When most engineers hear “H07RN-F“, they picture the multi-core (2/3/4/5-core) version — the go-to portable cord for construction sites, stage lighting, welders, and small mobile equipment across Europe and EN-standard markets. But the single-core variant is a different beast entirely: same rugged rubber DNA, stripped down to one conductor, and optimised for heavy-duty single-pole feeds, split-phase power runs, and temporary high-current distribution where a multi-core composite would be overkill or too bulky.
Rated to EN 50525-2-21, 450/750V, with EPR insulation and chloroprene (PCP) jacket, single core H07RN-F punches above its weight in ports, mines, temporary infrastructure, and industrial mobile equipment. This guide breaks down what makes it distinct, where it beats multi-core, and how to avoid the classic single-core installation traps.
Decoding “H07RN-F” (and What “Single Core” Changes)
The code follows the harmonised European convention:
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Code Segment
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Meaning
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Single Core Implication
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|---|---|---|
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H
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Harmonised (EN-standard, CE/HD 516 compliant)
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Mandatory for EU/EEA market acceptance
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07
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Rated voltage 450/750V
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Sufficient for most 230/400V European LV systems
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R
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Rubber insulation (EPR/EPDM — cross-linked, thermoset)
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90°C continuous conductor temp, 250°C short-circuit
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N
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Neoprene (chlorinated polyethylene / PCP) jacket
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Oil-resistant, UV-stable, ozone-proof, abrasion-resistant — the “N” is what makes H07RN-F stand out from cheaper rubber cords
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F
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Fine-stranded Class 5 copper conductor
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Flexible, vibration-resistant, suitable for repeated coiling/dragging
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Single Core
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No inner assembly / overall sheath (unlike 2–5 core)
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Only 3 layers: conductor → EPR insulation → PCP jacket. Smaller OD, lower cost, independent routing
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💡 Multi-core H07RN-F bundles 2–5 insulated cores + filler + overall PCP jacket. Single core skips the assembly layer entirely — which is exactly why it shines in split-phase or high-current single-pole scenarios.
Single Core vs Multi-Core H07RN-F: When to Pick Single?
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Dimension
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Single Core H07RN-F
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Multi-Core H07RN-F (2–5 core)
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|---|---|---|
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Structure
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1× insulated core + PCP jacket
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2–5× insulated cores + filler + overall PCP jacket
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Outer Diameter (same cross-section)
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~20–30% smaller
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Bulkier (assembly + overall sheath)
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Cost (per metre, same total copper)
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Lower (fewer layers)
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Higher
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Built-in earth core
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❌ (must run separate yellow/green single core)
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✅ (includes 1× yellow/green in 3/4/5 core)
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Best routing
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Split-phase (3× single cores run separately), large single-pole feeders, temporary high-current runs
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Integrated equipment (tool + earth in one pull), handheld devices, stage/event power
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Replacement
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Swap one damaged core independently
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Replace entire assembly if one core fails
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Pick single core when:
- You need 3× independent phase runs (e.g., port crane boom arms, where each phase runs through a separate flexible hose)
- You’re feeding a high-current single-pole load (temporary site transformer to distribution board, 35–240 mm²)
- You don’t need a built-in earth (or prefer a separate earth run for safety/monitoring)
- Space in hose/tray is tight and multi-core OD is prohibitive
Pick multi-core when:
- The load needs phase + earth in one pull (portable tools, small pumps, stage boxes)
- You want simpler termination and fewer loose ends on site
Key Specifications (EN 50525-2-21 Compliant)
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Parameter
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Value
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|---|---|
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Voltage rating
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450/750V (U₀/U)
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Conductor
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Class 5 fine-stranded tinned copper (default) or bare copper; 1.5–240 mm²
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Insulation
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EPR/EPDM (cross-linked rubber), 90°C continuous
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Jacket
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Chloroprene (PCP) — oil-resistant (VDMA 2432), UV-stable, ozone-proof, abrasion-resistant
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Temp range (dynamic, installed)
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–25°C to +60°C
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Temp range (static, installed)
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Up to +85°C
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Bending radius
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≥ 6× cable outer diameter (more flexible than multi-core’s ≥8×)
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Flame retardancy
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IEC 60332-1-2 (self-extinguishing)
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Oil resistance
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Mineral oil, diesel, hydraulic fluid (moderate exposure)
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Standard colours
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Black (core + jacket), yellow/green available for earth core
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Typical Applications (Single-Core Exclusive Scenarios)
Single core H07RN-F earns its keep wherever split routing or high single-pole current matters more than integrated earth:
1. Ports, Shipyards & Container Terminals
- Quayside crane boom feeds: 3× single core H07RN-F run through separate flexible booms hoses (one per phase) — lighter than a fat 3-core, easier to replace individually when a hose rubs through.
- Container terminal temporary chargers: EU-spec mobile charging points for electric RTGs/terminal tractors, single core for DC or split-phase AC feeds.
2. Mines, Tunnels & Quarries
- Underground mobile pumps / local ventilation fans: Single core dragged along tunnel walls, rubber jacket resists rock scraping and damp, no need for multi-core’s extra cores.
- Quarry face temporary feeders: From mobile transformer to crusher/screen — 95–240 mm² single core handles 200–400A temporary load.
3. Large Construction & Infrastructure Temporary Power
- Site transformer to secondary distribution board: 35–150 mm² single core runs alongside scaffold or in temporary tray — cheaper than multi-core, easier to route around obstacles.
- Festival / exhibition temporary power: EU-compliant single core for large food stalls, stage power distros, temporary EV charging — EN 50525 passes local inspection.
4. Industrial Mobile Equipment
- Steel mill slag car / rolling mill auxiliary feeds: EPR insulation withstands radiant heat (~90°C continuous), PCP resists splashed coolant/oil.
- Cement plant mobile conveyors: Single core dragged along conveyor truss, rubber resists abrasion from limestone dust.
5. Renewable & Backup Temporary Feeds
- EU residential ESS temporary expansion: Single core H07RN-F between mobile storage unit and domestic distribution board during grid outage — EN-compliant, outdoor-rated.
- Solar farm temporary O&M power: Feeds to temporary site offices / string tester during commissioning.
Critical Installation Notes (Single-Core Specific Traps)
⚠️ These are unique to single core — multi-core H07RN-F doesn’t have these issues because cores are bundled and fields partially cancel.
1. Eddy Current Risk on 3-Phase Runs
If you run 3× single core H07RN-F in parallel inside a steel hose, steel conduit, or alongside a steel beam, the alternating magnetic field induces eddy currents in the steel → local heating, efficiency loss, potential jacket damage.
- ✅ Fix: Use non-magnetic hose/conduit (nylon, PVC-coated steel, or aluminium), or arrange the 3 cores in a triangular spread rather than flat parallel when running along steel structures.
2. No Built-In Earth Core
Single core H07RN-F does not include a yellow/green earth — you must run a separate single core yellow/green H07RN-F for earthing. For permanent-ish installs, this is actually an advantage (you can upsize the earth independently); for quick temporary jobs, it’s one extra pull.
3. Not for Long-Term Direct Burial or Permanent Fixed Wiring
H07RN-F’s PCP jacket is tough, but rubber ages faster underground than XLPE-armoured cable (YJV22 / NYY). It’s designed for mobile, temporary, or semi-fixed duty (5–10 year lifecycle). For permanent buried feeders, use YJV22 or NYY instead.
4. Size Ceiling
Practical single core H07RN-F maxes out at 240 mm². Above that, the Class 5 stranding loses flexibility (hard to coil/drag), and you’re better off with a multi-core or a different cable family (e.g., DLO for oil-field, N2XSY for permanent).
FAQ
Q: Can single core H07RN-F replace a 3-core H07RN-F for a 400V 3-phase load?
A: Electrically yes — you’d pull 3× single core (phase) + 1× yellow/green single core (earth). It’s more work on site but gives you smaller OD per core and independent replacement. For small loads (≤16A), 3-core is simpler; for large feeds (>100A) or split routing, single core wins.
Q: Is single core H07RN-F suitable for DC?
A: Yes — 450/750V rating applies to DC as well (derate slightly per EN). Common in EU temporary EV chargers (mode 2/3) and mobile storage feeds.
Q: What’s the difference between H07RN-F single core and DLO single core?
A: DLO is US-market (UL1072), 2000V, CPE jacket, oil-rated for drilling rigs. H07RN-F is EN-market, 450/750V, PCP jacket, moderate oil — H07RN-F is for general European mobile/heavy-duty; DLO is for North American oil-field/mine.
Q: Can I use single core H07RN-F for PV?
A: Short-term temporary (commissioning, O&M) — yes, PCP handles UV. Long-term fixed PV strings should use PV1-F (solar-specific, 1.8kV, 25-year life) — H07RN-F’s rubber will harden after ~10 years outdoors.
Q: What certifications does JZD’s H07RN-F carry?
A: EN 50525-2-21, CE, HD 516 harmonisation — full EU market compliance. Third-party LPCB/Basec available on request.
Why Source Single Core H07RN-F from JZD Cable?
At JZD Cable, we manufacture full H07RN-F range — single core and multi-core — so you can source the whole EN-compliant rubber cable package from one partner:
- Single core H07RN-F: 1.5–240 mm², Class 5 tinned or bare copper, EPR insulation + PCP neoprene jacket
- Multi-core H07RN-F: 2/3/4/5 core, same spec, yellow/green earth included
- Compliance: EN 50525-2-21, CE, HD 516
- Custom: Cut-to-length coils (50/100/500m), custom colours, non-magnetic armour on request for eddy-sensitive runs
- Export-ready: Documentation in EN/ES/FR for EU, LATAM, SEA, ME markets
📩 Need a single core H07RN-F quote for your port, mine, or temporary power project?
Reach the JZD team at https://jzdcable.com/contact-us/ — specify cross-section, length, tinned vs bare, and whether you need matching yellow/green earth cores.
