NSSHÖU vs H07RN-F vs H07RN8-F Heavy-Duty Rubber Cables: 5GM5 Tear Resistance, AD8 Submersion, and Voltage Rating Compared

By TEBAOFLEX Jyen, Senior Cable Application Specialist at TEBAOFLEX. Reviewed by the TEBAOFLEX Engineering Review Board. Updated on October 22, 2026.

TL;DR: Although NSSHÖU, H07RN-F, and H07RN8-F all look like black or yellow flexible rubber cables on a reel, substituting one for another causes two of the most expensive failures in industrial maintenance: rock-crush short circuits on quarry floors and RCD earth-leakage trips in submerged pump sumps. Choose NSSHÖU Heavy-Duty Rubber Cable (DIN VDE 0250-812, 0.6/1 kV, 90 °C 3GI3 EPR + 5GM5 double sheath) for high-abrasion mining, tunnelling, and 690 V machinery (24.6 kN crush resistance, TEBAOFLEX Lab, 2026). Choose H07RN-F Heavy-Duty Rubber Cable (EN 50525-2-21, 450/750 V, EM2 sheath) for general 400 V workshop, stage, and AD7 splash-zone tools. Choose H07RN8-F Submersible Rubber Cable or 0.6/1 kV screened S1BC4N8-F Submersible Rubber Cable (max. 6.4 mg/cm2 water absorption, TEBAOFLEX Lab, 2026) whenever the cable stays permanently underwater (AD8).

Comparison at a Glance: NSSHÖU vs. H07RN-F vs. H07RN8-F vs. S1BC4N8-F Selection Matrix

This head-to-head comparison equips electrical engineers and procurement managers with hard mechanical, dielectric, and hydrostatic benchmarks across the four primary models in our Heavy-Duty Rubber Cable Category.

Comparison Criterion.

Primary Product Page.

• NSSHÖU (DIN VDE 0250-812).: NSSHÖU Heavy-Duty Rubber Cable.
• H07RN-F (EN 50525-2-21).: H07RN-F Heavy-Duty Rubber Cable.
• H07RN8-F (EN 50525-2-21 AD8).: H07RN8-F Submersible Rubber Cable.
• S1BC4N8-F (0.6/1 kV Screened AD8).: S1BC4N8-F Screened Submersible Cable.

Nominal Voltage (U₀/U).

• NSSHÖU (DIN VDE 0250-812).: 0.6/1 kV AC (max 1.2 kV).
• H07RN-F (EN 50525-2-21).: 450/750 V AC (600/1000V fixed).
• H07RN8-F (EN 50525-2-21 AD8).: 450/750 V AC (Pump power/control).
• S1BC4N8-F (0.6/1 kV Screened AD8).: 0.6/1 kV AC (VFD pump feeder).

Insulation & Max Temp.

• NSSHÖU (DIN VDE 0250-812).: 3GI3 EPR (90 °C continuous).
• H07RN-F (EN 50525-2-21).: EI4 EPR (60 °C standard).
• H07RN8-F (EN 50525-2-21 AD8).: Hydrophobic EI4 EPR (60 °C / 85 °C).
• S1BC4N8-F (0.6/1 kV Screened AD8).: 3GI3 / HEPR (90 °C + Cu braid).

Sheath Construction.

• NSSHÖU (DIN VDE 0250-812).: Double: GM1b inner + 5GM5 outer.
• H07RN-F (EN 50525-2-21).: Single: EM2 polychloroprene.
• H07RN8-F (EN 50525-2-21 AD8).: Hydrophobic EM2 (AD8 formulation).
• S1BC4N8-F (0.6/1 kV Screened AD8).: Double: inner + 5GM5 / EM2 AD8.

Tear Strength (VDE 0472).

• NSSHÖU (DIN VDE 0250-812).: 18.5 N/mm (min 15.0 N/mm).
• H07RN-F (EN 50525-2-21).: 8.1 N/mm (min 7.5 N/mm).
• H07RN8-F (EN 50525-2-21 AD8).: 10.4 N/mm (min 7.5 N/mm).
• S1BC4N8-F (0.6/1 kV Screened AD8).: 16.2 N/mm (Heavy pump duty).

Water Rating (IEC 60364).

• NSSHÖU (DIN VDE 0250-812).: AD7 (Shallow immersion / wet tunnel).
• H07RN-F (EN 50525-2-21).: AD7 (Intermittent splash only).
• H07RN8-F (EN 50525-2-21 AD8).: AD8 (Continuous 10 m to 100 m).
• S1BC4N8-F (0.6/1 kV Screened AD8).: AD8 (Continuous 100 m / 10 bar).

Water Uptake (70°C x 14d).

• NSSHÖU (DIN VDE 0250-812).: 9.8 mg/cm2 (TEBAOFLEX Lab, 2026).
• H07RN-F (EN 50525-2-21).: 21.5 mg/cm2 (Saturates in sumps).
• H07RN8-F (EN 50525-2-21 AD8).: 6.4 mg/cm2 (Hydrophobic barrier).
• S1BC4N8-F (0.6/1 kV Screened AD8).: 5.2 mg/cm2 (Autoclave verified).

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Boundary 1: Why H07RN-F Fails in Quarry Slurry and 690V Mining Equipment (NSSHÖU vs. H07RN-F)

For a basic overview of standard H07RN-F cordage, see our introductory guide: What Is H07RN-F Cable?. While H07RN-F Heavy-Duty Rubber Cable is an excellent 450/750 V flexible cord for stage lighting, mobile generators, and light construction site tools, it suffers three structural deficits when deployed on quarries, cement plants, or tunnel jobsites:

1. 450/750 V vs. 0.6/1 kV Insulation Thickness: Modern quarry crushers, mobile screening plants, and tunnel ventilation fans operate at 690 V AC (or 1,000 V AC). Under EN 50525-2-21, H07RN-F is rated 450/750 V for flexible trailing duty (its 0.6/1 kV allowance applies only when enclosed inside fixed conduits). NSSHÖU Heavy-Duty Rubber Cable is natively rated 0.6/1 kV (max 1.2 kV AC) for unprotected mobile dragging.
2. 60 °C EI4 vs. 90 °C 3GI3 Thermal Ceiling: Standard H07RN-F uses EI4 rubber rated for a 60 °C maximum conductor temperature. In a 45 °C summer quarry or tunnel heading, H07RN-F loses 29% of its current capacity (derating factor 0.71), whereas 90 °C NSSHÖU retains 87% (derating factor 0.87, DIN VDE 0298-4).
3. Single EM2 Sheath vs. Dual GM1b + 5GM5 Rock Shield: In DIN ISO 4649 rotating drum abrasion tests, 5GM5 on NSSHÖU loses only 92 mm3 of volume compared to 165 mm3 for standard EM2 on H07RN-F (44% less wear, TEBAOFLEX Lab, 2026).

Tracking replacement logs across 19 open-pit aggregate quarries and tunnel sites from 2023 to 2026 revealed that 4G25 mm2 H07RN-F feeders dragged over blasted rock averaged only 11 months of service life before rock cut-through, whereas 4G25 mm2 NSSHÖU feeders averaged 42 months (3.8x longer service life, lowering 5-year total cable cost by 58%, TEBAOFLEX Field Audit, 2026).

Core Engineering Definitions for Industrial & Submersible Rubber Cables

To clarify the exact regulatory and chemical boundaries between surface trailing cables and underwater pump cables, we define four essential terms below:

• H07RN-F heavy-duty rubber cable is a harmonized 450/750 V flexible rubber cable built to EN 50525-2-21 (formerly VDE 0282-4), featuring Class 5 bare or tinned copper conductors, 60 °C EI4 EPR insulation, and a single EM2 polychloroprene outer sheath rated for medium mechanical stress and AD7 intermittent water immersion.
• H07RN8-F submersible rubber cable is the AD8 permanent-water-submersion derivative of H07RN-F under EN 50525-2-21. It uses a low-water-absorption hydrophobic EM2 polychloroprene sheath and moisture-stabilized EI4 EPR insulation designed for continuous operation on submersible sewage, drainage, and slurry pumps down to 10 m (EN standard) and 100 m (TEBAOFLEX factory autoclave qualification).
• S1BC4N8-F 0.6/1 kV screened submersible cable is a heavy-duty 0.6/1 kV submersible pump power and VFD feeder cable combining 90 °C EPR insulation, a tinned copper wire braid screen (C4) for inverter EMC and earth-fault protection, and an AD8 deep-submersion polychloroprene sheath (N8).
• AD7 vs. AD8 external water classification is the IEC 60364-5-51 environmental code distinguishing AD7 (shallow, intermittent water flooding up to 1 m where H07RN-F is permitted) from AD8 (continuous, permanent submersion under hydrostatic head > 1 m where H07RN8-F or S1BC4N8-F is mandatory).

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Boundary 2: Why H07RN-F Trips Submersible Pump RCD Breakers Under Water (H07RN8-F & S1BC4N8-F vs. H07RN-F)

A widespread field mistake in mine dewatering, civil cofferdams, and municipal wastewater plants is splicing standard H07RN-F onto a submersible drainage pump (such as Flygt, Tsurumi, or KSB). Within 30 to 90 days of continuous immersion at 5 m to 30 m depth (0.5 to 3.0 bar), the pump trips its 30 mA or 300 mA residual current device (RCD) even though the outer jacket shows zero physical cuts.

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Here is why standard H07RN-F fails underwater and how H07RN8-F Submersible Rubber Cable and S1BC4N8-F Screened Submersible Cable prevent osmotic leakage:

1. Osmotic Water Uptake in Standard EM2 Recipes: Standard EM2 polychloroprene uses zinc-oxide curing systems and hydrophilic mineral fillers that absorb 21.5 mg/cm2 of water in 14-day 70 °C gravimetric immersion tests (IEC 60811-402, TEBAOFLEX Lab, 2026). Under 2 bar to 10 bar hydrostatic pressure, water molecules permeate through the sheath and condense at the EI4 core boundary, dropping insulation resistance (Riso) from 820 MOhm.km down to 1.2 MOhm.km.
2. Hydrophobic AD8 Compounding in H07RN8-F: Our H07RN8-F replaces hydrophilic fillers with silane-coupled calcined clay and red-lead-free hydrophobic metal-oxide crosslinkers, cutting 70 °C gravimetric water absorption to 6.4 mg/cm2 (well below the 10.0 mg/cm2 threshold, TEBAOFLEX Lab, 2026).
3. 0.6/1 kV Screened Upgrade (S1BC4N8-F) for VFD Dewatering Pumps: When deep mine dewatering pumps (> 37 kW) run on VFD variable speed drives or 690 V networks, 450/750 V unscreened H07RN8-F is no longer sufficient. Specifying S1BC4N8-F 0.6/1 kV Screened Submersible Cable (or unscreened S1BN8-F 0.6/1 kV Submersible Cable) provides a 0.6/1 kV dielectric wall, 10 bar (100 m) depth rating, and an 85% tinned copper braid screen (C4) to block PWM bearing currents. For deep-well autoclave testing rules, see our Submersible Pump Cable AD7/AD8 Testing Guide.

View full-size duty benchmark

NSSHÖU vs H07RN8-F vs H07RN-F Duty Benchmark. grouped bar data: NSSHÖU 0.6/1kV: Crush (kN) 24.6, Life (Months) 42, Water (mg/cm2) 9.8; S1BC4N8-F 1kV: Crush (kN) 21, Life (Months) 38, Water (mg/cm2) 5.2; H07RN8-F AD8: Crush (kN) 15.4, Life (Months) 32, Water (mg/cm2) 6.4; H07RN-F AD7: Crush (kN) 13.2, Life (Months) 11, Water (mg/cm2) 21.5.Source: TEBAOFLEX Mechanical & Autoclave Lab (4G25 mm2) 2026.

Source: TEBAOFLEX Mechanical & Autoclave Lab (4G25 mm2), 2026.

Side-by-Side 4G25 mm2 Mechanical, Electrical & Hydrostatic Test Data

Using our testing method and test setup on 4G25 mm2 production samples of NSSHÖU, S1BC4N8-F, H07RN8-F, and H07RN-F, our laboratory recorded the comparative mechanical, thermal, and 180-day 5 bar (50 m) water-immersion metrics shown below.

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Measured Test Parameter (4G25 mm2 Sample).

Nominal Outer Diameter (mm).

• NSSHÖU (0.6/1 kV).: 29.4 mm (Double sheath)
• S1BC4N8-F (0.6/1 kV AD8).: 30.8 mm (Screened double)
• H07RN8-F (450/750V AD8).: 27.2 mm (Heavy single)
• H07RN-F (450/750V AD7).: 26.5 mm (Standard single)

45° Wedge Crush Short Load (kN).

• NSSHÖU (0.6/1 kV).: 24.6 kN
• S1BC4N8-F (0.6/1 kV AD8).: 21.0 kN
• H07RN8-F (450/750V AD8).: 15.4 kN
• H07RN-F (450/750V AD7).: 13.2 kN

DIN ISO 4649 Abrasion Loss (mm3).

• NSSHÖU (0.6/1 kV).: 92 mm3 (5GM5)
• S1BC4N8-F (0.6/1 kV AD8).: 104 mm3 (5GM5 AD8)
• H07RN8-F (450/750V AD8).: 128 mm3 (Hydrophobic EM2)
• H07RN-F (450/750V AD7).: 165 mm3 (Standard EM2)

Gravimetric Water Uptake (70°C x 14d).

• NSSHÖU (0.6/1 kV).: 9.8 mg/cm2
• S1BC4N8-F (0.6/1 kV AD8).: 5.2 mg/cm2
• H07RN8-F (450/750V AD8).: 6.4 mg/cm2
• H07RN-F (450/750V AD7).: 21.5 mg/cm2 (High uptake)

Insulation Resistance at Day 180 (5 Bar).

• NSSHÖU (0.6/1 kV).: 415 MOhm.km
• S1BC4N8-F (0.6/1 kV AD8).: 790 MOhm.km
• H07RN8-F (450/750V AD8).: 730 MOhm.km
• H07RN-F (450/750V AD7).: 1.2 MOhm.km (RCD Trip)

50°C Ambient Ampacity (DIN VDE 0298-4).

• NSSHÖU (0.6/1 kV).: 114.8 A (90 °C)
• S1BC4N8-F (0.6/1 kV AD8).: 114.8 A (90 °C)
• H07RN8-F (450/750V AD8).: 70.2 A (60 °C / 102 A at 85 °C)
• H07RN-F (450/750V AD7).: 70.2 A (60 °C)

Mean Service Life in Quarry Slurry.

• NSSHÖU (0.6/1 kV).: 42 Months
• S1BC4N8-F (0.6/1 kV AD8).: 38 Months
• H07RN8-F (450/750V AD8).: 32 Months (Submerged)
• H07RN-F (450/750V AD7).: 11 Months (Premature failure)

To inspect the full DIN VDE 0250-812 mining family, read our NSSHÖU, NSSHKCGEÖU & NSHXÖU Heavy-Duty Rubber Cable Guide. For chemical degradation diagnostics and factory test checklists, see our Rubber Cable Oil Swell & Ozone Cracking Guide and NSSHÖU & H07RN8-F FAT PO Checklist.

All lab tests follow IEC, DIN VDE, and ISO 9001 quality rules.

Key Takeaways & Frequently Asked Questions (FAQ)

Key Engineering Takeaways for Specifying Industrial Rubber Cables

1. Match the Cable to the Dominant Hazard (Rock Crush vs. Hydrostatic Head). Specify NSSHÖU (5GM5 double sheath) when cables drag across rock and oil; specify H07RN8-F or S1BC4N8-F when cables sit permanently underwater (AD8).
2. Never Submerge Standard H07RN-F Below 1 Meter (AD7 Limit). Osmotic moisture permeation through standard EM2 jackets drops insulation resistance below 2 MOhm.km within months.
3. Specify Screened 0.6/1 kV S1BC4N8-F for Inverter-Driven Dewatering Pumps. It combines AD8 10 bar water resistance with an 85% tinned copper braid screen for VFD EMC compliance.

Frequently Asked Questions (FAQ)

Below are direct engineering answers grounded in DIN VDE and IEC test standards (2026).

Can standard H07RN-F cable be used for permanent underwater submersible pumps?

No. Under EN 50525-2-21 and HD 516, standard H07RN-F is rated only for AD7 intermittent shallow water splashes. Continuous hydrostatic immersion (AD8) drives water vapor through the standard EM2 jacket (>21 mg/cm2 absorption), causing earth-leakage RCD trips within weeks. Always specify H07RN8-F or 0.6/1 kV S1BC4N8-F for permanent submersible pumps.

When should I upgrade from H07RN-F to NSSHÖU on construction and mining sites?

Upgrade from H07RN-F to NSSHÖU whenever the system voltage is 690 V or 1,000 V AC, when ambient temperatures exceed 40 C, or when cables are dragged over blasted rock and quarry haul roads. NSSHÖU provides a 0.6/1 kV rating, 90 C 3GI3 insulation, and a dual-extruded GM1b + 5GM5 sheath with 24.6 kN crush resistance.

What is the difference between H07RN8-F and S1BC4N8-F submersible rubber cables?

H07RN8-F is an unscreened 450/750 V AD8 submersible pump cable qualified per EN 50525-2-21 for shallow-to-medium submersion (10 m standard, up to 100 m TEBAOFLEX factory grade). S1BC4N8-F upgrades the voltage rating to 0.6/1 kV (90 C EPR) and adds a tinned copper braid screen for VFD-driven deep mine dewatering and municipal sewage pumps.

Why does NSSHÖU last nearly four times longer than H07RN-F in quarry slurry duty?

NSSHÖU uses a two-layer jacket (GM1b inner bedding plus 5GM5 polychloroprene outer sheath) with >=15 N/mm tear resistance and 92 mm3 DIN abrasion loss, whereas H07RN-F uses a single EM2 jacket (>=7.5 N/mm tear, 165 mm3 abrasion loss). In quarry field tracking, NSSHÖU averages 42 months between replacements versus 11 months for H07RN-F.

Request a Quote for NSSHÖU, H07RN-F, H07RN8-F, or S1BC4N8-F Cables

Need help selecting the right heavy-duty or submersible rubber cable for your site? Contact the TEBAOFLEX Engineering Team or message us on WhatsApp +86 185 9591 3361. We manufacture NSSHÖU Heavy-Duty Rubber Cable, H07RN-F Heavy-Duty Rubber Cable, H07RN8-F Submersible Rubber Cable, and S1BC4N8-F 0.6/1 kV Screened Submersible Cable with full autoclave and mechanical FAT certification.