N2XY-J0.6/1 kVCu / XLPE / PVCPE includedIEC 60502Fixed distribution
N2XY-J — 0.6/1 kV XLPE/PVC Power Cable Engineering Guide
A technical English guide for engineers specifying N2XY-J power distribution cables for underground routes, cable ducts, concrete, outdoor plant, indoor switchboards, power stations and industrial networks. The article decodes the designation, reconstructs the physical cable layers, preserves the complete published reference matrix and separates reference, derived and project-confirmation values.
Rated voltage U0/U
0.6/1 kV
Conductor operating temperature
90°C
Short-circuit temperature
250°C
maximum 5 s in reference sheet
Minimum bending radius
15D / 12D
single-core / multicore
Contents
- Engineering position
- Designation decoding
- Application architecture
- Multicore cross-section
- Single-core cross-section
- Reference construction
- Complete matrix
- Derived handling values
- Electrical engineering
- Selection comparison
- Installation and acceptance
- FMEA
- Certification scope
- Source map
1. Engineering position: where N2XY-J belongs
N2XY-J is a fixed-installation low-voltage distribution cable. Its Cu/XLPE/PVC architecture is appropriate where the cable is routed in soil, water, concrete, buildings, ducts, industrial facilities and switchgear systems, provided the installation does not expose it to mechanical damage beyond the design basis. It is not automatically a drag-chain, festoon, vertical-reeling, mining reeling or torsion-rated cable.
Use N2XY-J when
The feeder is stationary or only handled during installation, the route can be supported or protected, and a protective conductor is required in the cable construction.
The feeder is stationary or only handled during installation, the route can be supported or protected, and a protective conductor is required in the cable construction.
Do not substitute it blindly when
The cable repeatedly reels, reverses, twists, runs over rollers, enters a drag chain or experiences impact, crushing or continuous axial tension.
The cable repeatedly reels, reverses, twists, runs over rollers, enters a drag chain or experiences impact, crushing or continuous axial tension.
What the J suffix controls
In the reference family, J denotes the version with a green/yellow protective conductor; O denotes the corresponding version without that protective conductor. The exact order designation must be confirmed for the conductor arrangement.
In the reference family, J denotes the version with a green/yellow protective conductor; O denotes the corresponding version without that protective conductor. The exact order designation must be confirmed for the conductor arrangement.
Why XLPE matters
The 90°C conductor limit permits a higher thermal operating envelope than PVC-insulated power cables, but ampacity remains installation-specific and must be calculated for the route.
The 90°C conductor limit permits a higher thermal operating envelope than PVC-insulated power cables, but ampacity remains installation-specific and must be calculated for the route.
2. N2XY-J designation decoding
| Code element | Engineering interpretation | Design consequence | Source status |
|---|---|---|---|
| N | German/European power-cable designation family | Use the complete type designation and applicable national marking; do not select by the first letter alone. | Designation practice |
| 2X | Cross-linked polyethylene insulation | Higher conductor operating temperature than PVC insulation; termination must be compatible with XLPE insulation. | Reference construction |
| Y | PVC outer sheath | Robust general-purpose oversheath, but not a low-smoke halogen-free sheath. | Reference construction |
| J | Protective conductor included | Green/yellow PE function must be bonded, tested and sized for the installation fault-current case. | Reference datasheet note |
| O | Protective conductor omitted | Shown only as the paired comparison family; it is not the requested N2XY-J variant. | Reference datasheet note |
| re / rm / sm | Round solid / round stranded / sector stranded conductor | Conductor form changes bending behaviour, outer diameter, termination preparation and cable weight. | Reference matrix |
3. Application architecture
Boundary condition: the diagram shows fixed distribution service. If the route contains repeated movement, the correct engineering decision is normally to change to a cable family designed for that motion rather than to increase N2XY-J conductor size.
4. N2XY-J multicore cross-section
The reference construction is an unarmoured Cu/XLPE/PVC cable: bare copper conductors, XLPE core insulation, concentric core assembly and a black PVC outer sheath. The diagram separates the green/yellow protective-conductor function from the phase conductors. It is a technical reconstruction for explanation, not a manufacturing drawing; exact lay length, filler geometry, insulation thickness and sheath thickness must be taken from the released Feichun construction sheet.
5. N2XY-J single-core cross-section
Single-core installations require additional system decisions: parallel conductors, phase spacing, cleat arrangement, magnetic-force control, thermal dissipation and the route’s short-circuit mechanical duty. The 15D value is a minimum bending rule from the reference sheet, not a complete parallel-cable installation design.
6. Reference construction and operating limits
Conductor
Bare copper, class 1 or class 2 according to the construction; the matrix identifies round solid (re), round stranded (rm) and sector stranded (sm).
Bare copper, class 1 or class 2 according to the construction; the matrix identifies round solid (re), round stranded (rm) and sector stranded (sm).
Insulation
Cross-linked polyethylene, compound type DIX3 in the published reference sheet; maximum conductor operating temperature +90°C.
Cross-linked polyethylene, compound type DIX3 in the published reference sheet; maximum conductor operating temperature +90°C.
Outer sheath
PVC, compound type DMV6/DMP2 in the published reference sheet; black sheath; no armour or screen is listed in that construction.
PVC, compound type DMV6/DMP2 in the published reference sheet; black sheath; no armour or screen is listed in that construction.
Electrical rating
U0/U = 0.6/1 kV; reference test voltage 4 kV; highest permissible AC system voltage is listed as 1.2 kV for three-phase systems.
U0/U = 0.6/1 kV; reference test voltage 4 kV; highest permissible AC system voltage is listed as 1.2 kV for three-phase systems.
Thermal envelope
Fixed installation −40°C to +70°C; flexible handling −5°C to +50°C; +250°C short-circuit conductor temperature for a maximum short-circuit duration of 5 s.
Fixed installation −40°C to +70°C; flexible handling −5°C to +50°C; +250°C short-circuit conductor temperature for a maximum short-circuit duration of 5 s.
Mechanical envelope
Maximum permissible tensile stress by the reference pulling method: 50 N/mm²; minimum radius 15D for single-core and 12D for multicore.
Maximum permissible tensile stress by the reference pulling method: 50 N/mm²; minimum radius 15D for single-core and 12D for multicore.
7. Complete published N2XY-J reference matrix
Data provenance: the 22 rows below reproduce the complete dimensional matrix in the linked HELUKABEL N2XY-J/N2XY-O reference sheet, dated 15 April 2015. J and O part numbers are retained to show the paired designation structure. These are published reference values, not silently asserted Feichun SAP codes, current prices or a project-specific Feichun release.
| Construction / conductor | J part no. | O part no. | Family group | Outer Ø approx. [mm] | Cu [kg/km] | Mass [kg/km] | Reference minimum radius | Data status |
|---|---|---|---|---|---|---|---|---|
| 1 x 16 re | 32850 | 32862 | single-core | 11.5 | 154.0 | 242.0 | 15D | published reference matrix |
| 1 x 25 rm | 32851 | 32863 | single-core | 12.5 | 240.0 | 362.0 | 15D | published reference matrix |
| 1 x 35 rm | 32852 | 32864 | single-core | 13.5 | 336.0 | 470.0 | 15D | published reference matrix |
| 1 x 50 rm | 32853 | 32865 | single-core | 15.5 | 480.0 | 620.0 | 15D | published reference matrix |
| 1 x 70 rm | 32854 | 32866 | single-core | 17.0 | 672.0 | 805.0 | 15D | published reference matrix |
| 1 x 95 rm | 32855 | 32867 | single-core | 19.0 | 912.0 | 1,108.0 | 15D | published reference matrix |
| 1 x 120 rm | 32856 | 32868 | single-core | 20.5 | 1,152.0 | 1,360.0 | 15D | published reference matrix |
| 1 x 150 rm | 32857 | 32869 | single-core | 23.0 | 1,440.0 | 1,670.0 | 15D | published reference matrix |
| 1 x 185 rm | 32858 | 32870 | single-core | 25.5 | 1,776.0 | 2,050.0 | 15D | published reference matrix |
| 1 x 240 rm | 32859 | 32871 | single-core | 28.5 | 2,304.0 | 2,635.0 | 15D | published reference matrix |
| 1 x 300 rm | 32860 | 32872 | single-core | 30.0 | 2,880.0 | 3,200.0 | 15D | published reference matrix |
| 1 x 400 rm | 32861 | 32873 | single-core | 34.0 | 3,840.0 | 4,150.0 | 15D | published reference matrix |
| 4 x 16 rm | 32874 | 32884 | multicore | 21.5 | 614.0 | 1,042.0 | 12D | published reference matrix |
| 4 x 25 rm | 32875 | 32885 | multicore | 26.0 | 960.0 | 1,640.0 | 12D | published reference matrix |
| 4 x 35 rm | 32876 | 32886 | multicore | 27.5 | 1,344.0 | 1,760.0 | 12D | published reference matrix |
| 4 x 50 sm | 32877 | 32887 | multicore | 30.0 | 1,920.0 | 2,350.0 | 12D | published reference matrix |
| 4 x 70 sm | 32878 | 32888 | multicore | 34.0 | 2,688.0 | 3,100.0 | 12D | published reference matrix |
| 4 x 95 sm | 32879 | 32889 | multicore | 39.0 | 3,648.0 | 4,250.0 | 12D | published reference matrix |
| 4 x 120 sm | 32880 | 32890 | multicore | 42.5 | 4,608.0 | 5,300.0 | 12D | published reference matrix |
| 4 x 150 sm | 32881 | 32891 | multicore | 47.5 | 5,760.0 | 6,400.0 | 12D | published reference matrix |
| 4 x 185 sm | 32882 | 32892 | multicore | 52.0 | 7,104.0 | 8,500.0 | 12D | published reference matrix |
| 4 x 240 sm | 32883 | 32893 | multicore | 58.0 | 9,216.0 | 11,000.0 | 12D | published reference matrix |
Commercial prices printed in the historical reference sheet are intentionally not reproduced: they are time-dependent, supplier-specific and not Feichun quotations. Dimensions, copper factor and mass are retained because they affect design, handling, logistics and mechanical support.
Feichun engineering design approach for N2XY-J
Controlled conductor geometry
Use re, rm or sm construction deliberately: conductor form affects termination, pulling behaviour, bending stiffness, outer diameter and the amount of copper that must be handled during installation.
Use re, rm or sm construction deliberately: conductor form affects termination, pulling behaviour, bending stiffness, outer diameter and the amount of copper that must be handled during installation.
Thermal design with discipline
Use the XLPE 90°C capability as a design input, not as a shortcut around derating. Feichun engineering selection should close the loop between conductor temperature, joint temperature, enclosure heat and protective-device settings.
Use the XLPE 90°C capability as a design input, not as a shortcut around derating. Feichun engineering selection should close the loop between conductor temperature, joint temperature, enclosure heat and protective-device settings.
PE-first safety logic
The J variant is selected when the protective-conductor function is required in the cable. Marking, continuity, bonding, fault-current capacity and disconnection time are treated as one protection chain.
The J variant is selected when the protective-conductor function is required in the cable. Marking, continuity, bonding, fault-current capacity and disconnection time are treated as one protection chain.
Application-matched upgrades
When the route becomes dynamic, screened, armoured, LSZH, mining or reel-driven, Feichun can move the project to the appropriate cable platform instead of overstating the capability of a standard fixed feeder.
When the route becomes dynamic, screened, armoured, LSZH, mining or reel-driven, Feichun can move the project to the appropriate cable platform instead of overstating the capability of a standard fixed feeder.
The differentiator is controlled application engineering: preserve the N2XY-J electrical architecture where it fits, and change the construction when the mechanical or fire-safety boundary changes.
8. Derived handling values for engineering checks
Single-core minimum radius ≈ 15 × outside diameter
Multicore minimum radius ≈ 12 × outside diameter
100 m cable mass = published mass [kg/km] × 0.1
100 m copper mass = published Cu factor [kg/km] × 0.1
Voltage drop: ΔU = I × R × L for DC / single-phase two-wire approximation
Three-phase voltage drop: ΔU ≈ √3 × I × R × L
Short-circuit verification: check I²t, conductor temperature, PE fault path and protective-device clearing timeDerived values are screening calculations. They do not replace the manufacturer’s released construction drawing, VDE 0298-4 installation calculation or project short-circuit study.
| Selected construction | Published outer Ø | Published radius rule | Derived minimum radius | Derived mass per 100 m | Derived copper per 100 m |
|---|---|---|---|---|---|
| 1 x 120 rm | 20.5 mm | 15D | 307.5 mm | 136.0 kg | 115.2 kg |
| 4 x 120 sm | 42.5 mm | 12D | 510.0 mm | 530.0 kg | 460.8 kg |
| 4 x 240 sm | 58.0 mm | 12D | 696.0 mm | 1100.0 kg | 921.6 kg |
9. Electrical engineering: current capacity and voltage drop
Current capacity is not one fixed cable number
It depends on conductor size, conductor arrangement, ambient temperature, installation medium, soil thermal resistivity, grouping, burial depth, ventilation and permissible conductor temperature. The public reference sheet provides dimensional data but does not publish a universal ampacity table for every installation condition.
It depends on conductor size, conductor arrangement, ambient temperature, installation medium, soil thermal resistivity, grouping, burial depth, ventilation and permissible conductor temperature. The public reference sheet provides dimensional data but does not publish a universal ampacity table for every installation condition.
XLPE does not remove derating
Although +90°C conductor operation is listed, the allowable continuous current must be limited by the weakest part of the system: insulation ageing, joints, glands, terminals, enclosure temperature or protective-device coordination.
Although +90°C conductor operation is listed, the allowable continuous current must be limited by the weakest part of the system: insulation ageing, joints, glands, terminals, enclosure temperature or protective-device coordination.
Voltage-drop control
Use the conductor resistance at the applicable temperature, route length and load power factor. For long feeders, check starting current and not only steady-state current.
Use the conductor resistance at the applicable temperature, route length and load power factor. For long feeders, check starting current and not only steady-state current.
Protective conductor
The J core is a fault-current path, not merely a colour. Verify PE continuity, cross-section, prospective fault current, disconnection time and bonding at both ends.
The J core is a fault-current path, not merely a colour. Verify PE continuity, cross-section, prospective fault current, disconnection time and bonding at both ends.
For a final design, calculate current capacity and voltage drop using the applicable local installation rules and the exact Feichun data sheet. Do not copy an ampacity from a different supplier, different conductor form or different installation method.
10. Selection comparison
| Requirement | N2XY-J | What the engineer must verify | Decision |
|---|---|---|---|
| Fixed underground / duct distribution | Strong fit for the reference application | Burial, water, soil heat, mechanical protection, joints and PE continuity | Suitable subject to calculation |
| Outdoor industrial feeder | PVC sheath and XLPE insulation provide a conventional LV distribution construction | UV/weather exposure, support, impact risk, gland and terminal compatibility | Suitable subject to environment review |
| Fire / smoke restricted building | Standard PVC sheath is not automatically LSZH | Reaction-to-fire class, smoke, acidity and halogen requirements of the project | Consider N2XH-J or another specified LSZH construction |
| Drag chain / continuous flexing | Not the default design basis | Cycle count, travel speed, torsion, bend radius and carrier geometry | Select a dedicated chain cable |
| Reel, crane or mining trailing | Not a substitute for a reeling/trailing cable | Axial load, torsion, roller contact, take-up, impact and dynamic fatigue | Select a dedicated reeling/trailing family |
| Protective conductor required | J version includes the green/yellow PE function in the reference designation | Exact PE arrangement and project fault-current calculation | Confirm the order code |
11. Installation and acceptance workflow
- Confirm the exact N2XY-J construction, conductor form, cross-section, outer diameter, sheath compound and released Feichun data sheet.
- Check the drum label, cable length, shipping damage, moisture ingress, sheath marks and end seals before pulling.
- Align the drum axis with the route; pay off without reverse winding, uncontrolled twist or flange impact.
- Use a pulling stocking or approved pulling method; keep the pulling load and sidewall pressure within the project method statement.
- Maintain at least 15D for single-core and 12D for multicore at bends, entries, glands and termination approaches unless the released data sheet requires more.
- Provide cleats, trays, ducts or other mechanical protection where impact, crushing, sharp edges, vehicles, water movement or construction traffic could damage PVC.
- Terminate the protective conductor, verify PE continuity and record torque, insulation resistance, phase identification and phase sequence.
- Before energisation, confirm protective-device settings, short-circuit withstand, voltage-drop result, sheath integrity and as-built route documentation.
12. Failure mode and effects analysis
Wrong cable family: N2XY-J is installed in a drag chain or reel; repeated movement fatigues the conductor and sheath.
Radius violation: a tight gland entry or trench corner locally kinks the cable below 12D/15D.
Pulling damage: excessive force or sidewall pressure damages the PVC sheath or shifts the core geometry.
PE discontinuity: the J core is not correctly terminated, leaving the protection path incomplete.
Thermal overrating: a current table from air is applied to soil, grouped ducts or a hot enclosure without derating.
Fire-class mismatch: standard PVC is specified where LSZH or a project reaction-to-fire class is mandatory.
Reference code error: a historical J/O part number is copied into a current Feichun purchase order without manufacturer confirmation.
Single-core system error: parallel single-core cables are installed with incorrect phase spacing or magnetic cleat design.
13. Feichun Cable certification and project assurance
Engineered for maximum safety in demanding environments, Feichun Cable cable systems comply with global standards including ATEX, IECEx, VDE, CE, UKCA, EAC, and the Russian Fire Safety Certificate. They are the trusted choice for heavy-duty mining equipment, ship-to-shore cranes, RTG/RMG cranes, and conveyor systems where high reliability is non-negotiable.
For an N2XY-J release
Confirm the exact conductor form, XLPE compound, PVC sheath compound, voltage, thermal limits, reaction-to-fire declaration, test report and marking before production release.
Confirm the exact conductor form, XLPE compound, PVC sheath compound, voltage, thermal limits, reaction-to-fire declaration, test report and marking before production release.
Certification is configuration-specific
The company-level certification scope does not make every N2XY-J construction automatically ATEX, IECEx, EAC or fire-certified. The certificate package must match the exact product, market and installation.
The company-level certification scope does not make every N2XY-J construction automatically ATEX, IECEx, EAC or fire-certified. The certificate package must match the exact product, market and installation.
Feichun engineering value
Feichun can use the N2XY-J designation logic as a controlled low-voltage distribution platform while preserving the option to move to a dedicated flexible, mining, reeling, LSZH or screened construction when the service condition requires it.
Feichun can use the N2XY-J designation logic as a controlled low-voltage distribution platform while preserving the option to move to a dedicated flexible, mining, reeling, LSZH or screened construction when the service condition requires it.
14. Source map and data-status audit
| Source | Use in this article | Status and limitation |
|---|---|---|
| HELUKABEL N2XY-J / N2XY-O reference PDF | Complete 22-row dimensional matrix; construction, voltage, temperatures, test voltage, tensile stress, radius and J/O notes. | Published reference sheet dated 15 April 2015; not a Feichun order matrix. |
| HELUKABEL current N2XY-J / N2XY-O family page | Current family context and product filtering by core count, cross-section, PE and conductor construction. | Supplier-specific product page; current Feichun product release must be confirmed independently. |
| IEC 60502-1:2021 | International scope for extruded-insulation 1 kV and 3 kV fixed-installation power cables. | Standard text is controlled by IEC; the article does not reproduce normative clauses. |
| DIN VDE 0276-603 / HD 603 reference record | Explains the European/German distribution-cable reference used by the product sheet. | Displayed VDE record is historical/withdrawn; always verify the applicable current edition for the contract. |
| EU Low Voltage Directive 2014/35/EU | Market-access context for electrical equipment and cables within the directive voltage range. | Market compliance still depends on the exact product declaration and jurisdiction. |
This article is for preliminary engineering, search and technical comparison. The complete reference matrix is preserved, but exact Feichun N2XY-J dimensions, current capacity, test reports, certificates, marking, prices and delivery configuration must be confirmed against the current production data sheet.
