Factory-Direct Supply of Certified Wires and Conductors for Diverse Industrial Applications
Halogen Free Wire H07Z1-K
Voltage: 450/750V, test 2.5kV, CPR B2ca-s1,d1,a1 Euroclass
Conductor: Class 5 flexible stranded copper, BS EN 60228
Insulation: HFFR type TI 7 thermoplastic LSOH per EN 50363-7, 70°C continuous
Bending: 5×D — 37% tighter than cross-link LSOH (8×D), thermoplastic advantage
Range: 16 sizes 1.5-240mm², with ampacity data for 3 installation methods
Short-Circuit: 160°C/5s, ambient -35°C to +35°C, min laying +5°C
Standard: BS EN 50525-3-31 (supersedes HD 22.9 S2 for thermoplastic LSOH)
Product Overview
Halogen Free Wire H07Z1-K is a single-core Class 5 flexible copper conductor LSOH building wire with HFFR (Halogen Free Flame Retardant) thermoplastic insulation manufactured to BS EN 50525-3-31 — the current-generation European harmonised standard for halogen-free flexible cables, superseding the older HD 22.9 S2 family. The "Z1" in the designation specifically identifies this as the thermoplastic LSOH variant under the EN 50525 system, as opposed to the "Z" cross-link polyolefin type under HD 22.9. HFFR insulation type TI 7 per EN 50363-7 provides the zero-halogen, low-smoke fire safety profile with a key installation advantage over cross-link LSOH: 5×D bending radius — significantly tighter than the 8×D required by H07Z-K cross-link polyolefin, making H07Z1-K more installer-friendly for conduit and trunking runs. CPR classification B2ca-s1,d1,a1 under the EU Construction Products Regulation provides a standardised, mandatory Euroclass fire rating — the first LSOH building wire in our range with an explicit CPR Declaration of Performance.
The trade-off for the improved flexibility is a 70°C maximum conductor temperature — 20°C below the 90°C cross-link LSOH wires — reflecting the inherent limitation of thermoplastic compounds which soften at elevated temperatures, versus cross-link thermoset materials which maintain mechanical integrity up to their decomposition point. The short-circuit temperature of 160°C matches PVC wire, not the 250°C of cross-link LSOH. For applications where the ambient temperature does not exceed 70°C (the vast majority of indoor building wiring in temperate climates), H07Z1-K provides equivalent LSOH fire safety with superior bending performance at a lower material cost — the economic sweet spot in the LSOH wire family. Optional enhanced jacket compounds are available for UV exposure, hydrocarbon/oil resistance, and anti-rodent/termite protection — these are specified at order stage and not part of the standard product.
Sixteen sizes from 1.5mm² to 240mm² include a unique feature among our product range: current carrying capacity data for three installation methods (thermo wall, pipe, and wall) at both 2-core and 3-core configurations — essential for European circuit design per HD 60364-5-52 where the installation method determines the derating factor. The metal weight and cable weight columns are separately reported, enabling copper content calculation for scrap value or material cost quoting. The ambient temperature range of -35°C to +35°C is appropriate for the European climate zone — narrower than the -40°C rating of cross-link LSOH but sufficient for all indoor and most outdoor European installations.
Class 5 Flexible Copper (EN 60228)
Stranded flexible copper conductor per BS EN 60228 Class 5. Fine multi-strand construction for complex routing through switchgear and control panels.
HFFR TI 7 Thermoplastic LSOH
Halogen Free Flame Retardant insulation type TI 7 per EN 50363-7. 70°C continuous, 160°C/5s short-circuit. 5×D bending — 37% tighter than cross-link LSOH.
CPR B2ca-s1,d1,a1 Euroclass
Explicit EU Construction Products Regulation fire classification. B2ca = very limited fire contribution, s1 = low smoke, d1 = no flaming droplets, a1 = low acidity.
5×D Bending (Thermoplastic Advantage)
37% tighter than cross-link LSOH (8×D). Thermoplastic HFFR is inherently more flexible than thermoset XLPE — easier conduit pulls.
16 Sizes with Ampacity Data
1.5-240mm² with current carrying capacity for 3 installation methods × 2 core counts. Essential for European circuit design per HD 60364-5-52.
EN 50525-3-31 (Current Standard)
Newer standard superseding HD 22.9 S2. The "Z1" designation identifies thermoplastic LSOH under the EN 50525 harmonised system.
Technical Characteristics
| Rated Voltage | 450/750V |
| Test Voltage | 2.5 kV |
| Max. Conductor Temperature | +70°C (continuous, thermoplastic limitation) |
| Max. Short-Circuit Temperature | +160°C (max 5 seconds) |
| Ambient Temperature | -35°C to +35°C |
| Min. Laying Temperature | ≥ +5°C |
| Bending Radius | 5 × outer diameter |
| CPR Classification | B2ca-s1,d1,a1 per EN 50575 |
Applicable Standards
| Standard | Scope |
|---|---|
| BS EN 50525-3-31 | Current-generation European standard for halogen-free thermoplastic insulated flexible cables rated 450/750V. Supersedes HD 22.9 S2 for thermoplastic LSOH variants. The "Z1" suffix identifies cables manufactured to this standard. |
| EN 50363-7 | Insulation compound specification — HFFR type TI 7 thermoplastic halogen-free flame retardant material for low voltage energy cables. |
| BS EN 60228 | Conductor standard — Class 5 flexible copper stranding per current European/IEC conductor specification. |
| CPR EN 50575 | EU Construction Products Regulation — mandatory Euroclass fire classification (B2ca-s1,d1,a1) required for all cables sold in the EU/EEA since 2017. |
LSOH Standard Evolution — HD 22.9 vs EN 50525
| Property | H07Z-K (HD 22.9 S2) | H07Z1-K (EN 50525-3-31) |
|---|---|---|
| Standard | HD 22.9 S2 | BS EN 50525-3-31 |
| Insulation Type | Cross-link polyolefin EI5 (thermosetting) | HFFR TI 7 (thermoplastic) |
| Max Conductor Temp | 90°C | 70°C |
| Short-Circuit Temp | 250°C | 160°C |
| Bending Radius | 8×D | 5×D |
| CPR Euroclass | Not standardised (optional) | B2ca-s1,d1,a1 (mandatory) |
| Flexibility | Stiffer (cross-linked) | More flexible (thermoplastic) |
Technical Specifications
Class 5 flexible stranded copper per BS EN 60228. HFFR type TI 7 thermoplastic LSOH insulation per EN 50363-7. Metal weight = conductor only. Current carrying capacity per EN 50525-3-31 for 30°C ambient at 2-core and 3-core configurations in thermo wall, pipe, and wall installation methods. All 16 sizes single core.
| Cross Section (mm²) | 20°C Res. (Ω/km) | Current Capacity — Thermo Wall 2-core / 3-core (A) | Current Capacity — Pipe 2-core / 3-core (A) | Current Capacity — Wall 2-core / 3-core (A) | Insulation (mm) | OD Lower (mm) | OD Upper (mm) |
|---|---|---|---|---|---|---|---|
| 1 × 1.5 | 13.3 | 15.5 / 13.5 | 15.5 / 13.5 | 17.5 / 15.5 | 0.7 | 2.6 | 3.4 |
| 1 × 2.5 | 7.98 | 21 / 18.5 | 21 / 18.5 | 24 / 21 | 0.8 | 3.2 | 4.1 |
| 1 × 4 | 4.95 | 28 / 25 | 28 / 25 | 32 / 28 | 0.8 | 3.6 | 4.8 |
| 1 × 6 | 3.30 | 36 / 32 | 36 / 32 | 41 / 36 | 0.8 | 4.1 | 5.3 |
| 1 × 10 | 1.91 | 50 / 43 | 50 / 43 | 57 / 49 | 1.0 | 5.3 | 6.8 |
| 1 × 16 | 1.21 | 68 / 58 | 68 / 58 | 76 / 65 | 1.0 | 6.1 | 8.1 |
| 1 × 25 | 0.78 | 91 / 79 | 91 / 79 | 101 / 87 | 1.2 | 7.7 | 10.2 |
| 1 × 35 | 0.554 | 110 / 96 | 99 / 86 | 125 / 108 | 1.2 | 9.0 | 11.7 |
| 1 × 50 | 0.386 | 138 / 119 | 131 / 114 | 153 / 131 | 1.4 | 10.7 | 13.9 |
| 1 × 70 | 0.272 | 178 / 153 | 168 / 146 | 196 / 169 | 1.4 | 12.5 | 16.0 |
| 1 × 95 | 0.206 | 218 / 188 | 207 / 180 | 238 / 205 | 1.6 | 14.5 | 18.2 |
| 1 × 120 | 0.161 | 252 / 217 | 240 / 208 | 276 / 238 | 1.6 | 16.1 | 20.2 |
| 1 × 150 | 0.129 | 288 / 250 | 277 / 239 | 318 / 274 | 1.8 | 18.0 | 22.5 |
| 1 × 185 | 0.106 | — / — | — / — | — / — | 2.0 | 20.2 | 24.9 |
| 1 × 240 | 0.0801 | — / — | — / — | — / — | 2.2 | 22.8 | 28.4 |
Packaging & Delivery
| Parameter | Standard |
|---|---|
| Package | Standard drum lengths; export wooden case & pallet |
| Roll Marking | Manufacturer, H07Z1-K, 450/750V, LSOH HFFR, CPR B2ca-s1,d1,a1, cross-section, length, weight, batch, CE/CPR marks |
| Colour Options | Standard LSOH identification colours; optional UV/hydrocarbon/oil/anti-rodent/anti-termite jacket on request |
| Outer Protection | Wooden case |
| Delivery Condition | Factory-new, tested per BS EN 50525-3-31, CPR DoP certified, CE marked, test certificate on request |
Typical Applications
H07Z1-K is the thermoplastic LSOH workhorse — specified for European buildings with high people or asset density where CPR compliance and installation flexibility matter more than extreme temperature tolerance:
CPR-Controlled Buildings
B2ca-s1,d1,a1 classification enables use in EU buildings requiring declared fire performance — mandatory for public buildings under CPR since 2017.
Hospitals & Care Facilities
Low smoke (s1) and no flaming droplets (d1) — critical for healthcare facilities where patient evacuation is prolonged and smoke inhalation is the primary risk.
High-Density Residential
Zero halogen acid gas (low acidity a1) — protects building structure and electronics in apartment blocks where PVC smoke through riser shafts would cause widespread damage.
Switchgear & Control Cabinets
5×D bending radius enables easier routing through crowded switchgear compartments than 8×D cross-link LSOH — the installation advantage of thermoplastic.
EU Public Works Tenders
CPR DoP (Declaration of Performance) is mandatory for all EU public building tenders — H07Z1-K carries the full EN 50575 CPR certification package.
Precision Circuit Design
Three-method ampacity data (thermo wall/pipe/wall, 2-3 core) enables precise circuit design per HD 60364-5-52 — no need to estimate derating factors.
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Frequently Asked Questions
As a factory, we offer flexible MOQ depending on the cable type. For standard stock items, MOQ is low; for customized specifications, please contact our sales team for a detailed quote.
Yes, Qiangli cables are manufactured in compliance with international standards such as UL, CE, TUV, and VDE. We provide full test reports and certificates upon request.
Absolutely. We have a dedicated R&D team that can customize cable structure, material, color, and printing to meet your specific project needs.
For standard products, lead time is usually 7-15 days. For large-scale project orders or customized products, it typically ranges from 20 to 30 days.
Yes, we provide free samples for most standard cables. You only need to cover the international courier costs. Contact us to arrange your sample shipment.