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Product

IEC 60584-3 Type NC compensating cableIEC 60584-3 Type NC (NCA/NCB)Cu (+) / CuNi (−) CompensatingClass 2 (±2.5 °C) · Low Loop R

NC Type N Thermocouple Compensating CableCu / CuNi compensating cable (NCA / NCB) for Type N (Nicrosil-Nisil) thermocouples

Low-resistance Type NC (NCA 0…+200 °C and NCB 0…+100 °C) thermocouple compensating cable built to IEC 60584-3 with specially alloyed Copper (+ Cu) and Copper-Nickel (− CuNi) conductors calibrated to match the ~27.7 µV/°C Type N (Nicrosil-Nisil) EMF slope.

Low-EMC design
EMC screen
Flame-retardant
Oil-resistant
Order designation
NCB-PVC-PiMF 4×2×1.5
Outer Ø ≈
14.3 mm
Total weight ≈
286 kg/km
Min. bend R (fixed)
107 mm
Configuration
4×2×1.5 mm² (7/0.53)
All sizes (14)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Compensates for
Type N (NiCrSi)
Nicrosil-Nisil thermocouples
Alloy pair
Cu (+) / CuNi
Copper (+) / N-calibrated CuNi (−)
Junction ranges
0…+100 / +200 °C
NCB (0…+100 °C) · NCA (0…+200 °C)
EMF tolerance
Class 2: ±2.5 °C
±65 µV (measured at 900 °C)
Loop resistance
≈ 0.36 Ω/m/pair
at 1.0 mm² (vs 1.35 Ω/m on NX)
IEC colour code
+ Pink / − White
Pink outer jacket (or Ex-i Blue)

Typical values for this cable type, based on IEC 60584-3 / BS EN 50288-7 — confirmed in the datasheet and quotation for your order.

Application fit

Is NC right for your machine?

Engineered for long multi-pair Type N thermocouple trunk runs in steel plants, ethylene crackers, boilers and power stations where true Nicrosil/Nisil (NX) cable would have excessive loop resistance (1.35 Ω/m) or cost.

Fixed installation

Suitable

Available in PVC, XLPE/LSZH, +200 °C FEP (NCA) and SWA armoured multi-pair constructions.

TBM gantry & advancing tunnel reel

Suitable

SWA armoured execution (NCB-XLPE-SWA) protects underground petrochemical and steel-plant trunks.

Offshore platform & shipboard deck trays

Suitable

Non-ferrous Cu/CuNi conductors resist corrosion in humid and coastal process plants.

Typical machinesSteel Blast Furnaces, Stoves & Reheat FurnacesEthylene Crackers & Petrochemical HeatersPower Generation Boilers & SuperheatersCeramic, Brick & Refractory Tunnel KilnsIndustrial Incineration & Flue-Gas Trunks

Construction

Layer by layer

Shown: NCB-PVC-PiMF 4×2×1.0 mm² (IEC 60584-3) with 7-wire stranded Cu (+) and N-calibrated CuNi (−) conductors, Pink (+) / White (−) numbered insulation, individual & collective Al/PET screens and Pink RAL 3015 outer sheath.

12345
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Matched Type NC (NCA/NCB) compensating conductorsPositive (+): High-purity Copper (Cu) · Negative (−): Type-N-calibrated Copper-Nickel (CuNi ~70/30 alloy), 7-wire strandedMatches the ~27.7 µV/°C Type N slope while reducing loop resistance by 73 % compared with NX
2Colour-coded core insulationFlame-retardant PVC, XLPE or +200 °C FEP (IEC: + Pink / − White; ANSI: + Orange / − Red)High insulation resistance and unambiguous polarity identification
3Individual & collective Al/PET screensAluminium/PET laminated tape + 0.5 mm² tinned copper drain wire (OS or PiMF+OS)100 % electrostatic shielding
4Optional SWA armourUnarmoured or Galvanised Steel Wire Armour (SWA) over extruded beddingMechanical crush protection for multi-pair plant trunks
5Outer jacket (Pink RAL 3015, Orange or Ex-i Blue)Flame-retardant PVC, Low-Smoke Zero-Halogen (LSZH), or fluoropolymer FEPIEC 60332-1-2 / IEC 60332-3-24 flame retardant

NCB — IEC 60584-3 (0…+100 °C)

Positive (+) Pink, Negative (−) White, Outer Jacket Pink (RAL 3015) for ambient marshalling boxes

NCA — Extended Range (0…+200 °C)

FEP/HR-PVC insulated NCA compensating alloy pair calibrated up to +200 °C

NCB-XLPE-SWA (Armoured Trunk)

XLPE insulated, SWA armoured multi-pair trunk cable

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on IEC 60584-3 / BS EN 50288-7. Values for your order are confirmed in the datasheet and quotation.

Electrical

Compensated thermocouple type
Type N (Nicrosil-Nisil, NiCrSi-NiSi) per IEC 60584-1
Positive conductor (+)
High-conductivity Copper (Cu, non-magnetic, ~1.72 µΩ·cm)
Negative conductor (−)
Type-N-calibrated Copper-Nickel (CuNi alloy, non-magnetic, ~34 µΩ·cm)
Tolerance Class 2 (IEC 60584-3)
±2.5 °C (±65 µV) over 0…+100 °C (NCB) or 0…+200 °C (NCA)
Loop resistance @ 20 °C
≈ 0.72 Ω/m (0.5 mm²) · 0.36 Ω/m (1.0 mm²) · 0.24 Ω/m (1.5 mm²)

Thermal

Permissible junction temperature range
0 °C to +100 °C (Type NCB) · 0 °C to +200 °C (Type NCA)
Insulation rating (by jacket type)
−25…+105 °C (PVC) · −40…+90 °C (XLPE/LSZH) · −60…+200 °C (FEP)

Mechanical

Conductor stranding
0.5 mm² (7/0.30) · 1.0 mm² (7/0.43) · 1.5 mm² (7/0.53)
Min. bending radius
7.5 × OD (unarmoured) · 10 × OD (SWA armoured)

Resistance

Flame retardance
IEC 60332-1-2 & IEC 60332-3-24 Cat C
Corrosion resistance
100 % non-ferrous Cu/CuNi conductors

Reference standards

Thermocouple cable standard
IEC 60584-3 & ANSI/ISA MC96.1
Cable construction standard
BS EN 50288-7 / BS 5308

Identification

IEC 60584-3 colour code
(+) Pink · (−) White · Outer sheath: Pink (or Blue Ex-i)
ANSI MC96.1 colour code
(+) Orange · (−) Red · Outer sheath: Orange
Customs tariff (HS)
8544.49

Sizes

14 standard NC (NCA / NCB) Type N compensating cable sizes

1 to 24 pairs in PVC, +200 °C FEP (NCA) and XLPE/LSZH/SWA armoured constructions.

Dimensions, construction & weights
Order designationConfigurationInsulation / SheathJunction rangeOuter Ø ≈
mm		Weight ≈
kg/km		Min. bend R
fixed mm		Enquiry
NCB PVC / PVC Screened Marshalling Cables (0…+100 °C)
NCB-PVC-OS 1×2×0.51×2×0.5 mm² (7/0.30)PVC / PVC (OS)0…+100 °C5.64442
NCB-PVC-PiMF 2×2×0.52×2×0.5 mm² (7/0.30)PVC / PVC (PiMF+OS)0…+100 °C8.68464
NCB-PVC-PiMF 4×2×0.54×2×0.5 mm² (7/0.30)PVC / PVC (PiMF+OS)0…+100 °C10.814281
NCB-PVC-PiMF 8×2×0.58×2×0.5 mm² (7/0.30)PVC / PVC (PiMF+OS)0…+100 °C14.1246106
NCB-PVC-PiMF 12×2×0.512×2×0.5 mm² (7/0.30)PVC / PVC (PiMF+OS)0…+100 °C16.9348127
NCB-PVC-OS 1×2×1.01×2×1.0 mm² (7/0.43)PVC / PVC (OS)0…+100 °C6.76850
NCB-PVC-PiMF 4×2×1.04×2×1.0 mm² (7/0.43)PVC / PVC (PiMF+OS)0…+100 °C12.821296
NCB-PVC-OS 1×2×1.51×2×1.5 mm² (7/0.53)PVC / PVC (OS)0…+100 °C7.59256
NCB-PVC-PiMF 4×2×1.54×2×1.5 mm² (7/0.53)PVC / PVC (PiMF+OS)0…+100 °C14.3286107
NCA FEP / FEP Extended-Range Compensating Cables (0…+200 °C)
NCA-FEP-OS 1×2×1.01×2×1.0 mm² (7/0.43)FEP / FEP (OS)0…+200 °C5.65842
NCA-FEP-PiMF 4×2×1.04×2×1.0 mm² (7/0.43)FEP / FEP (PiMF+OS)0…+200 °C11.218884
NCB XLPE / LSZH / SWA Armoured Direct-Burial Trunks (0…+90 °C)
NCB-XLPE-SWA 1×2×1.51×2×1.5 mm² (7/0.53)XLPE / SWA / LSZH0…+90 °C12.1298121
NCB-XLPE-SWA 4×2×1.54×2×1.5 mm² (7/0.53)XLPE / SWA / LSZH0…+90 °C19.8745198
NCB-XLPE-SWA 8×2×1.58×2×1.5 mm² (7/0.53)XLPE / SWA / LSZH0…+90 °C25.41,210254
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Do not interchange KCB and NCB: although both use Cu/CuNi alloys, NCB uses a different CuNi composition matched to ~27.7 µV/°C instead of ~40.6 µV/°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
Thermoelectric EMF calibration test (IEC 60584-3 Class 2)EMF deviation within ±2.5 °C (±65 µV) over 0…+100 °C (NCB) or 0…+200 °C (NCA)Every alloy batch
1500 V / 2000 V AC dielectric & continuity test1 min AC withstand test without breakdownEvery manufactured drum

Inspection certificate

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

Product approvals

IEC 60584-3 Class 2 (NCA / NCB) CertifiedBS EN 50288-7 & BS 5308 CompliantCE, RoHS 2 (2011/65/EU) & REACH

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX NC TYPE N COMPENSATING <size> IEC 60584-3 CLASS 2 CE
Delivery form
Non-returnable fumigated wooden drums
Standard lengths
500 m · 1000 m standard drums (cut lengths on request)
MOQ
500 m (stock sizes) · 1000 m (custom)
Lead time
2–4 weeks ex-works
Incoterms
EXW, FCA, FOB, CIF, DAP

Technical documents

Downloads

PDFNC Type N Thermocouple Compensating Cable – technical datasheet14 sizes · construction, technical data, approvalsXLSXNC spec data (Excel)All 14 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.

Can KCB (Cu/CuNi for Type K) be used instead of NC (Cu/CuNi for Type N)?
No. Although both KCB and NC use Copper (+) and Copper-Nickel (−) conductors, the Nickel percentage in the negative leg is formulated differently: KCB generates ~4.10 mV at +100 °C to match Type K, whereas NC generates ~2.77 mV at +100 °C to match Type N. Mixing them causes a ~13 µV/°C cold-junction error.
What is the difference between NCA and NCB under IEC 60584-3?
NCB is calibrated for transition junction temperatures from 0 °C to +100 °C, whereas NCA is calibrated over an extended 0 °C to +200 °C junction range. Both hold a Class 2 tolerance of ±2.5 °C (±65 µV).
Why does NC have 73 % lower loop resistance than true NX extension cable?
True NX uses Nicrosil (98 µΩ·cm) and Nisil (37 µΩ·cm), giving ~1.35 Ω/m per 1.0 mm² pair. NC replaces the positive leg with pure Copper (1.72 µΩ·cm) and the negative leg with low-nickel CuNi (~34 µΩ·cm), dropping loop resistance to ~0.36 Ω/m.
How should the screen and drain wire of NC be earthed in instrumentation and Ex-i loops?
To prevent circulating 50/60 Hz ground-loop currents from coupling into millivolt or 4–20 mA signals, the Al/PET screen and tinned copper drain wire of NC should be bonded to the clean instrumentation earth bar at one end only (typically in the control/marshalling cabinet) and insulated against chassis contact at the field transmitter or junction box, in accordance with IEC 60079-14 and EN 50288-7.

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NC Type N Thermocouple Compensating Cable

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True Nicrosil/Nisil Class 1 Type N thermocouple extension cable

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KCA

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