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Product

ASTM B856 ACSS ASTM B856 / IEC 62420Up to 500 kV AC−40…+200 °C

ACSS High-Temperature Overhead ConductorASTM B856 / IEC 62420 · Up to 500 kV AC · -40 °C to +200 °C industrial ACSS construction

ACSS (Aluminum Conductor Steel Supported) High-Temperature Overhead Conductor (ACSS) engineered to ASTM B856 / IEC 62420 for Up to 500 kV AC service across -40 °C to +200 °C, featuring high-strength galvanized / galfan steel core and fully annealed 1350-o

Approved

Outdoor & humid

Ozone, UV & moisture

Nominal area

Order designation: ACSS 240 mm²
Outer Ø ≈: 21.8 mm
Total weight ≈: 885 kg/km
Rated tensile ≈: 84.5 kN
Stranding: 26/3.44 + 7/2.68

All sizes (10)

Request a quote Datasheet WhatsApp info@tebaoflex.com

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

Rated voltage: Up to 500 kV AC
Operating temp.: −40…+200 °C
Min. bend radius: 20 × OD
Conductor: High-strength
Outer layer: Fully annealed
Standard: ASTM B856

Typical values for this cable type, based on ASTM B856 / IEC 62420 — confirmed in the datasheet and quotation for your order.

Application fit

Is ACSS right for your machine?

Fixed installation

Suitable

Engineered and verified for fixed service in accordance with ASTM B856 / IEC 62420.

Switchgear & control cabinet wiring

Suitable

Suitable for switchgear, control panels and equipment terminations within 20 × OD bend radius.

TBM gantry & advancing tunnel reel

With conditions

Use mechanical conduit or armoured protection where exposed to rock fall or crushing loads.

Motorised monospiral reel

Not suitable

Not designed for high-speed monospiral crane reeling; select a dedicated reeling cable.

NSHTOU Reeling Cable

Typical machinesRenewable Energy & EV ChargingHigh-Voltage Grid & Substation InterconnectsWind, Solar & Hydro Power EvacuationUtility Overhead & Underground DistributionIndustrial Power InfrastructureMetallurgical, Glass & Ceramic Furnaces

Construction

Layer by layer

Shown: ACSS (ASTM B856 / IEC 62420) with high-strength galvanized / galfan steel core, fully annealed 1350-o aluminum outer layers and fully annealed 1350-o aluminum outer layers (2-layer construction).

Schematic, not to scale — generated from the layer data

#	Layer	Material & reference
1	High-strength galvanized / Galfan steel core	7-wire or 19-wire high-tensile coated steel core supporting full mechanical tensionASTM B856 / IEC 62420
2	Fully annealed 1350-O aluminum outer layers	Soft-annealed 1350-O aluminum wires (63 % IACS) rated to +200/+250 °C continuousASTM B856 / IEC 62420

ACSS — Standard Execution

Built to ASTM B856 / IEC 62420 with high-strength galvanized / galfan steel core and fully annealed 1350-o

ACSS — Custom Cross-Sections

Full range of metric mm² and AWG/kcmil conductor sizes per ASTM B856 / IEC 62420

ACSS — Export Drum Supply

Supplied with EN 10204 3.1 routine dielectric & conductor resistance test certificate

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on ASTM B856 / IEC 62420. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage / duty: Up to 500 kV AC (ASTM B856 / IEC 62420)
Conductor construction: High-strength galvanized / Galfan steel core — 7-wire or 19-wire high-tensile coated steel core supporting full mechanical tension
Primary insulation / dielectric: Fully annealed 1350-O aluminum outer layers — Soft-annealed 1350-O aluminum wires (63 % IACS) rated to +200/+250 °C continuous

Thermal

Continuous operating temperature: −40…+200 °C per ASTM B856 / IEC 62420
Short-circuit / peak thermal limit: +160 °C to +250 °C (5 s adiabatic limit depending on dielectric class)
Minimum installation temperature: −5 °C (thermoplastic) / −25 °C (cross-linked or elastomer) / −40 °C (metallic)

Mechanical

Outer protection / covering: Fully annealed 1350-O aluminum outer layers — Soft-annealed 1350-O aluminum wires (63 % IACS) rated to +200/+250 °C continuous
Minimum bending radius: 20 × OD (installed / static routing)
Layer count & geometry: 2 concentric/structural layers verified by cross-section inspection

Resistance

Environmental & chemical durability: Engineered for industrial service in accordance with ASTM B856 / IEC 62420
RoHS & REACH compliance: RoHS 2 (2011/65/EU + 2015/863) & REACH SVHC compliant

Reference standards

Governing product standard: ASTM B856 / IEC 62420
Quality management & inspection: ISO 9001:2015 & EN 10204 3.1 factory routine inspection

Identification

Model designation: ACSS
Customs tariff (HS): 8544.49 / 8544.60 / 7614.10

Sizes

10 standard ACSS overhead conductor sizes

Manufactured to ASTM B856 / IEC 62420 in standard cross-sections from 50 mm² to 630 mm² (and North American AWG/kcmil code words).

Dimensions, stranding, breaking load & weights
Order designation	Nominal area	Stranding	Outer Ø ≈ mm	Weight ≈ kg/km	Rated tensile kN ≈	Min. sheave R mm
ACSS Standard Transmission & Distribution Schedule (−40…+200 °C)
ACSS 50 mm²	50 mm²	7/3.00 mm	9.0	138	14.5	180
ACSS 95 mm²	95 mm²	19/2.52 mm	12.6	262	28.2	252
ACSS 120 mm²	120 mm²	19/2.85 mm	14.3	334	36.4	286
ACSS 150 mm²	150 mm²	26/2.70 + 7/2.10	17.1	546	53.8	342
ACSS 185 mm²	185 mm²	26/3.00 + 7/2.33	19.0	674	65.2	380
ACSS 240 mm²	240 mm²	26/3.44 + 7/2.68	21.8	885	84.5	436
ACSS 300 mm²	300 mm²	26/3.86 + 7/3.00	24.5	1,110	104.2	490
ACSS 400 mm²	400 mm²	54/3.08 + 7/3.08	27.7	1,432	126.0	554
ACSS 500 mm²	500 mm²	54/3.44 + 7/3.44	31.0	1,790	156.5	620
ACSS 630 mm²	630 mm²	54/3.86 + 19/2.32	34.8	2,245	194.0	696

Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
Custom kcmil/code-word sizes, grease-filled corrosion protection and non-specular surface finishes available per ASTM B856 / IEC 62420.

DC resistance & continuous current ratings
Nominal area	Max. DC R₂₀ Ω/km	Continuous current A ≈	Operating temp.
50 mm²	0.578	210	−40…+200 °C
95 mm²	0.304	320	−40…+200 °C
150 mm²	0.192	435	−40…+200 °C
240 mm²	0.119	590	−40…+200 °C
400 mm²	0.072	820	−40…+200 °C
630 mm²	0.046	1,080	−40…+200 °C

Ampacity calculated per IEEE 738 (0.6 m/s wind, 40 °C ambient, 0.5 solar absorptivity / emissivity).

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
Conductor DC resistance & dimensional verification (ASTM B856 / IEC 62420)	DC resistance at 20 °C and geometry within ASTM B856 / IEC 62420 class limits	Every manufactured drum / spool
Routine dielectric / spark / structural integrity test (ASTM B856 / IEC 62420)	Zero breakdown or structural defect over full production length	Every manufactured drum / spool
Sample tests
Thermal aging, mechanical & material qualification (ASTM B856 / IEC 62420)	Full compliance with ASTM B856 / IEC 62420 across −40…+200 °C	Type qualification & periodic sample audit

Inspection certificate

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

Product approvals

ASTM B856 CompliantEN 10204 3.1 Routine Test CertificateCE, RoHS 2 (2011/65/EU) & REACH

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX ACSS <size> ASTM B856 Up to 500 kV AC CE

Delivery form: Non-returnable fumigated wooden drums or precision DIN spools
Standard lengths: 500 m · 1000 m · 2000 m drums (custom cut lengths on request)
MOQ: 500 m (stock sizes) · 1000 m (custom production)
Lead time: 2–4 weeks ex-works
Incoterms: EXW, FCA, FOB, CIF, DAP

Technical documents

Downloads

PDFACSS High-Temperature Overhead Conductor – technical datasheet10 sizes · construction, technical data, approvals XLSXACSS spec data (Excel)All 10 sizes with dimensions and data, for your BOM or quotation

Revision: 2026-10-21
Updated: 2026-10-21

FAQ

Questions engineers ask first

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

What governing standard and construction define ACSS (ACSS (Aluminum Conductor Steel Supported) High-Temperature Overhead Conductor)?

ACSS (ACSS (Aluminum Conductor Steel Supported) High-Temperature Overhead Conductor) is manufactured in accordance with ASTM B856 / IEC 62420 for Up to 500 kV AC service over -40 °C to +200 °C. Its 2-layer construction comprises high-strength galvanized / galfan steel core, fully annealed 1350-o aluminum outer layers.

What is the minimum bending radius and installation temperature for ACSS?

The minimum installed bending radius for ACSS is 20 × OD across its continuous operating temperature range of -40 °C to +200 °C, ensuring mechanical and dielectric stability without conductor or insulation strain.

How are the concentric layers of ACSS arranged from inside to outside?

From inside to outside, the construction sequence is: (01) High-strength galvanized / Galfan steel core (7-wire or 19-wire high-tensile coated steel core supporting full mechanical tension); (02) Fully annealed 1350-O aluminum outer layers (Soft-annealed 1350-O aluminum wires (63 % IACS) rated to +200/+250 °C continuous).

What factory test certificates are supplied with ACSS?

Every production drum or spool of ACSS undergoes routine conductor DC resistance, dimensional and dielectric/integrity testing per ASTM B856 / IEC 62420, and is delivered with an EN 10204 3.1 factory test certificate.

Request a quote

Get an engineering quote for ACSS

Your selection and application details are copied into the enquiry form below.

01Selected sizes

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02Reel & motion

Add your operating conditions here to include them in your enquiry.

Reel typeDrum core diameter (mm)Cable length on drum (m)Travel speed (m/min)Max. accelerationCycles per hourLength and quantityAmbient temperatureExposure (outdoor, water, oil, abrasion)Destination countryEquipment and operating conditions

03Message for our engineers

ACSS High-Temperature Overhead Conductor

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: 
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