H05Z-U Cable

What is H05Z-U Cable?

The H05Z-U cable is a harmonized European-standard, single-core unsheathed hook-up and panel wire rated for 300/500V service, featuring a Class 1 solid plain copper conductor and cross-linked halogen-free polymer insulation conforming to EN 50525-3-41 and DIN VDE 0282. It is specifically engineered for protected internal wiring inside clean, dry environments such as control desks, lighting luminaires, and electrical enclosures where enhanced thermal and fire safety performance is required.

Unlike conventional PVC-insulated single-core wires, H05Z-U uses a low-smoke zero-halogen insulation system that withstands elevated conductor temperatures up to +90°C and prevents the emission of corrosive halogen acid gases during thermal decomposition. In the event of an electrical fault or fire, the cable limits flame propagation per IEC/EN 60332-1-2, eliminates dense toxic smoke per IEC/EN 61034-1/2, and prevents acid-gas corrosion to sensitive electronics, ensuring maximum equipment protection and personnel safety in modern public and commercial installations.

H05Z-U Cable Construction

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

Applications

H05Z-U cables are engineered for internal connection, equipment manufacturing, and building automation where life-safety fire requirements 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 Cabinets: Fixed point-to-point wiring between terminal blocks, relays, and circuit breakers in low-voltage control cubicles.
• Lighting Luminaires & Fixtures: Internal supply leads for architectural lighting and emergency exit signs operating under elevated operating temperatures up to +90°C.
• Public Buildings & Data Centers: Low-voltage internal wiring in airports, rail stations, hospitals, and server facilities requiring IEC/EN 60754 zero-halogen compliance.
• Industrial Equipment & Appliances: Internal connections in clean industrial machinery, measurement units, and HVAC equipment requiring solid core terminations.

Specifications & Dimensions

The H05Z-U cable portfolio comprises single-core solid copper wire sizes including 0.5mm², 0.75mm², and 1.0mm², with overall outer diameters ranging from a minimum of 1.9mm (0.5mm²) up to a maximum of 2.8mm (1.0mm²) and nominal cable weights spanning 7.1 kg/km to 12.1 kg/km. Operating at a rated voltage of 300/500V, 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 alignment with European standards 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 vertical wire test)
Halogen-Free & Low Smoke: IEC/EN 60754-1/2 (Zero Halogen Acid Gas), IEC/EN 61034-1/2 (Low Smoke Density)
Voltage Rating (Uo/U): 300/500V
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 primary difference between H05Z-U and H05Z-K cables?
A: The letter ‘U’ in H05Z-U designates a Class 1 solid copper conductor for rigid, stay-in-place panel wiring, whereas the letter ‘K’ in H05Z-K indicates a Class 5 flexible stranded conductor designed for installations subject to dynamic bending and high flexibility requirements.

Q: Can H05Z-U single-core cable be installed in wet areas or directly outdoors?
A: No, H05Z-U is specifically engineered for internal wiring in clean, dry environments inside enclosed equipment, distribution cabinets, or protective conduits; it is not approved for direct outdoor exposure or wet conditions.

Q: What is the allowable conductor operating temperature for H05Z-U wire?
A: The cable is rated for continuous conductor operating temperatures up to +90°C, and it can withstand short-circuit conditions up to 250°C, provided the installation temperature does not fall below 5°C.

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, with 30% advance deposit and 70% against shipping documents) and 100% Irrevocable Letter of Credit (L/C) at sight.

H05Z-U Cable – Why Choose Huadong?

Huadong Cable Group manufactures H05Z-U low-smoke zero-halogen panel wires in strict compliance with EN 50525-3-41 and DIN VDE 0282 standards, verified through testing for conductor DC resistance, +90°C insulation endurance, and IEC/EN 60332-1-2 flame retardancy. Utilizing high-purity oxygen-free Class 1 solid plain copper conductors, our automated lines apply advanced LSZH insulation to deliver uniform wall thickness, smooth surface finishing, and stripped ends for terminal connections. Combined with zero-halogen compounding that prevents corrosive acid emissions per IEC/EN 60754, our cables deliver electrical reliability for modern distribution panels and lighting systems.

With more than 20 years of precision cable engineering expertise, Huadong Cable Group operates fully automated wire drawing, continuous annealing, and halogen-free polymer extrusion facilities certified to ISO 9001, CE, CPR (EN 50575), RoHS, and REACH protocols. By eliminating intermediary markups, we provide competitive factory-direct pricing, 100% routine Mill Test Certificates (MTC) tested in accredited facilities, customized spool packaging in carton drums or shrink-wrapped coils, and seamless door-to-port logistics for switchboard builders, OEM manufacturers, and electrical contractors worldwide.