What Is H07RN-F Cable?

H07RN-F is a heavy-duty flexible power cable with rubber insulation and a robust rubber outer sheath, commonly used where cables are moved frequently and exposed to mechanical abuse or harsh surroundings. Here is what the code:

• H: Harmonized Type (Complies with European standards HAR).
• 07: 450/750 V rated voltage (U₀/U)
• R: Insulation is EPR (Ethylene Propylene Rubber).
• N: Sheath is PCP (Polychloroprene/Neoprene).
• F: Flexible copper conductor (Class 5).

Construction and Materials

A cable that performs “well enough on paper” can still fail early in the field if material selection and process control are weak. For H07RN-F, the most meaningful differences are usually in compound quality, layer adhesion, and dimensional consistency. We manufacture our H07RN-F strictly according to DIN VDE 0282 Part 4 and IEC 60245-4.

1) Conductor: Flexible Stranded Copper

Most H07RN-F designs use Class 5 flexible stranded copper. The conductor class affects bending performance and fatigue life, especially for cables that are reeled daily or moved between locations.

2) Insulation: Rubber System for Heat and Flexing

Rubber insulation systems used for this cable family are selected to remain stable under thermal cycling and repeated bending. Practically, that means the insulation is less likely to become brittle compared with some commodity materials when exposed to heat, flexing, and time.

Engineer’s Note: our EPR insulation handles operating temperatures from -25°C to +60°C (and up to +85°C for fixed installations). In short-circuit conditions, this insulation can withstand up to 200°C for a few seconds without fusing.

3) Outer Sheath: Heavy-Duty Rubber for Abrasion and Weather

The outer sheath is the “front line” against abrasion, scuffing, impact, oil splashes, and outdoor exposure. For buyers, this is where two suppliers can differ significantly even when both claim “H07RN-F.” Compound quality, extrusion control, and sheath thickness consistency strongly influence service life.

H07RN-F Cable Specification

For the engineer needing quick reference on core counts and electrical properties

(Note: We stock common sizes from H07RN-F 3G1.5mm2 up to 5G25mm2. Custom cores available upon request.)

H07RN-F cable Ampacity & Derating Factors

Note to Engineers: The most common failure mode I see is not the cable itself, but improper calculation of thermal dissipation.

While the standard defines the base current rating (Ampacity) at 30°C ambient air temperature, real-world industrial environments are rarely standard. You must apply the following Derating Factors (K) to ensure safety.

1. Temperature Correction Factors

If your ambient temperature exceeds 30°C, apply these multipliers:

2. Multi-Layer Coiling (The Drum Effect)

Critical Warning: When H07RN-F is used on cable reels, the layers of cable insulate each other, trapping heat.

1 Layer: Factor 0.85

2 Layers: Factor 0.65

3 Layers: Factor 0.45

Expert Insight: Never operate high-load equipment with the cable fully wound on the drum. The induction heating can melt the inner layers even if the outer layer feels cool.

What is H07RN-F cable used for?

H07RN-F is versatile, but it excels in specific “Hostile Environments.”

1. Submersible Applications

While standard rubber cables are rated AD7 (temporary immersion), our premium compounds are tested to AD8. This allows for permanent submersion in fresh water up to 10 meters depth, making them ideal for industrial dewatering pumps.

Limitation: For deeper water, salt water, or long-term underwater installations, a dedicated submersible cable design may be more appropriate than a general heavy-duty flexible rubber cable.

2. Renewable Energy

Renewable Energy (Wind) In wind turbines, the cable loop twists ±700 degrees. Our improved sheath adhesion prevents “corkscrewing” (where cores twist inside the jacket), a common failure in standard cables.

3. Hazardous Areas

Hazardous Areas While not explosion-proof itself, the flame-retardant properties make H07RN-F suitable for temporary power in Zone 1/2 environments, provided it is protected against direct mechanical crushing.

Comparison: H07RN-F vs. Alternatives

Many buyers confuse H07RN-F with H05VV-F (PVC), assuming they are interchangeable. However, for industrial applications, the performance gap is massive. For a comprehensive breakdown of technical parameters, please refer to our full guide on Rubber Cables Specification & Type Comparisons with PVC.

The fundamental distinction lies in the molecular chemistry. As we detail in our engineering note on What is the Difference Between Thermoplastics and Thermosets, PVC is a thermoplastic material, meaning it softens and eventually melts when heated. In contrast, H07RN-F is a thermoset elastomer—its cross-linked structure ensures it remains stable and will not melt, even under the extreme thermal stress of a short circuit.

The “Pro” Verdict: Stick to H07RN-F for 90% of temporary power and connection needs. Switch to Polyurethane (H07BQ-F) only if mechanical abrasion (scraping) is the primary failure mode on your site.

Field Notes

1. The “Curing Sweet Spot” (Why Our Jacket Doesn’t Crack): The difference between a sheath that tears and one that lasts is the vulcanization time. Many factories rush this to save energy, resulting in rubber that is either too soft (gummy) or too brittle. I monitor our Continuous Vulcanization (CV) lines to hit the exact chemical “sweet spot.” This ensures our PCP/Neoprene sheath cures fully, providing the maximum abrasion resistance needed when you drag the cable over rough concrete or gravel.

2. Tighter Stranding Pitch: The “lay length” (twist tightness) of the strands dictates lifespan. If the strands are too loose, they snap when the cable is twisted or reeled. We tighten our stranding pitch slightly more than the standard requirement. While this consumes more copper, it ensures the H07RN-F survives constant reeling, unrolling, and vibration without suffering internal conductor fatigue.

3. Residue-Free Stripping: We strictly control the dosage of the release agent between the sheath and insulation. This ensures the outer jacket peels away smoothly without leaving stuck rubber fragments or excessive powder on the inner cores. The result is a clean surface that is ready for immediate termination, eliminating the need for your team to scrape or clean the insulation before connecting.

Ready to secure your supply chain? Contact our engineering team for a quote or technical consultation today.