What is N2XH Enhanced Flex FRNC-LSZH Cable?
The N2XH Enhanced Flex FRNC-LSZH Cable is a low-voltage, unarmoured, flexible power cable rated for AC 0.6/1kV (DC 0.9/1.8kV) service, manufactured with Class 5 fine stranded plain copper conductors, XLPE insulation, an extruded LSZH-FRNC inner bedding layer, and an LSZH-FRNC outer protective jacket conforming to VDE 0276 Part 604, HD 604 S1, and EN 60228 standards. It is officially certified by KEMA Laboratories under standard KEMA K42C-1-5 and verified by BSI under the Cable Batch Verification Kitemark™ KM 662509.
Unlike standard N2XH cables that utilize rigid Class 1 solid or Class 2 stranded conductors, the Enhanced Flex design incorporates high-strand-count Class 5 flexible copper conductors, reducing the fixed installation bending radius to 6 times the overall diameter. This enables pulling and termination within compact switchboards, tight ductwork, and congested cable trays. In the event of fire, its halogen-free, non-corrosive compound eliminates acidic fumes (IEC 60754-1/2) and produces low smoke density (IEC 61034-1/2), ensuring that personnel evacuation routes and sensitive electronic control assets remain protected.
N2XH Enhanced Flex FRNC-LSZH Cable Construction
- Conductor: Class 5 fine stranded annealed plain copper conductor conforming to EN 60228, providing dynamic flexibility and reduced bending effort during installation.
- Insulation: Cross-Linked Polyethylene (XLPE) compound offering dielectric endurance, low dielectric losses, and continuous thermal performance up to +90°C.
- Bedding / Inner Layer: Extruded Low Smoke Zero Halogen Flame Retardant Non-Corrosive (LSZH-FRNC) compound providing a round profile and mechanical cushioning.
- Screen / Armour: Unarmoured, lightweight flexible profile designed for ease of installation in trays, ducts, and conduits.
- Outer Sheath: UV-resistant and ozone-resistant (EN 50396), abrasion-resistant (EN 60229-4.1) LSZH-FRNC thermoplastic compound.
- Core Identification: 1-core: Black; 2-core: Blue, Brown; 3-core including earth: Blue, Brown, Green/Yellow; 4-core including earth: Brown, Black, Grey, Green/Yellow; 5-core including earth: Brown, Black, Grey, Blue, Green/Yellow.
- Sheath Colour: Black or Blue.
Applications
N2XH Enhanced Flex FRNC-LSZH cables are designed for primary electricity supply in low-voltage distribution networks where tight bending radii, zero-halogen emissions, and low smoke density are required. They are suitable for fixed surface mounting, installation on cable trays, routing inside conduits, pulling through ducts, or underground deployment when provided with additional mechanical protection.
- Public Infrastructure & Commercial Facilities: Sub-main feeders in airports, railway hubs, underground metro stations, hospitals, and educational campuses.
- Industrial Distribution & Control Centers: Power runs inside switchgear cubicles, motor control centers (MCC), and industrial production plants.
- Tight Enclosures & Cable Ducts: Dense cable pathways, risers, and duct banks where flexible Class 5 conductors facilitate routing around structural obstacles.
- Hazardous & Intrinsically Safe Environments: Dedicated blue outer sheath option used to identify auxiliary signaling and intrinsically safe circuits in chemical and process facilities.
Specifications & Dimensions
The N2XH Enhanced Flex cable series encompasses single-core configurations from 1.5mm² up to 630mm², 2-core cables from 1.5mm² to 400mm², 3-core cables from 1.5mm² to 400mm², 4-core cables from 1.5mm² to 400mm², 5-core cables from 1.5mm² to 300mm², and 7-core configurations in 6mm² and 10mm² sizes. Operating at an AC rated voltage of 0.6/1kV (DC 0.9/1.8kV) with a test voltage of 3.5kV, the cable supports fixed installations across a temperature spectrum of -40°C to +90°C and maintains a compact minimum bending radius of 6 times the overall diameter. Conductor DC resistance values at 20°C span from 13.3 Ω/km for 1.5mm² down to 0.0287 Ω/km for 630mm² conductors, with current-carrying capacities in air reaching up to 1200A for single-core flat layouts and 724A for multi-core runs, with all nominal overall diameters ranging from 5.4mm up to 80.8mm manufactured in strict alignment with HD 604 S1 and VDE 0276-604 dimensional tolerances.
| NO. OF CORES | NOMINAL CROSS SECTIONAL AREA mm2 | NOMINAL DIAMETER OF CONDUCTOR mm | NOMINAL THICKNESS OF INSULATION mm | NOMINAL THICKNESS OF SHEATH mm | NOMINAL OVERALL DIAMETER mm | NOMINAL WEIGHT kg/km |
| 1 | 1.5 | 1.6 | 0.7 | 0.92 | 5.4 | 66 |
| 1 | 2.5 | 2 | 0.7 | 0.92 | 5.8 | 70 |
| 1 | 4 | 2.5 | 0.7 | 0.92 | 6.3 | 74 |
| 1 | 6 | 3 | 0.7 | 0.92 | 6.8 | 95 |
| 1 | 10 | 4.1 | 0.7 | 0.92 | 7.9 | 138 |
| 1 | 16 | 5.25 | 0.7 | 0.92 | 9.1 | 199 |
| 1 | 25 | 6.6 | 0.9 | 0.92 | 10.8 | 288 |
| 1 | 35 | 7.5 | 0.9 | 0.92 | 11.7 | 381 |
| 1 | 50 | 9.25 | 1 | 0.92 | 13.7 | 526 |
| 1 | 70 | 11.2 | 1.1 | 0.92 | 15.8 | 720 |
| 1 | 95 | 12.5 | 1.1 | 1 | 17.3 | 941 |
| 1 | 120 | 14 | 1.2 | 1 | 19 | 1183 |
| 1 | 150 | 15.75 | 1.4 | 1.08 | 21.4 | 1456 |
| 1 | 185 | 18.2 | 160 | 1.12 | 24.2 | 1807 |
| 1 | 240 | 20 | 1.7 | 1.16 | 26.4 | 2295 |
| 1 | 300 | 23.1 | 1.8 | 1.16 | 29.7 | 2846 |
| 1 | 400 | 26.4 | 2 | 1.16 | 33.4 | 3681 |
| 1 | 500 | 29.7 | 2 | 1.24 | 37.3 | 4720 |
| 1 | 630 | 33 | 2 | 1.56 | 41.2 | 6176 |
| 2 | 1.5 | 1.6 | 0.7 | 1.24 | 10 | 147 |
| 2 | 2.5 | 2 | 0.7 | 1.24 | 10.8 | 179 |
| 2 | 4 | 2.5 | 0.7 | 1.24 | 11.8 | 226 |
| 2 | 6 | 3 | 0.7 | 1.24 | 12.8 | 281 |
| 2 | 10 | 4.1 | 0.7 | 1.24 | 15.2 | 412 |
| 2 | 16 | 5.25 | 0.7 | 1.24 | 17.5 | 577 |
| 2 | 25 | 6.6 | 0.9 | 1.24 | 21.4 | 858 |
| 2 | 35 | 7.5 | 0.9 | 1.24 | 23.2 | 1092 |
| 2 | 50 | 9.25 | 1 | 1.24 | 27.1 | 1503 |
| 2 | 70 | 11.2 | 1.1 | 1.24 | 31.6 | 2045 |
| 2 | 95 | 12.5 | 1.1 | 1.4 | 34.8 | 2643 |
| 2 | 120 | 14 | 1.2 | 1.48 | 38.6 | 3318 |
| 2 | 150 | 15.75 | 1.4 | 1.56 | 43.7 | 4146 |
| 2 | 185 | 18.2 | 1.6 | 1.64 | 49.8 | 5215 |
| 2 | 240 | 20 | 1.7 | 1.8 | 54.2 | 6491 |
| 2 | 300 | 23 | 1.8 | 1.8 | 60.8 | 8079 |
| 2 | 400 | 26 | 2 | 2.04 | 67.6 | 10390 |
| 3 | 1.5 | 1.6 | 70 | 1.24 | 10.5 | 165 |
| 3 | 2.5 | 2 | 0.7 | 1.24 | 11.3 | 206 |
| 3 | 4 | 2.5 | 0.7 | 1.24 | 12.4 | 266 |
| 3 | 6 | 3 | 0.7 | 1.4 | 13.5 | 337 |
| 3 | 10 | 4.1 | 0.7 | 1.48 | 16.1 | 503 |
| 3 | 16 | 5.25 | 0.7 | 1.56 | 18.6 | 718 |
| 3 | 25 | 6..60 | 0.9 | 1.64 | 22.7 | 1071 |
| 3 | 35 | 7.5 | 0.9 | 1.24 | 24.7 | 1388 |
| 3 | 50 | 9.25 | 1.1 | 1.24 | 29.1 | 1919 |
| 3 | 70 | 11.2 | 1.1 | 1.32 | 34 | 2603 |
| 3 | 95 | 12.5 | 1.1 | 1.4 | 37.2 | 3423 |
| 3 | 120 | 14 | 1.2 | 1.48 | 41.2 | 4316 |
| 3 | 150 | 15.75 | 1.4 | 1.64 | 46.9 | 5397 |
| 3 | 185 | 18.2 | 1.6 | 1.72 | 53.4 | 6761 |
| 3 | 240 | 20 | 1.7 | 1.88 | 57.9 | 8483 |
| 3 | 300 | 23 | 1.8 | 2.04 | 65.3 | 10583 |
| 3 | 400 | 26 | 2 | 2.24 | 73.2 | 13671 |
| 4 | 1.5 | 1.6 | 0.7 | 1.24 | 11.3 | 193 |
| 4 | 2.5 | 2 | 0.7 | 1.24 | 12.2 | 243 |
| 4 | 4 | 2.5 | 1.1 | 1.24 | 13.4 | 320 |
| 4 | 6 | 3 | 0.7 | 1.24 | 14.6 | 411 |
| 4 | 10 | 4.1 | 0.7 | 1.24 | 17.5 | 620 |
| 4 | 16 | 5.25 | 0.7 | 1.24 | 20.3 | 895 |
| 4 | 25 | 6.6 | 0.9 | 1.24 | 24.9 | 1340 |
| 4 | 35 | 7.5 | 0.9 | 1.24 | 27.3 | 1752 |
| 4 | 50 | 9.25 | 1 | 1.32 | 32 | 2449 |
| 4 | 70 | 11.2 | 1.1 | 1.4 | 37.4 | 3379 |
| 4 | 95 | 12.5 | 1.1 | 1.48 | 41.2 | 4387 |
| 4 | 120 | 14 | 1.2 | 1.64 | 45.9 | 5561 |
| 4 | 150 | 15.75 | 1.4 | 1.72 | 51.9 | 7091 |
| 4 | 185 | 18.2 | 1.6 | 1.88 | 59.2 | 8681 |
| 4 | 240 | 20 | 1.7 | 2.04 | 64.4 | 10919 |
| 4 | 300 | 23 | 1.8 | 2.2 | 72.6 | 13618 |
| 4 | 400 | 26 | 2 | 2.28 | 80.8 | 17511 |
| 5 | 1.5 | 1.6 | 0.7 | 1.24 | 12.3 | 213 |
| 5 | 2.5 | 2 | 0.7 | 1.24 | 13.4 | 278 |
| 5 | 4 | 2.5 | 1.1 | 1.24 | 14.7 | 377 |
| 5 | 6 | 3 | 0.7 | 1.24 | 16.2 | 509 |
| 5 | 10 | 4.1 | 0.7 | 1.24 | 19.3 | 743 |
| 5 | 16 | 5.25 | 0.7 | 1.24 | 22.4 | 1075 |
| 5 | 25 | 6.6 | 0.9 | 1.24 | 27.5 | 1657 |
| 5 | 35 | 7.5 | 0.9 | 1.32 | 30.1 | 2154 |
| 5 | 50 | 9.25 | 1 | 1.4 | 35.6 | 3002 |
| 5 | 70 | 11.2 | 1.1 | 1.48 | 41.6 | 4121 |
| 5 | 95 | 12.5 | 1.1 | 1.64 | 45.9 | 5390 |
| 5 | 120 | 14 | 1.2 | 1.72 | 50.9 | 6782 |
| 5 | 150 | 15.75 | 1.4 | 1.88 | 57.5 | 8515 |
| 5 | 185 | 18.2 | 1.6 | 2.04 | 65.8 | 10679 |
| 5 | 240 | 20 | 1.7 | 2.2 | 71.6 | 13602 |
| 5 | 300 | 23 | 1.8 | 2.24 | 80.2 | 16906 |
| 7 | 6 | 3.1 | 0.7 | 1.24 | 19 | 675 |
| 7 | 10 | 4.1 | 0.7 | 1.24 | 22 | 1005 |
Standards
Design & Testing Standards: VDE 0274 Part 604, VDE 0276 Part 604, HD 604 S1, IEC 60364, EN 60228, EN 62230, DIN VDE 0100, CEI 20-60, NEN 1010, NF C15-100
Third-Party Accreditations: KEMA Approved to KEMA K42C-1-5 (35mm² to 300mm² up to 5 cores); BSI Cable Batch Verification Kitemark™ (KM 662509)
Flame Retardancy: IEC 60332-1-2 (Single cable vertical test), IEC 60332-3-24 (Bunched vertical fire test)
Halogen-Free & Smoke Emission: IEC 60754-1/2 (Zero Halogen Acid Gas), IEC 61034-1/2 (Low Smoke Opacity)
Environmental & Mechanical Performance: EN 50396 (Ozone and UV Resistance), EN 60229-4.1 (Abrasion Resistance)
Voltage & Temperature Ratings: AC Uo/U: 0.6/1kV, DC Uo/U: 0.9/1.8kV, Test Voltage: 3.5kV; Fixed Temperature: -40°C to +90°C; Bending Radius: 6 × overall diameter
Regulatory Compliance: European Regulation EN 50575 (CPR Compliant), Low Voltage Directive 2014/35/EU, CE Marked, RoHS Directive 2015/65/EU, REACH Directive EC 1907/2006
Frequently Asked Questions
Q: What makes the N2XH Enhanced Flex cable different from conventional N2XH cables?
A: Standard N2XH cables utilize rigid Class 1 solid or Class 2 stranded conductors requiring a bending radius of 10 to 15 times the outer diameter, whereas N2XH Enhanced Flex features Class 5 fine stranded copper conductors that deliver enhanced flexibility and allow a tight 6× overall diameter bending radius.
Q: What does the KEMA K42C-1-5 approval certify for this cable?
A: KEMA approval from the Netherlands confirms that the cable has undergone independent testing validating its electrical insulation integrity, mechanical durability, and fire performance standards for European industrial and utility installations.
Q: Can N2XH Enhanced Flex cable be installed in underground applications?
A: The cable is suitable for underground industrial applications provided additional mechanical protection is installed, such as placing the cable within protective conduits, ducts, or concrete troughs, because it is unarmoured.
Q: What payment terms does Huadong Cable accept for international project supply orders?
A: We accept standard international commercial payment terms, including Telegraphic Transfer (T/T, with 30% advance deposit and 70% against shipping documents) and 100% Irrevocable Letter of Credit (L/C) at sight.
N2XH Enhanced Flex Cable – Why Choose Huadong?
Huadong Cable Group manufactures N2XH Enhanced Flex FRNC-LSZH power cables in strict compliance with VDE 0276 Part 604 and HD 604 S1 standards, verified by comprehensive routine and type testing. Utilizing high-purity oxygen-free Class 5 flexible plain copper conductors, our automated extrusion lines apply precision XLPE insulation to deliver dielectric strength, thermal stability from -40°C to +90°C, and a tight 6× overall diameter bending radius. Finished with extruded LSZH-FRNC bedding and a UV-, ozone-, and abrasion-resistant outer jacket, our cables deliver mechanical durability, zero toxic acid emissions, and fire safety in critical infrastructure.
With more than 20 years of precision cable engineering expertise, Huadong Cable Group operates multi-wire drawing machines, bunched stranding equipment, continuous extrusion lines, and testing facilities certified to ISO 9001, CE, CPR (EN 50575), RoHS, and REACH protocols. By supplying directly from our manufacturing base, we offer competitive factory pricing, 100% Mill Test Certificates (MTC) tested in accredited testing facilities, customized continuous drum lengths packaged on ISPM 15 heat-treated export wooden reels, and seamless door-to-port logistics for EPC contractors and infrastructure builders worldwide.
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AboutHuaDong
Established in 1999, Huadong Cable Group is a national high-tech enterprise and an integrated manufacturer specializing in advanced cable R&D, production, and global trade. Deeply integrated into global infrastructure and the Belt and Road Initiative, Huadong Cable Group exports to over 130 countries and regions worldwide, including Europe, South America, North America, the Middle East, Africa, Asia, and Oceania.
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Our comprehensive product includes high-quality power cables, aerial insulated cables (ABC cables), marine cables, flame-retardant & fire-resistant cables, and low-smoke halogen-free (LSZH) cables. We also specialize in rubber cables, high-temperature resistant cables, instrument & control cables, solar/photovoltaic cables, and customized wiring solutions for diverse industrial applications.
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