H07Z-U Cable Solid Copper LSZH Conduit Wire

What is H07Z-U Cable?

The H07Z-U cable is a harmonized European-standard single-core unsheathed panel wire and conduit cable rated for 450/750V service, featuring a Class 1 solid plain copper conductor and cross-linked halogen-free polymer insulation complying with EN 50525-3-41, DIN VDE 0282, and HD 22.1/9. It is specifically engineered for internal wiring in dry, clean environments, including control desks, switchgear cabinets, and lighting luminaires where enhanced thermal endurance and non-toxic fire performance are mandatory.

Designed to mitigate hazards in occupied spaces and mission-critical electrical rooms, the cable utilizes an LSZH insulation compound capable of continuous operation at +90°C. During a fire, it limits flame spread under IEC/EN 60332-1-2, eliminates corrosive acid gas emissions per IEC/EN 60754-1/2, and maintains high visibility per IEC/EN 61034-1/2, preventing damage to sensitive control components and safeguarding evacuation routes.

H07Z-U Cable Construction

• Conductor: Class 1 solid plain annealed copper conductor per IEC/EN 60228 and DIN VDE 0295, delivering high electrical conductivity and stable terminal clamping.
• Insulation: Low Smoke Zero Halogen (LSZH) thermosetting rubber-type compound rated for continuous operation up to +90°C.
• Bedding / Inner Layer: Not applicable (single-core unsheathed hook-up wire design).
• Screen / Armour: Unscreened and unarmoured lightweight construction optimized for pulling through conduits, trunking, and closed ducts.
• Outer Sheath: Not applicable (single-layer extruded LSZH insulation functions as the outer protective barrier).
• Core Identification: Complete solid colour options: Yellow, Red, Black, Blue, Orange, White, Green/Yellow, Grey, Brown, Violet, and Pink.
• Sheath Colour: Available in the specified single insulation colours to facilitate phase and circuit identification.

Applications

H07Z-U single-core cables are engineered for internal connection, equipment manufacturing, and commercial electrical distribution where life-safety fire standards demand zero-halogen emissions and low smoke production. They are suitable for fixed installation in clean, dry environments inside closed ducts, protective conduits, and surface-mounted raceways.

• Control Panels & Switchgear: Fixed internal wiring between terminal blocks, circuit breakers, and relays in low-voltage distribution assemblies.
• Conduit & Duct Wiring: Surface-mounted or embedded protective conduits in commercial complexes, hospitals, and educational facilities.
• Lighting Luminaires: Internal wiring for commercial lighting fixtures and emergency signs operating at conductor temperatures up to +90°C.
• Public Infrastructure & Data Centers: Sub-distribution circuitry in transit stations, airports, and server rooms requiring zero halogen emissions.

Specifications & Dimensions

The H07Z-U cable series encompasses nominal conductor cross-sections of 1.5mm², 2.5mm², 4mm², 6mm², and 10mm² with minimum overall diameters ranging from 2.6mm up to 5.3mm, maximum overall diameters from 3.3mm up to 6.6mm, and nominal weights spanning 18 kg/km to 103 kg/km. Operating at a rated voltage of 450/750V, the cable supports a maximum continuous conductor operating temperature of +90°C, a short-circuit limit of 250°C, and a minimum installation laying temperature of 5°C, manufactured in strict compliance with EN 50525-3-41 and DIN VDE 0282-1/9/300.

Standards

Design & Harmonization Standards: EN 50525-1, EN 50525-3-41, IEC/EN 60228, IEC 60245-2, DIN VDE 0282-1/9/300, DIN VDE 0295, VDE 0298-4, EN 50395, EN 50396, HD 22.1/9, HD 308, HD 383, HD 516
Flame Retardancy: IEC/EN 60332-1-2 (Single cable vertical flame test)
Halogen-Free & Smoke Emission: IEC/EN 60754-1/2 (Zero Halogen Acid Gas), IEC/EN 61034-1/2 (Low Smoke Density)
Voltage Rating (Uo/U): 450/750V
Temperature Spectrum: Max Conductor Operating Temp: +90°C; Max Conductor Short-Circuit Temp: 250°C; Min Installation Temp: 5°C
Regulatory Compliance: European Regulation EN 50575 (CPR Compliant), Low Voltage Directive 2014/35/EU, CE Marked, RoHS Directive 2015/65/EU, REACH EC 1907/2006

Frequently Asked Questions

Q: What is the main distinction between H05Z-U and H07Z-U cables?
A: H05Z-U is rated for 300/500V service across smaller cross-sections (0.5mm² to 1.0mm²), whereas H07Z-U is rated for higher voltages of 450/750V across larger conductor cross-sections from 1.5mm² up to 10mm².

Q: What does the letter ‘U’ designate in the H07Z-U harmonized code?
A: In CENELEC harmonization codes, ‘U’ specifies a Class 1 solid copper conductor, which provides a rigid form-retaining shape ideal for permanent conduit and panel routing.

Q: Can H07Z-U single-core cable be installed in wet areas or directly outdoors?
A: No, H07Z-U is designed specifically for protected internal installations in clean, dry environments inside enclosed equipment, distribution boards, or conduit systems.

Q: What payment terms does Huadong Cable accept for international export shipments?
A: We accept standard international commercial payment terms, including Telegraphic Transfer (T/T, 30% advance deposit and 70% against shipping documents) and 100% Irrevocable Letter of Credit (L/C) at sight.

H07Z-U – Why Choose Huadong Cable?

Huadong Cable Group manufactures H07Z-U low-smoke zero-halogen single-core cables in strict compliance with EN 50525-3-41 and DIN VDE 0282 standards, verified through rigorous testing for conductor DC resistance, +90°C insulation thermal endurance, and IEC/EN 60332-1-2 flame retardancy. Utilizing high-purity oxygen-free Class 1 solid plain copper conductors, our extrusion lines apply thermosetting LSZH insulation to deliver uniform wall thickness and clean stripping characteristics for fast terminal connections. With zero halogen acid gas emissions per IEC/EN 60754, our cables deliver electrical safety in modern public and commercial installations.

With more than 20 years of precision cable engineering expertise, Huadong Cable Group operates fully automated wire drawing, annealing, and halogen-free polymer extrusion 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 coil and carton packaging, and reliable door-to-port logistics for switchboard builders, electrical contractors, and OEM manufacturers worldwide.