NHXMH-J Cable
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NHXMH-J Halogen-Free Cable – LSZH Installation Cable with Enhanced Fire Performance (DCA)
The NHXMH-J is a high-quality halogen-free (LSZH) power and installation cable rated 300/500 V according to DIN VDE 0250-214. It serves as a modern, safer alternative to traditional NYM-J cables when superior fire safety, low smoke emission, and reduced toxicity are required. In the event of fire, this cable produces minimal smoke and no corrosive halogen gases, significantly improving evacuation conditions and protecting sensitive equipment and building structures.
Key Benefits of NHXMH-J Halogen-Free Cable for Professionals
Designed for fixed installations, the NHXMH-J offers excellent mechanical strength, easy handling, and outstanding fire performance. It is ideal for dry, damp, and wet environments as well as outdoor use when protected from direct sunlight. Its low-smoke zero-halogen (LSZH) construction minimizes risks to human life and valuable assets in high-occupancy or high-value installations.
- Low smoke density and no corrosive or toxic gases during combustion
- Improved fire behavior with DCA classification under CPR (Construction Products Regulation)
- High mechanical robustness and long-term reliability
- Suitable for buildings with strict fire safety and evacuation requirements
- Environmentally friendlier and more recyclable due to halogen-free materials
Construction of the NHXMH-J Cable
The cable features solid or stranded round copper conductors (Class 1 up to 10 mm², Class 2 for larger sizes). Each core is insulated with cross-linked polyethylene (XLPE) and a halogen-free compound. Cores are laid up with halogen-free filler, and the outer sheath is a grey halogen-free thermoplastic polymer compound (type HM2) that provides additional mechanical protection and superior fire characteristics. Core identification follows DIN VDE 0293-308 (with green-yellow protective earth in NHXMH-J version).
Applications of NHXMH-J Halogen-Free Cable
This cable is recommended wherever enhanced fire safety is critical — especially in public, commercial, and industrial buildings with high concentrations of people or valuable equipment.
For Electrical Contractors and Professional Electricians
Perfect for fixed wiring of lighting, power outlets, and distribution boards in commercial and public buildings. It helps meet stringent VDE, CPR, and building code requirements for fire safety.
For Construction and Renovation Companies
Ideal for new builds and refurbishment projects in apartments, offices, schools, and hospitals. The halogen-free design ensures compliance with modern safety standards during major renovations.
For Industrial Companies and Facilities
Widely used in production halls, warehouses, power plants, and transformer stations to reduce downtime risks from fire and protect expensive machinery from corrosive smoke damage.
For Research Centers and Laboratories
In sensitive environments such as labs and R&D facilities, the low smoke and non-corrosive properties safeguard high-value measuring instruments and ensure personnel safety.
For Van Conversion and Camper Van Builders
Excellent choice for safe 230 V fixed installations in motorhomes and camper vans. It provides maximum reliability and safety in confined spaces, even under varying humidity conditions.
Technical Specifications of NHXMH-J Cable
| Feature | Description |
|---|---|
| Standard | DIN VDE 0250-214 |
| Rated Voltage | 300/500 V |
| Conductor | Bare copper, solid (Class 1) or stranded (Class 2) |
| Insulation | Cross-linked polyethylene (XLPE) with halogen-free compound |
| Sheath | Halogen-free thermoplastic polymer, grey |
| Installation | Fixed installation in dry, damp or wet locations; on, in or under plaster; in masonry and concrete (not vibrated, tamped or prestressed concrete); outdoor when protected from direct sunlight |
| Fire Performance | Enhanced fire behavior, low smoke, no corrosive gases (DCA class under CPR) |
Common Cross-Sections and Approximate Outer Diameters:
| Cross-Section | Cores | Approx. Outer Diameter |
|---|---|---|
| 3 × 1.5 mm² | 3G | 8.5 – 9.7 mm |
| 5 × 1.5 mm² | 5G | 10.0 – 11.5 mm |
| 3 × 2.5 mm² | 3G | 9.5 – 10.8 mm |
| 5 × 2.5 mm² | 5G | 11.0 – 12.5 mm |
| 1 × 6 mm² | 1 | 6.4 – 10.4 mm |
| 1 × 16 mm² | 1 | 8.5 – 12.6 mm |
NHXMH-J vs NYM-J – Why Choose the Halogen-Free Option?
Unlike standard NYM-J cables with PVC insulation and sheath (which can release corrosive hydrochloric acid gases in a fire), the NHXMH-J uses XLPE insulation and a fully halogen-free LSZH sheath. This results in significantly lower smoke production, no acid formation, better visibility during evacuation, and reduced damage to electronics and building infrastructure — making it the preferred choice for safety-critical projects.
Frequently Asked Questions about NHXMH-J Halogen-Free Cable (FAQ)
What does NHXMH-J mean?
NHXMH-J stands for a halogen-free (H) sheathed (M) installation cable with cross-linked (X) polyethylene insulation, improved fire performance, and a protective earth conductor (J). It is the modern, low-smoke zero-halogen alternative to conventional PVC cables.
Where can the NHXMH-J cable be installed?
It is approved for fixed installation on, in, or under plaster, in masonry, and in concrete (except vibrated, tamped, or prestressed concrete). Suitable for dry, damp, and wet rooms as well as protected outdoor applications. Not intended for direct burial or underground use without additional protection.
Why is halogen-free construction important?
In a fire, halogen-free cables produce far less smoke and no corrosive or toxic halogen gases. This improves escape possibilities, protects human health, and prevents damage to sensitive equipment and structural steel from acid corrosion.
In which types of buildings is NHXMH-J particularly recommended?
It is ideal for hospitals, schools, kindergartens, hotels, theaters, airports, railway stations, high-rise buildings, shopping malls, industrial plants, data centers, and research facilities — anywhere high occupant safety or asset protection is required.
Is the installation similar to NYM-J cable?
Yes, the handling and termination are comparable. The NHXMH-J can be stripped and installed with standard tools and offers good mechanical robustness thanks to its special sheath compound.
Is NHXMH-J suitable for industrial applications?
Absolutely. It is frequently used in factories, warehouses, and process plants because it reduces fire-related risks and protects valuable production equipment from secondary damage caused by smoke and corrosion.
Can NHXMH-J be used in van conversions and motorhomes?
Yes. It is an excellent solution for safe 230 V fixed wiring in campers and vans, offering high reliability and fire safety even in limited spaces and under changing environmental conditions.
Does the NHXMH-J cable comply with current building regulations?
Yes. It meets European CPR requirements (typically Dca class) and supports compliance with national building codes for fire safety in electrical installations.
What is the expected service life of the NHXMH-J cable?
Thanks to high-quality materials and robust construction, it provides a very long service life typical of professional-grade installation cables in buildings.