H07RN-F Heavy-duty Flexible Rubber Cable EN 50525-2-21

H07RN-F heavy-duty flexible rubber cable complies with EN 50525-2-21 and carries a 450/750V rating. Two product series are available, including heavy-duty 1–5 core and heavy-duty multicore versions. EN 60228 Class 5 bare flexible copper serves as the conductor. EI4 cross-linked EPR forms the cable insulation. EM2 cross-linked chloroprene rubber makes up the outer sheath. This cable functions as power supply and control cable for portable equipment, delivering oil resistance, ozone resistance, flame retardancy and AD7 temporary immersion performance. Typical applications include construction sites and mobile agricultural machinery. Target clients are contractors and industrial purchasers located in Europe, Africa and the Middle East. Taitong Cable owns complete EN test certificates. As a leading direct manufacturer, Taitong Cable offers factory price and custom specifications. All clients are welcome to inspect the Taitong Neoprene Cable Factory.

Each cable has a standardised designation. The letters and numbers refer to the cable outer sheath, other outer sheath, the conductor class, the rated voltage and the final composition of the cable. In the case of H07RN-F, the letters stand for:

H: conforms to a harmonised standard.

07: rated voltage 450/750V.

R: EPR insulation.

N: polychloroprene (PCP) sheath.

F: flexible conductor (class 5).

Applications of H07RN-F 

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H07RN‑F is suitable for dry, humid or wet indoor spaces and temporary outdoor installation. It is NOT designed for permanent outdoor use or locations with explosive hazardous atmosphere.

Typical applications:

Portable electric tools, welding machines, portable lamps, heating plates and small electrical appliances

Mobile construction machinery, site portable motors & generators, temporary on-site power supply

Lifting equipment: crane reels, gantry grabs

Automated port AGV, stage equipment, mobile workshop power connection

CNC machine tool cable chains, oil rig power wiring, engine compartment wiring for engineering machinery

Water and aquaculture: outdoor pumping stations, submersible pumps, aquaculture aerators, fish and shrimp farms, deep wells

New energy: AC side wiring of photovoltaic inverters, temporary wiring for wind turbines

Mountain tower power cables, open-pit mines in frigid regions, dockyard temporary power

Agriculture and horticulture, agricultural mobile machinery, caravan and caravan parks

Notes:

Not suitable for permanent burial in soil or continuous long-term submersion in water. Not applicable for explosive hazardous zones.

Construction of H07RN-F 

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Conductor: Bare flexible copper wire, Class 5 (EN 60228), annealed

Insulation: Ethylene Propylene Rubber (EPR), type EI4 to EN 50363-1

Core: Twisted multi-cores (for two to five cores versions)

Filler: A centre filler may be used.

Outer sheath: Cross-linked chloroprene rubber (PCP/Neoprene), type EM2 to EN 50363-2-1 , black

For cables with a specified sheath thickness greater than 2,4 mm:

Two layers of sheath: with the inner layer made of one of the cross-linked elastomeric compounds type EM 2 or EM 3 to EN 50363-2-1 and the outer layer of the cross-linked elastomeric compound type EM 2 to EN 50363-2-1.

Sizes of cable 

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Single core: 1,5 mm² to 630 mm²;

2 and 5 core : 1,0 mm² to 95 mm² ;

3 and 4 core : 1,0 mm² to 300 mm².

6, 7, 12 and 18 core: 1,5mm²,4 mm²,2,5mm²；

24 and 36 core: 1,5 mm² and 2,5 mm².

Core Colours of H07RN‑F (EN 50525 / HD 186, VDE European standard) 

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1-core: Black

2-core: Brown, Blue

3G: Green/Yellow, Blue, Brown

4G: Green/Yellow, Brown, Black, Grey

5G: Green/Yellow, Blue, Brown, Black, Grey

6 cores and above: Black cores marked with white numerals, plus Green/Yellow earth core

Important rule:

The Green/Yellow core shall be used exclusively for the protective earth (PE) conductor and must not be used for live or neutral conductors.

Standard outer sheath colour: Black

Electrical Parameters of H07RN-F 

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Rated voltage: U₀/U = 450/750 V; 

Test voltage: 2500V/5 min. Its breakdown voltage is far higher than this value.

Voltage class: Suitable for single‑phase 230V or three‑phase 400V power frequency systems; not applicable for medium‑voltage systems above 10 kV.

Insulation resistance constant: At 20 ℃, insulation resistance shall be no less than 0.01 MΩ·km. 

This value directly reflects the purity and vulcanization degree of ethylene propylene rubber.

Advantages of H07RN-F 

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Ultra-flexible, high flex-fatigue resistance & long service life. Bending radius ≤6D. Free to bend, twist and drag, fits tight spaces and frequently moving equipment; no wire breakage or cracking in long-term use, anti-aging life ≥5 years.

Excellent weather tolerance, stable across temperature extremes. H07RN-F (Chinese Type: YCW) operates from -40℃ to +60℃. It resists hardening under outdoor sun and brittling in severe cold, perfect for cold rooms, construction sites and cold northern areas.

Conductor and Cross‑section

Conductor material: Class 5 or Class 6 soft annealed bare copper or tinned copper wires. Tinned copper improves oxidation resistance and solderability, recommended for humid outdoor applications.

Nominal cross‑section range: Commonly 1.0 mm² ~ 185 mm²; some suppliers offer up to 240 mm². Multi‑core constructions (2‑core, 3‑core, 4‑core, 5‑core) are mainstream; single‑core is also standard.

Construction requirement: To achieve “F” extra‑flex grade, the diameter of individual fine wire shall be strictly controlled below 0.21 mm, and the lay ratio shall comply with IEC 60228 requirements for flexible conductors.

Insulation and Sheath Materials

Insulation: Ethylene Propylene Rubber (EPR). It maintains adequate electrical clearance while delivering excellent flex resistance and thermal stability.

Sheath: Chloroprene Rubber (CR) is the mainstream compound; some formulations adopt Chlorosulphonated Polyethylene (CSP). It features flame retardancy, resistance to mineral oil, cutting fluid, UV and ozone — the key property for direct outdoor exposure.

Temperature range

Fixed installation: -40 ℃ minimum, suitable for winter construction in Northeast China and high‑altitude regions.

Mobile service: -25 ℃ minimum; maximum conductor temperature 90 ℃.

Minimum bending radius: 6 × cable outer diameter for mobile use; 4 × outer diameter for fixed installation. Superior to ordinary cables, ideal for repeated bending applications such as cable reels and drag chains.

Mechanical and Environmental Resistance

Flame retardancy: Complies with IEC 60332‑1‑2 single vertical flame propagation test. Custom options available for bunched fire test IEC 60332‑3.

Weathering resistance: Ozone resistance and xenon‑arc ageing test per UL 1581 or HD 22.4 are the benchmark criteria to verify genuine outdoor durability.

FAQ 

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Why is H07RN‑F considerably more expensive than domestic heavy-duty rubber cables?

The main reasons are the high raw material cost of EPR insulation and CR sheath. Production requires stringent flex-life and weathering tests. Certification and testing costs also push up unit price, yet it delivers lower failure rates over its full service life.

How to distinguish H07RN‑F from ordinary YCW rubber-sheathed cable?

Differentiation can be made by printed standard marking, sheath oil resistance and low-temperature bending performance. H07RN‑F complies with European standard EN 50525-2-21; it remains crack-free under mobile operation down to -25 ℃, with well-defined ageing data for mineral oil resistance. YCW follows GB/T 5013, and most versions only undergo routine inspection.

Which H07RN‑F sizes suit outdoor crane reels?

Common selections include 3×50mm²+1G25mm² or 4×35mm². Extra-flex"F-class" conductors are mandatory. For high-lift applications, tensile reinforcing filler is recommended. Ask your supplier for reference cases for reel service.

What is the low-temperature rating of H07RN‑F?

Minimum -40 ℃ for fixed installation; minimum -25 ℃ for mobile operation. Verify the sheath compound for extreme cold conditions. Standard YCW generally has a mobile low-temperature limit of -15 ℃ and cannot be a direct replacement.

Which core counts of H07RN‑F are most popular?

3-core, 4-core and 5-core are the most widely purchased in industry. The high-volume cross-section range runs from 1.5mm² to 70mm². 5-core versions (with protective earth and neutral conductors) are in high demand for variable-frequency drive equipment.

How to test whether the H07RN‑F sheath is oil-resistant?

Test by immersion in ASTM IRM 902 reference oil at 100 ℃ for 96 hours. The acceptance criteria: retained tensile strength ≥60% and retained elongation ≥60%. Requesting third-party oil-resistance test reports from the supplier is the most reliable approach.

What parameter is most often overlooked when purchasing H07RN‑F?

Minimum bending radius and bunched flame retardancy. For mobile installation, the available space must accommodate 6×OD bending radius. When routed in dense cable trays, clearly specify if IEC 60332-3 bunched fire performance is required.

Can H07RN‑F run submerged in water long‑term?

Standard H07RN‑F has no longitudinal water-blocking structure. For permanent underwater deployment, select modified versions with AD7 or higher submersion rating. Standard grade may be used for short-term rain exposure or shallow water with high-quality terminations, and anti-siphon protection shall be arranged at the shore entry point.

Which manufacturers can supply H07RN‑F in bulk?

Work directly with original factories holding valid VDE / TÜV certificates and continuous vulcanisation lines for CR rubber. Check certificate validity and production range; avoid intermediary traders without in-house testing capability.

Choose Taitong Cable as your first choice, supported by complete certificates and factory-direct pricing.

Taitong Cable, a leading Chinese cable manufacturer and supplier, delivers global cable solutions with outstanding advantages in rubber flexible cables. We operate a dedicated rubber cable plant, multiple production bases and regional offices nationwide. Our experienced R&D and testing team provides IEC type test reports, CE certificates and supports extra certification for international clients. We serve project purchasers and large cable warehousing & distribution partners.  H07RN-F, one of our core best-selling items, is your optimal choice for reliable flexible rubber cable sourcing.Our H07RN-F heavy duty flexible rubber cable is ideal for clients in Europe, Africa and Southeast Asia.