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Product

IEC 60584-3 Type NX thermocouple cableIEC 60584-3 / ANSI MC96.1NiCrSi (+) / NiSi (−) True NXClass 1 (±1.5 °C) · −25…+200 °C

NX Type N Thermocouple Extension CableTrue NiCrSi / NiSi (Type N) Class 1 (±1.5 °C) thermocouple extension cable

Precision Type NX thermocouple extension cable built to IEC 60584-3 and ANSI MC96.1 with true Nicrosil (+ NiCrSi) and Nisil (− NiSi) non-magnetic conductors, eliminating cold-junction drift across −25…+200 °C in aerospace and petrochemical furnaces.

Low-EMC design
EMC screen
Flame-retardant
Oil-resistant
Order designation
NX-PVC-PiMF 4×2×1.0
Outer Ø ≈
12.8 mm
Total weight ≈
212 kg/km
Min. bend R (fixed)
96 mm
Configuration
4×2×1.0 mm² (7/0.43)
All sizes (14)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Alloy pair
NiCrSi / NiSi
Nicrosil (+) / Nisil (−) true NX
EMF tolerance
Class 1: ±1.5 °C
±39 µV · Class 2: ±2.5 °C
Loop resistance
≈ 1.35 Ω/m/pair
at 1.0 mm² (0.98 + 0.37 Ω/m)
IEC colour code
+ Pink / − White
Pink outer jacket (or Ex-i Blue)
ANSI colour code
+ Orange / − Red
Orange outer jacket (ASTM E230)
Seebeck output
≈ 27.7 µV/°C
at +100 °C · non-magnetic legs

Typical values for this cable type, based on IEC 60584-3 / ANSI MC96.1 / ASTM E230 — confirmed in the datasheet and quotation for your order.

Application fit

Is NX right for your machine?

Engineered for Type N (Nicrosil-Nisil) high-stability thermocouples in AMS 2750 aerospace heat-treatment furnaces, steam crackers, gas turbines and nuclear/power instrumentation.

Fixed installation

Suitable

Supplied in 105 °C HR-PVC, XLPE/LSZH and +200 °C FEP fluoropolymer for furnace junction boxes and cable trays.

TBM gantry & advancing tunnel reel

Suitable

SWA armoured execution (NX-XLPE-SWA) protects underground petrochemical and power-plant thermocouple routes.

Offshore platform & shipboard deck trays

Suitable

Both NiCrSi and NiSi conductors are non-magnetic and highly oxidation- and corrosion-resistant.

Energy chain / drag chain

Not suitable

Static and occasional-flex thermocouple cable; not designed for continuous drag chains.

PUR Drag-Chain Control Cable
Typical machinesAMS 2750 Aerospace Heat-Treatment FurnacesEthylene Steam Crackers & Reformer TubesGas Turbines & Combined-Cycle Power PlantsMetallurgical Reheat & Annealing LinesNuclear & High-Temperature Research Reactors

Construction

Layer by layer

Shown: NX-PVC-PiMF 4×2×1.0 mm² (IEC 60584-3) with 7-wire stranded NiCrSi (+) and NiSi (−) 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
1True Type NX thermocouple alloy conductorsPositive (+): Nicrosil (NiCrSi ~14.2 % Cr, 1.4 % Si, bal. Ni) · Negative (−): Nisil (NiSi ~4.4 % Si, 0.1 % Mg, bal. Ni), solid or 7-wire strandedTrue thermocouple alloys match Type N sensor EMF exactly over −25 °C to +200 °C
2Colour-coded core insulation105 °C HR-PVC, +90 °C XLPE, or +200 °C FEP (IEC: + Pink / − White; ANSI: + Orange / − Red)Maintains dielectric integrity and clear polarity identification
3Individual & collective Al/PET screensAluminium/PET laminated tape + 0.5 mm² tinned copper drain wire (OS or PiMF+OS)100 % electrostatic shielding against SCR/thyristor furnace noise
4Optional SWA or tinned copper braidUnarmoured, tinned copper braid screen, or Galvanised Steel Wire Armour (SWA)Mechanical protection around furnace shells and underground trenches
5Outer jacket (IEC Pink RAL 3015, ANSI 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

NX — IEC 60584-3 (Pink/White)

Positive (+) Pink, Negative (−) White, Outer Jacket Pink (RAL 3015)

NX — ANSI MC96.1 (Orange/Red)

Positive (+) Orange, Negative (−) Red, Outer Jacket Orange per ASTM E230

NX-FEP (+200 °C Furnace Head)

FEP fluoropolymer rated −60…+200 °C for direct termination at hot furnace heads

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on IEC 60584-3 / ANSI MC96.1 / ASTM E230. Values for your order are confirmed in the datasheet and quotation.

Electrical

Positive conductor (+)
Nicrosil (NiCrSi ~14.2 % Cr / 1.4 % Si / bal. Ni, non-magnetic, ~98 µΩ·cm)
Negative conductor (−)
Nisil (NiSi ~4.4 % Si / 0.1 % Mg / bal. Ni, non-magnetic, ~37 µΩ·cm)
Tolerance Class 1 (IEC 60584-3)
±1.5 °C (±39 µV) over −25 °C to +200 °C junction range
Tolerance Class 2 (IEC 60584-3)
±2.5 °C (±65 µV) over −25 °C to +200 °C junction range
Nominal Seebeck coefficient
≈ 27.7 µV/°C (0 to +100 °C) · loop R ≈ 1.35 Ω/m at 1.0 mm²

Thermal

Thermoelectric calibration range
−25 °C to +200 °C (true extension grade NX)
Insulation rating (by jacket type)
−25…+105 °C (HR-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) or solid
Min. bending radius
7.5 × OD (unarmoured) · 10 × OD (SWA armoured)

Resistance

Flame retardance
IEC 60332-1-2 & IEC 60332-3-24 Cat C
Magnetic & oxidation stability
Both legs non-ferromagnetic; immune to Type K short-range ordering

Reference standards

Thermocouple cable standard
IEC 60584-3, ANSI/ISA MC96.1 (ASTM E230) & AMS 2750
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 NX Type N thermocouple extension cable sizes

Single-pair and multi-pair (1P to 24P) PVC, XLPE/LSZH, FEP (+200 °C) and SWA armoured constructions.

Dimensions, construction & weights
Order designationConfigurationInsulation / SheathTemp. rangeOuter Ø ≈
mm		Weight ≈
kg/km		Min. bend R
fixed mm		Enquiry
NX Heat-Resistant PVC / PVC Screened (−25…+105 °C)
NX-PVC-OS 1×2×0.51×2×0.5 mm² (7/0.30)PVC / PVC (OS)−25…+105 °C5.64442
NX-PVC-PiMF 2×2×0.52×2×0.5 mm² (7/0.30)PVC / PVC (PiMF+OS)−25…+105 °C8.68464
NX-PVC-PiMF 4×2×0.54×2×0.5 mm² (7/0.30)PVC / PVC (PiMF+OS)−25…+105 °C10.814281
NX-PVC-PiMF 8×2×0.58×2×0.5 mm² (7/0.30)PVC / PVC (PiMF+OS)−25…+105 °C14.1246106
NX-PVC-PiMF 12×2×0.512×2×0.5 mm² (7/0.30)PVC / PVC (PiMF+OS)−25…+105 °C16.9348127
NX-PVC-OS 1×2×1.01×2×1.0 mm² (7/0.43)PVC / PVC (OS)−25…+105 °C6.76850
NX-PVC-PiMF 4×2×1.04×2×1.0 mm² (7/0.43)PVC / PVC (PiMF+OS)−25…+105 °C12.821296
NX-PVC-OS 1×2×1.51×2×1.5 mm² (7/0.53)PVC / PVC (OS)−25…+105 °C7.59256
NX-PVC-PiMF 4×2×1.54×2×1.5 mm² (7/0.53)PVC / PVC (PiMF+OS)−25…+105 °C14.3286107
NX High-Temperature FEP / FEP Screened (−60…+200 °C)
NX-FEP-OS 1×2×0.51×2×0.5 mm² (7/0.30)FEP / FEP (OS)−60…+200 °C4.63834
NX-FEP-PiMF 4×2×0.54×2×0.5 mm² (7/0.30)FEP / FEP (PiMF+OS)−60…+200 °C9.212869
NX-FEP-OS 1×2×1.01×2×1.0 mm² (7/0.43)FEP / FEP (OS)−60…+200 °C5.65842
NX XLPE / LSZH / SWA Armoured Direct-Burial (−40…+90 °C)
NX-XLPE-SWA 1×2×1.51×2×1.5 mm² (7/0.53)XLPE / SWA / LSZH−40…+90 °C12.1298121
NX-XLPE-SWA 4×2×1.54×2×1.5 mm² (7/0.53)XLPE / SWA / LSZH−40…+90 °C19.8745198
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Specify 'IEC' (+ Pink / − White) or 'ANSI' (+ Orange / − Red) colour coding and Class 1 (±1.5 °C) tolerance when ordering.

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 1)EMF deviation within ±1.5 °C (±39 µV) at +100 °C / +200 °CEvery 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 1 & Class 2 CertifiedANSI/ISA MC96.1 & AMS 2750 Pyrometry ReadyCE, RoHS 2 (2011/65/EU) & REACH

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX NX TYPE N EXTENSION <size> IEC 60584-3 CLASS 1 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

PDFNX Type N Thermocouple Extension Cable – technical datasheet14 sizes · construction, technical data, approvalsXLSXNX 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.

When should I specify true NX extension cable instead of NC compensating cable for Type N thermocouples?
Specify true NX extension cable (Nicrosil/Nisil conductors) whenever Class 1 accuracy (±1.5 °C) is required—such as AMS 2750 aerospace heat-treatment furnaces—or when the thermocouple head temperature swings below 0 °C or up to +200 °C with minimal gradient error. Specify NC compensating cable (Cu/CuNi) when Class 2 tolerance (±2.5 °C) is acceptable and lower loop resistance or lower cable cost is prioritised.
Can Type K extension cable (KX) be used on a Type N thermocouple?
Never. Type K has a Seebeck slope of ~40.6 µV/°C at +100 °C whereas Type N is ~27.7 µV/°C. Wiring a Type N sensor with KX cable introduces ~0.32 °C of error for every 1 °C difference between the connection head and the control room.
How do I distinguish the NiCrSi (+) and NiSi (−) conductors in NX cable?
Both legs are non-magnetic, so a magnet test cannot separate them. Instead, check the insulation colour (IEC: + Pink / − White; ANSI: + Orange / − Red) or measure DC resistance: the Positive (+ NiCrSi) wire has ~2.6 times the resistance of the Negative (− NiSi) wire (0.98 Ω/m vs 0.37 Ω/m at 1.0 mm²).
How should the screen and drain wire of NX 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 NX 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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NX Type N Thermocouple Extension Cable

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