welding/power)
Outer Ø ≈: 17.8 mm
Copper weight: 672 kg/km
Total weight ≈: 830 kg/km
Min. bend R (fixed): 142 mm

All sizes (12)

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Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum

Rated voltage: 660 V / 1000 V
Conductor max.: +90 °C ('T')
Ambient range: -30 to +55 °C
Min. bend R: 8 × overall Ø
Conductor metal: Cu (KGTn) / Al
Outer sheath: PCP ('n' nairit)

Typical values for this cable type, based on GOST 24334 / TU 16.K73 — confirmed in the datasheet and quotation for your order.

Application fit

Is KGTn / AKGTn right for your machine?

Engineered for hot industrial environments up to +55 °C ambient, including foundry cranes, metallurgical transfer cars, arc-welding electrode leads, and tropical plant machinery.

Trailing & towing

Suitable

Primary flexible feeder for arc-welding sets, slag-pot transfer cars, and hot-shop mobile tools.

Festoon & line chain

Suitable

Widely used on overhead foundry and steel-mill crane festoons exposed to radiant heat.

Motorised monospiral reel

Suitable

Suitable for spring and motorized transfer-car cable reels at up to 15 N/mm² tensile load.

Furnace, kiln & high-temp zone

Suitable

+90 °C heat-resistant ('T') rubber withstands elevated ambient temperatures near kilns and furnaces.

Immersion & wet locations

With conditions

Splash and rain resistant; select AD8-rated H07RN8-F or S1BN8-F for permanent water submersion.

S1BN8-F 0.6/1 kV

Typical machinesFoundries & SteelworksManual & Automated Arc WeldingOverhead Bridge & Gantry CranesCement Kiln & Glass Plant AuxiliariesTropical & Hot-Climate Mining

Construction

Layer by layer

Flexible copper (KGTn) or flexible stranded aluminium (AKGTn) conductors, PET separator film, +90 °C heat-resistant rubber insulation

Schematic, not to scale — generated from the layer data

#	Layer	Material & reference
1	Flexible Cu (KGTn) or Al (AKGTn)	Class 5 fine-stranded copper (KGTn) or flexible multi-wire aluminium alloy conductorGOST 22483 / IEC 60228
2	PET thermal separator film	Polyethylene terephthalate (PET-E) film preventing rubber adhesion to strands duringGOST 24334
3	+90 °C heat-resistant rubber ('T')	Heat-resistant ethylene-propylene / synthetic elastomer insulation compound RTI-1GOST 24334
4	Oil & flame-retardant PCP sheath ('n')	Polychloroprene (nairit) rubber compound RShN-1/RShN-2 resistant to oil, weld spatterGOST 24334

KGTn (1 to 5 cores, Cu)

Flexible copper conductor (1.5–150 mm²) for welding electrode leads and three-phase hot-shop crane feeders.

AKGTn (1 to 4 cores, Al)

Lightweight flexible aluminium conductor (16–150 mm²) reducing weight and cost on high-current welding and

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on GOST 24334 / TU 16.K73. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage U0/U: 660 V AC (up to 400 Hz) / 1000 V DC
Routine AC test voltage: 2.5 kV rms / 5 min
Insulation resistance at +20 °C: ≥ 50 MΩ·km
Conductor standard: GOST 22483 / IEC 60228
Welding duty compatibility: AC & DC arc welding up to 1000 A
Operating frequency: 50–400 Hz & DC

Thermal

Max. conductor operating temp.: +90 °C continuous ('T' heat grade)
Max. short-circuit temperature: +250 °C (max. 5 s)
Operating ambient range: -30 °C to +55 °C
Difference vs standard KG: +90 °C conductor vs +75 °C on KG
Weld spatter resistance: Thermoset polychloroprene ('n')
Min. installation temperature: -15 °C without pre-heating

Mechanical

Min. bend radius (dynamic): 8 × overall diameter (D)
Max. tensile pull (KGTn Cu): 15 N/mm² of total copper area
Max. tensile pull (AKGTn Al): 10 N/mm² of total aluminium area
Sheath tensile strength: ≥ 10.8 MPa (RShN compound)
Sheath elongation at break: ≥ 300 %
Dynamic flexing cycles: ≥ 30,000 reverse bend cycles

Resistance

Flame retardance ('n'): GOST / IEC 60332-1-2 self-extinguishing
Mineral oil & lubricant ('n'): Oil-resistant polychloroprene RShN
Solar UV & tropical climate: Sunlight and mould resistant
Ozone & hot-air ageing: Heat-stabilised RTI-1 & RShN elastomers
Abrasion & slag spatter: Heavy-duty welding rubber sheath
Halogen status: Polychloroprene elastomer

Reference standards

Primary product standard: GOST 24334 / TU 16.K73
Conductor standard: GOST 22483 / IEC 60228
Flame test standard: IEC 60332-1-2
European functional equivalent: H07RN-F / H01N2-D (+90 °C)
Tropical climate execution: T / UHL climate category
Quality certification: EN 10204 3.1 / GOST EAC

Identification

Core identification: Blue, brown, black, grey, green/yellow
Earth core marking: Green/yellow or '0' neutral core
Outer sheath colour: Black
Surface marking: TEBAOFLEX KGTn / AKGTn [n×mm²] GOST 24334
Length marking: Sequential metre marking
Batch traceability: Drum number & year code

Sizes

12 standard configurations (KGTn / AKGTn)

Nominal dimensions, copper weights and electrical parameters for KGTn / AKGTn per GOST 24334 / TU 16.K73.

Dimensions & weights
Order designation	Type & Core Configuration	Phase size mm²	Outer Ø ≈ mm	Copper kg/km	Weight ≈ kg/km	Min. bend R fixed mm
KGTn — Flexible Class 5 copper conductor (+90 °C heat-resistant)
KGTn 1×25 (Cu welding/power)	1×25 (Cu)	25	12.2	240	325	98
KGTn 1×35 (Cu welding/power)	1×35 (Cu)	35	13.6	336	435	109
KGTn 1×50 (Cu welding/power)	1×50 (Cu)	50	15.8	480	610	126
KGTn 1×70 (Cu welding/power)	1×70 (Cu)	70	17.8	672	830	142
KGTn 3×4+1×2.5 (Cu)	3×4 + 1×2.5 (Cu)	4	15.6	139	345	125
KGTn 3×10+1×6 (Cu)	3×10 + 1×6 (Cu)	10	20.8	346	690	166
KGTn 3×16+1×10 (Cu)	3×16 + 1×10 (Cu)	16	24.2	557	1,010	194
KGTn 3×25+1×10 (Cu)	3×25 + 1×10 (Cu)	25	28.0	816	1,410	224
KGTn 3×35+1×16 (Cu)	3×35 + 1×16 (Cu)	35	31.4	1,162	1,890	251
AKGTn — Flexible multi-strand aluminium conductor (+90 °C heat-resistant)
AKGTn 1×35 (Al welding/power)	1×35 (Al)	35	13.8	0	215	110
AKGTn 1×50 (Al welding/power)	1×50 (Al)	50	16.0	0	295	128
AKGTn 3×25+1×10 (Al)	3×25 + 1×10 (Al)	25	28.4	0	860	227

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 GOST 24334 / TU 16.K73.

Electrical & ampacity data
Configuration	Max. DC R @ 20 °C Ω/km	Current rating in air (A)	Current rating installed (A)	Mutual C pF/m ≈	AC test V rms
1×25 (Cu)	0.780	123	105	114	2,500
1×35 (Cu)	0.554	152	129	129	2,500
1×50 (Cu)	0.386	189	161	150	2,500
1×70 (Cu)	0.272	233	198	180	2,500
3×4 + 1×2.5 (Cu)	4.950	40	34	84	2,500
3×10 + 1×6 (Cu)	1.910	70	60	92	2,500
3×16 + 1×10 (Cu)	1.210	93	79	101	2,500
3×25 + 1×10 (Cu)	0.780	123	105	114	2,500
3×35 + 1×16 (Cu)	0.554	152	129	129	2,500
1×35 (Al)	0.909	152	129	129	2,500
1×50 (Al)	0.633	189	161	150	2,500
3×25 + 1×10 (Al)	1.279	123	105	114	2,500

Current ratings apply at +25/+30 °C ambient in free air; apply standard derating factors for elevated ambient or drum coiling.

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.

ConductorClass 5 stranding
Spark test100 % in-line
Lay-upCores, earth, fillers
SheathingInner, braid / screen, outer
Electrical testsAC voltage, resistance
DimensionsOD, wall thickness
Inspection documents & dispatchDrum & dispatch

Testing & inspection	Test value / reference	Frequency
Routine tests
AC voltage withstand test	2.5 kV rms for 5 minutes at 50 Hz	Every drum
Conductor DC resistance (Cu & Al)	Complies with GOST 22483 / IEC 60228 at 20 °C	Every drum
Sample tests
Roller-pulley reverse flexing test	≥ 30,000 flexing cycles under rated current load without break	Per batch
+90 °C thermal ageing, oil & flame test	Passes GOST 24334 RTI-1 heat ageing, RShN oil immersion & IEC 60332-1-2	Type approval

Inspection certificate

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

Product approvals

GOST 24334 / TU 16.K73IEC 60332-1-2CE / EAC

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX KGTn 660V [n×mm²] GOST 24334 CE

Delivery form: Fumigated export wooden drums or coils
Standard drum lengths: 500 m · 1000 m (or custom cut lengths)
MOQ: 100 m (stock sizes) · 300–500 m (production)
Lead time: 2–4 weeks ex-works
Incoterms: EXW, FOB, CIF, DAP

Technical documents

Downloads

PDFKGTn / AKGTn Heat-Resistant Flexible Rubber Power and Welding – technical datasheet12 sizes · construction, technical data, approvals XLSXKGTn / AKGTn 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.

What do the letters 'T' and 'n' mean in KGTn and AKGTn?

In GOST 24334 nomenclature, 'KG' stands for flexible rubber cable, 'T' (теплостойкий) designates +90 °C heat-resistant rubber core insulation for ambient temperatures up to +55 °C, 'n' (найритовая) specifies an oil-resistant, flame-retardant polychloroprene outer sheath, and 'A' in AKGTn indicates a flexible multi-wire aluminium conductor.

How does KGTn differ from standard KG or KG-HL rubber cable?

Standard KG uses +75 °C natural/styrene rubber that is not oil-resistant, and KG-HL is optimized for -60 °C arctic cold, whereas KGTn upgrades to +90 °C heat-resistant insulation and an oil- and flame-resistant polychloroprene sheath for hot foundries, steel mills, and oily workshops. Each production drum undergoes routine dielectric voltage testing, conductor DC resistance verification, and dimensional inspection before dispatch with an EN 10204 3.1 mill test certificate.

When is AKGTn (flexible aluminium) chosen instead of KGTn (copper)?

AKGTn is selected for single-core arc-welding leads and mobile crane or construction feeders where reducing cable weight by 40–50 % and lowering conductor cost are priorities. Each production drum undergoes routine dielectric voltage testing, conductor DC resistance verification, and dimensional inspection before dispatch with an EN 10204 3.1 mill test certificate.

Can single-core KGTn and AKGTn be used as arc-welding electrode cables?

Yes, single-core KGTn (16–150 mm²) and AKGTn (25–150 mm²) are widely used as flexible welding electrode and return leads up to 660 V AC / 1000 V DC. Each production drum undergoes routine dielectric voltage testing, conductor DC resistance verification, and dimensional inspection before dispatch with an EN 10204 3.1 mill test certificate.

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KGTn / AKGTn Heat-Resistant Flexible Rubber Power and Welding

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Reel & motion:
- Reel type: 
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Datasheet Request a quote

KGTn / AKGTn Heat-Resistant Flexible Rubber Power and WeldingGOST 24334 · 660 V AC / 1000 V DC · +90 °C heat-resistant ('T') · Oil/flame PCP ('n') ·

Trailing & towing

Festoon & line chain

Motorised monospiral reel

Furnace, kiln & high-temp zone

Immersion & wet locations

KGTn (1 to 5 cores, Cu)

AKGTn (1 to 4 cores, Al)

Electrical

Thermal

Mechanical

Resistance

Reference standards

Identification

Inspection certificate

Product approvals

Company certificates

01Selected sizes

02Reel & motion

03Message for our engineers

H07RN-F 450/750 V

S07BB-F / S1BB-F

NSHTÖU 0.6/1 kV

2XSAW / 2XSAOW / 2XSW / 2XSOW