NHXH-FE180/E90 Fire Resistant Cable

What is NHXH-FE180/E90 Cable?

The NHXH-FE180/E90 Cable is a low-voltage, unarmoured halogen-free fire-survival power and control cable constructed with Class 1 solid (RE) or Class 2 stranded (RM) copper conductors, ceramic-forming flame-barrier LSZH insulation, an extruded LSZH inner sheath, and an orange LSZH outer jacket complying with DIN VDE 0266 and DIN VDE 0276-604 standards. Operating at a rated voltage of 0.6/1kV, it delivers FE 180 insulation integrity under IEC 60331 exposure and E 90 functional system circuit integrity under DIN 4102-12 installation testing.

Unlike standard unarmoured PVC or LSZH wiring cables, the NHXH design features high-temperature mineral-barrier taping and specialized ceramifying polymer compounds that form a hard, non-conductive ash shell when exposed to intense flame, preventing phase-to-phase and phase-to-ground flashover. The halogen-free thermoplastic outer jacket emits zero toxic halogen acid gases and negligible smoke during combustion, preserving visibility in escape corridors and protecting sensitive electronic control systems from acid damage in enclosed facilities.

NHXH-FE180/E90 Cable Construction

• Conductor: Class 1 solid plain copper conductor (RE) for smaller cross-sections, or Class 2 stranded plain circular copper conductor (RM) for larger cross-sections per EN 60228.
• Fire Barrier: High-temperature flame-protecting wrapping applied over each copper conductor to maintain dielectric isolation during fire events.
• Insulation: Cross-linked mineral-filled Low Smoke Zero Halogen (LSZH) compound rated for continuous operation up to +90°C.
• Inner Sheath: Extruded Low Smoke Zero Halogen (LSZH) bedding encasing the assembled core bundle to ensure roundness and mechanical cushioning.
• Screen / Armour: Unarmoured and unscreened construction optimized for routing within certified fire-rated support raceways and trays.
• Outer Sheath: Flame-retardant, UV-stabilized Low Smoke Zero Halogen (LSZH) thermoplastic compound complying with IEC/EN 60332-3-24 bunched cable vertical flame testing.
• Core Identification: 3 cores: Brown, Blue, Green/Yellow; 4 cores: Brown, Black, Grey, Green/Yellow; 5 cores: Brown, Black, Grey, Blue, Green/Yellow; 7 cores and above: Black with White numbers.
• Sheath Colour: Safety Orange.

Applications

NHXH-FE180/E90 Safety Cables are designed for indoor installations across facilities where high levels of fire protection, minimal smoke generation, and continuous 90-minute operational circuit integrity are required. They are not suitable for direct burial in the ground or continuous submersion in water.

• Emergency Ventilation & Smoke Spill Systems: Delivering sustained power to high-temperature stairwell pressurization fans, smoke exhaust dampers, and extraction systems.
• Firefighting & Sprinkler Water Pumps: Power circuits linking backup generators directly to booster pumps and deluge suppression networks.
• Evacuation Lifts & Emergency Power Supplies: Operating firefighter lifts, automatic door release mechanisms, and emergency evacuation lighting networks.
• High-Density Public Facilities: Critical sub-distribution power feeds in hospitals, mass transit terminals, road tunnels, data centers, and multi-story commercial buildings requiring zero toxic acid emissions.

Specifications & Dimensions

The NHXH-FE180/E90 cable portfolio encompasses single-core configurations from 16mm² up to 300mm², multi-core power configurations (2-core to 5-core, including split neutral/earth layouts such as 35/16mm² up to 120/70mm²), and control configurations up to 12 cores. Conductor cross-sections span from 1.5mm² to 300mm² supporting continuous clipped-direct current ratings up to 783A (2-core in air) and 703A (3-core in air). Operating at a rated voltage of 0.6/1kV, it supports service temperatures from -5°C to +90°C, maintaining a minimum bending radius of 12 times the overall diameter for solid conductors (RE) and 15 times the overall diameter for stranded conductors (RM). Overall outer diameters span from 10.5mm on single-core 16mm² up to 53mm on 4-core 150mm² cables, with nominal weights ranging from 250 kg/km up to 7,725 kg/km, adhering strictly to DIN VDE tolerances.

Standards

Design & Construction Standards: DIN VDE 0266, DIN VDE 0276-604, DIN VDE 0472-814, EN 60228
Fire & Circuit Integrity: Insulation Integrity FE 180 (IEC 60331 for 180 minutes); System Circuit Integrity E 90 (DIN 4102-12 for 90 minutes)
Flame Retardancy: IEC/EN 60332-3-24 (Category C bunched cable vertical flame spread), IEC 60331
Operating Temperature: -5°C to +90°C
Minimum Bending Radius: 12 × OD for Class 1 solid (RE); 15 × OD for Class 2 stranded (RM)
Regulatory Compliance: European Regulation EN 50575, Low Voltage Directive 2014/35/EU, CE Marked, RoHS Directive 2015/65/EU, REACH EC 1907/2006

Frequently Asked Questions

Q: What is the primary constructional difference between NHXH and NHXCH fire-resistant cables?
A: NHXH is an unscreened fire-resistant cable, whereas NHXCH incorporates a concentric conductor layer made of helical copper wires with a counter-helix copper tape that functions as an electrostatic screen and heavy-duty earth/neutral (PE/PEN) conductor.

Q: What is the practical requirement to maintain E 90 system circuit integrity during installation?
A: To achieve full DIN 4102-12 E 90 circuit integrity, the cable must be installed using certified fire-rated support hardware, including tested steel cable trays, fire-rated metal clamps, and approved anchor fixings spaced according to the standard.

Q: Can NHXH-FE180/E90 cable be laid directly into outdoor soil or wet underground trenches?
A: No, NHXH cables are specifically designed for dry, damp, or wet indoor environments; they are not rated for direct underground burial or installation in water unless routed inside sealed, watertight conduit systems.

Q: What international commercial payment terms does Huadong Cable accept?
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.

NHXH-FE180/E90 Cable – Why Choose Huadong Cable?

Huadong Cable Group manufactures NHXH-FE180/E90 safety cables in strict adherence to DIN VDE 0266 and DIN 4102-12 standards, verified through rigorous testing for conductor resistance, IEC 60331 insulation integrity, and IEC/EN 60332-3-24 bunched cable flame propagation. Utilizing high-purity oxygen-free Class 1 solid and Class 2 stranded plain copper conductors, our automated extrusion lines apply mineral-barrier flame tape and ceramifying LSZH insulation to deliver stable current ratings up to +90°C. Encased within an extruded LSZH bedding and a high-grade orange thermoplastic jacket, our cables maintain uninterrupted circuit operation and emit zero corrosive acid gases during building fires.

With more than 20 years of precision cable engineering expertise, Huadong Cable Group operates advanced multi-core cabling and halogen-free compounding facilities certified to ISO 9001, CE, CPR (EN 50575), RoHS, and REACH protocols. By eliminating intermediary markups, we deliver competitive factory-direct pricing, 100% routine Mill Test Certificates (MTC) tested in accredited testing facilities, continuous lengths on ISPM 15 heat-treated export wooden reels, and seamless door-to-port logistics for EPC contractors and life-safety engineering projects worldwide.