H05V-U / H05V-K
Light-duty building wire, 300/500V.
H05V is the 300/500V variant of the H07V family — intended for lower voltage, light installation applications including domestic power and lighting circuits, appliance internal wiring, and low-current fixed wiring. IEC H05 class is typically specified for 0.5–1.0 mm²; larger cross-sections at 450/750V are H07V — supplied as separate export range.
Same construction. Different voltage class. Different application.
H05V and H07V use identical conductor and PVC insulation materials. The difference is the insulation wall thickness — H05V uses thinner insulation dimensioned for 300/500V rather than 450/750V. This makes H05V suitable for domestic lighting circuits, appliance leads, and low-current wiring, but it cannot be substituted for H07V in standard power installation.
| Parameter | H05V-U | H05V-K |
|---|---|---|
| Standard | IEC 60227-3 / EN 50525-2-31 | |
| Rated voltage | 300/500V (U₀/U) | |
| Conductor | Solid copper — Class 1 | Fine-stranded — Class 5 |
| Insulation | PVC Type TI1 — same compound as H07V, thinner wall | |
| Max conductor temp | 70°C continuous · 160°C short circuit | |
| Test voltage | 2.0kV AC (1 min) | |
| Typical size range (IEC H05 class) | 0.5–1.0mm² | 0.5–1.0mm² |
| Larger sizes | 1.5mm² and above at 450/750V — H07V-U / H07V-K range (see H07 export listing) | |
| Flame retardant | Yes — IEC 60332-1-2:2004 | |
Insulation thickness and conductor resistance — H05V series.
| Size (mm²) | Insulation H05V (mm) | Insulation H07V (mm) | Max R Class 1 (Ω/km) | Max R Class 5 (Ω/km) |
|---|---|---|---|---|
| 0.5 | 0.6 | — | 36.0 | 39.0 |
| 0.75 | 0.6 | — | 24.5 | 26.0 |
| 1.0 | 0.6 | — | 18.1 | 19.5 |
| Note: Sizes 1.5mm² to 10mm² are classified as H07V (450/750V) per international standard — see H07 range. | ||||
Minimum bending radius
4× cable OD for H05V-K (flexible) and 6× cable OD for H05V-U (fixed / solid) per common international installation practice. Verify against project national wiring rules.
H05V insulation thickness from IEC 60227-3. H07V column in header retained for cross-reference to larger sizes. Sources: IEC 60228:2004 (resistance); IEC 60227-3 (thickness).
H05V in-equipment rated current — 30°C ambient, 70°C conductor.
Values per VDE 0298-4 Table 10 for single-core flexible wire in equipment (single-phase, 2-conductor circuit). Ambient 30°C, conductor 70°C.
| Size (mm²) | Method A In conduit / duct |
Method B Conduit on wall |
Method C Clipped direct |
Max R Ω/km (Class 5) |
|---|---|---|---|---|
| 0.50 | 4.5 | 5.5 | 6 | 39.0 |
| 0.75 | 6 | 7.5 | 8.5 | 26.0 |
| 1.0 | 8 | 9.5 | 11 | 19.5 |
| Note: For 1.5mm² and above (H07V class), please refer to the H07 Export Range. | ||||
Where H05V is the correct specification.
| Application | Variant | Notes |
|---|---|---|
| Light fitting internal wiring | H05V-U or H05V-K | IEC H05 class 0.5–1.0mm²; Class 5 preferred for flex routing |
| Domestic lighting circuits | H05V-U | Typ. 1.0mm² Class 1 solid for short conduit drops; larger lighting feeders → H07V |
| Appliance wiring harnesses | H05V-K | Class 5 for OEM internal routing around components |
| Low-current control circuits | H05V-K | 0.5–1.0mm² typical for IEC H05 signalling and control |
| OEM component wiring | H05V-K | Internal leads in appliances, controls, and electromechanical assemblies — MTO colours and lengths |
| Luminaire internal harnesses | H05V-U or H05V-K | 0.5–1.0mm² for EN 60598-class luminaires; Class 5 where flex routing is tight |
Standard export sheath marking
Every meter is inkjet-printed for global traceability. Standard format:
Three voltage classes. IS 694:2010 has the thickest wall — even versus H07V.
| Size (mm²) | H05V insulation (300/500V) | H07V insulation (450/750V) | IS 694:2010 insulation (650/1100V) | IS vs H05V advantage |
|---|---|---|---|---|
| 0.5 | 0.6 mm | — | 0.6 mm | Same thickness — 2.2× voltage |
| 0.75 | 0.6 mm | — | 0.6 mm | Same thickness — 2.2× voltage |
| 1.0 | 0.6 mm | — | 0.6 mm | Same thickness — 2.2× voltage |
| 1.5 | 0.6 mm | 0.7 mm | 0.7 mm | +0.1mm thicker AND 2.2× voltage |
| 2.5 | 0.7 mm | 0.8 mm | 0.8 mm | +0.1mm thicker AND 2.2× voltage |
| 4.0 | 0.8 mm | 0.8 mm | 0.8 mm | Same thickness — 2.2× voltage |
IS 694:2010 insulation thicknesses match or exceed H07V for all sizes — and H07V already exceeds H05V.
Temperature correction for warm-climate installations.
Current ratings are tabulated at 30°C ambient. H05V is a 70°C conductor — apply these factors for ambient temperatures above 30°C. The same de-rating applies whether using VDE 0298-4 in-equipment values or BS 7671 Table 4D1A building-installation values.
Per BS 7671:2018+A2:2022 Table 4B1 (70°C thermoplastic PVC). Example: 1.0mm² H05V-K at 40°C ambient: 11 × 0.87 = 9.5A.
Where H05V is specified.
H05V covers light-installation, appliance, and equipment wiring. Demand comes from OEM component wiring, luminaire internal harnesses, and appliance exporters requiring compliant single-core wire for factory assembly and cords.
The IS 694:2010 product H05V orders are fulfilled from.
H05V-U / H05V-K light duty wire — technical questions answered.
Common questions from OEM procurement, electrical design engineers, and panel builders specifying IEC 60227-3 light-duty wires for European and MENA projects.
What is the difference between H05V-U and H05V-K?
H05V-U — Solid single-core wire with Class 1 conductor per IEC 60228. Used in fixed installations where bending is not required: panel internal wiring, terminal connections, control circuit leads. Smaller minimum bending radius (single bend during installation).
H05V-K — Flexible single-core wire with Class 5 fine-stranded conductor. Designed for repeated flexing, high-movement applications, and OEM machinery power leads. Meets IEC 60227-3 flexibility test requirements. Bending radius: 6× conductor diameter during installation, 4× after fixed installation.
Both are 300/500V rated and use the same PVC insulation thickness; the difference is conductor class and intended mechanical duty.
How does H05V (IEC 60227-3) differ from IS 694:2010 wire?
Voltage rating: H05V is 300/500V (U₀/U) versus IS 694:2010 at 650/1100V. This difference reflects intended use: H05V for light-duty/low-voltage OEM applications, IS 694 for building power distribution.
Insulation wall thickness: H05V uses a thinner PVC insulation layer (approximately 0.5–0.7mm for 0.5–0.75mm² conductors) versus IS 694's thicker wall for higher voltage. This makes H05V lighter and more flexible.
Size range: H05V is restricted to the H05 class: 0.5–1.0mm² conductor cross-section. IS 694 covers much larger sizes (1.5–240mm²).
Conductor: Both use IEC 60228 Class 1 (solid) or Class 5 (stranded), so the copper specification is identical.
What are typical applications for H05V-K flexible wire?
H05V-K is specified for light-duty mobile and semi-mobile applications where repeated flexing is necessary:
- OEM machinery lead-ins: Power feeds to portable hand tools, compressors, welding machines.
- Equipment interconnect: Cable harnesses between modular panels, switchboards, and machinery sub-units.
- Industrial panel wiring: Flex-rated internal wiring in cabinets requiring periodic maintenance or reconfiguration.
- Drag-chain rated applications: Where cable is routed through moving machinery (lathe carriages, transfer mechanisms).
H05V-K is NOT rated for outdoor or harsh-environment use; keep it protected from UV, oil, and mechanical abrasion.
What is the current-carrying capacity and derating for H05V wire?
Current-carrying capacity depends on conductor cross-section, ambient temperature, and installation method (free air vs. conduit).
Example ratings (free air, 30°C ambient):
- H05V 0.5mm²: approximately 6A
- H05V 0.75mm²: approximately 10A
- H05V 1.0mm²: approximately 13A
Derating: Above 30°C ambient, apply standard temperature derating factors (typically 0.82 at 40°C, 0.71 at 50°C). For bundled cables or conduit installations, grouping derating applies. Contact us for precise derating tables for your installation scenario.
Project-scale MTO enquiries
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