Flexible Stranded Copper Wire (BVR / BVVR / ZR-BVVR / NH-VVR)
Flexible Electrical Wire
Multi-strand copper wire and sheathed flexible cable for panel and equipment wiring and tight routing
Flexible electrical wire uses a stranded copper conductor with more, thinner wires than solid building wire, so it is easier to route through tight spaces and terminate. We make it as single-core BVR, as PVC sheathed BVVR in 2 to 5 cores, and in flame retardant (ZR-BVVR) and fire resistant mica-taped (NH-VVR) versions. The conductor class (IEC 60228 Class 2 or Class 5) is confirmed against the standard on your order; continuous-flex or drag-chain duty requires a separately specified cable construction.
What is Flexible Electrical Wire?
What makes a wire flexible is the conductor, not the insulation. BVR uses more, thinner copper wires than BV of the same size: on our parameter sheet 2.5 mm² BVR is 19 × 0.41 mm where BV is one 1.73 mm wire, and 10 mm² BVR is 49 × 0.50 mm where BV is 7 × 1.34 mm. That makes it easier to bend during installation and to terminate, which is why it is used for panel wiring and equipment leads.
Our standard BVR strand make-up is not an IEC 60228 Class 5 conductor. Class 5 limits the individual wire diameter (for example 0.26 mm maximum at 2.5 mm²), and our sheet uses 0.41 mm wires at that size. If your specification requires Class 5 (or H05V-K / H07V-K type conductors), state it and we confirm the strand construction before quoting. Continuous-flex or drag-chain duty requires a separately specified cable construction.
BVR at 450/750 V in 2.5–70 mm² is covered by our CCC certificate 2002010105016709. BVVR adds a PVC sheath and comes in 2 to 5 cores; ZR-BVVR uses flame retardant compound and NH-VVR adds a mica tape layer. These sheathed and fire-performance versions are not on a CCC or CB certificate we hold. Note that our separate CCC certificate for RVV flexible cord does not cover BVVR. Annealed or tinned copper can be chosen.
Pick this page when the wire needs a multi-strand conductor for routing and termination. For single-core wire that is pulled into conduit and never moved, see Building Wire. For flat sheathed cable for fixed room wiring, see Twin & Earth Cable. For the green/yellow protective conductor, see Earth / Ground Cable.
Key features
- Rated voltage 300/500 V, 450/750 V or 0.6/1 kV
- Stranded annealed or tinned copper; conductor class confirmed against your standard
- BVR on factory sheet: 0.25–240 mm²; family range for BVVR and variants 0.5–400 mm², 1–5 cores
- PVC insulation; XLPE or LSZH optional
- Sheath optional: PVC, XLPE or LSZH
- Colours: red, yellow, blue, green, black, white, yellow/green and others
- FR, FRLS, LSZH, LSOH, LSHF and anti-termite versions available
Typical applications
- Internal wiring of control panels, switchboards and distribution boards
- Connection leads to appliances, lighting fittings and small machines
- Equipment wiring subject to vibration
- Sheathed BVVR for short flexible supply runs indoors
- ZR-BVVR and NH-VVR where the building specification asks for flame retardant or fire resistant wiring
Flexible Electrical Wire Models
Source: Huanghe factory product data
Voltage for all models: 300/500 V, 450/750 V, 0.6/1 kV. Cores: single core, 2, 3, 4, 5 core. Cross-sections are the factory family range, not a list of certified or tested combinations.
Custom sizes available on request — send us your project specification.
| Model | Structure | Description | Nominal cross-section |
|---|---|---|---|
| BVR | Cu / PVC | Stranded copper conductor, PVC insulated | 0.5, 0.75, 1, 1.5, 2.5, 4, 6, 10, 16, 25, 35, 50, 70, 95, 120, 150, 185, 240, 300, 400 mm² |
| BVVR | Cu / PVC / PVC | Stranded copper conductor, PVC insulated, PVC sheathed | 0.5, 0.75, 1, 1.5, 2.5, 4, 6, 10, 16, 25, 35, 50, 70, 95, 120, 150, 185, 240, 300, 400 mm² |
| ZR-BVVR | Cu / FR compound / FR compound | Stranded copper conductor, flame retardant insulation and sheath | 0.5, 0.75, 1, 1.5, 2.5, 4, 6, 10, 16, 25, 35, 50, 70, 95, 120, 150, 185, 240, 300, 400 mm² |
| NH-VVR | Cu / mica / FR-PVC / FR-PVC | Stranded copper conductor, mica tape, fire retardant insulation and sheath | 0.5, 0.75, 1, 1.5, 2.5, 4, 6, 10, 16, 25, 35, 50, 70, 95, 120, 150, 185, 240, 300, 400 mm² |
Verified Factory Documents — Flexible Wire
Source: China Compulsory Certification (CCC) certificates issued by CQC to Henan Huanghe Wire & Cable Co., Ltd.
Only BVR at the voltage and sizes written on the certificate is covered. BVVR, ZR-BVVR and NH-VVR are not listed. Our RVV certificate (2015010105767375) covers RVV only and is not applied to BVVR.
| Document | Validity | Standard on the certificate | Scope written on the certificate |
|---|---|---|---|
| CCC 2002010105016709 | valid 21 Apr 2023 – 20 Apr 2028 | GB/T 5023.3-2008 / IEC 60227-3:1997; JB/T 8734.2-2016 | BVR 450/750 V 2.5–70 mm² (same certificate also lists BV, BLV and RV-90) |
BVR Single Core 450/750 V — Factory Parameter Sheet
Source: Huanghe factory parameter sheet (BVR)
Values are copied from the factory sheet. Current ratings are not shown because the sheet does not state the installation conditions. The strand diameters here are larger than the IEC 60228 Class 5 limits, so this is not a Class 5 build; a Class 5 conductor is quoted separately on request. CCC covers 2.5–70 mm² only. PVC, 70 °C.
| Size (mm²) | Wires × diameter (mm) | Insulation (mm) | OD approx. (mm) | Weight approx. (kg/km) | Max. DC resistance 20 °C (Ω/km) | AC test (kV / 5 min) |
|---|---|---|---|---|---|---|
| 0.25 | 8 × 0.20 | 0.4 | 2.0 | 10 | 80.7 | 2.5 |
| 0.5 | 7 × 0.30 | 0.6 | 2.28 | 10 | 36 | 2.5 |
| 0.75 | 7 × 0.36 | 0.6 | 2.35 | 11.3 | 24.5 | 2.5 |
| 1 | 7 × 0.42 | 0.6 | 2.46 | 14.3 | 18.1 | 2.5 |
| 1.5 | 7 × 0.51 | 0.7 | 2.95 | 21 | 12.1 | 2.5 |
| 2.5 | 19 × 0.41 | 0.8 | 3.6 | 33 | 7.41 | 2.5 |
| 4 | 19 × 0.51 | 0.8 | 4.2 | 48 | 4.61 | 2.5 |
| 6 | 19 × 0.62 | 0.8 | 4.7 | 67 | 3.08 | 2.5 |
| 10 | 49 × 0.50 | 1.0 | 6.6 | 115 | 1.83 | 2.5 |
| 16 | 49 × 0.64 | 1.0 | 7.6 | 166 | 1.15 | 2.5 |
| 25 | 98 × 0.565 | 1.2 | 9.6 | 258 | 0.727 | 2.5 |
| 35 | 24 × 7 × 0.505 | 1.2 | 9.9 | 347 | 0.524 | 2.5 |
| 50 | 15 × 10 × 0.63 | 1.4 | 12.3 | 505 | 0.387 | 2.5 |
| 70 | 15 × 14 × 0.63 | 1.4 | 14.0 | 690 | 0.268 | 2.5 |
| 240 | 15 × 48 × 0.63 | 2.2 | 24.4 | 2300 | 0.0754 | 2.5 |
Flexible Wire Material Ratings
Source: Huanghe factory product data
| Item | Value |
|---|---|
| PVC — max. service temperature | 70 °C |
| PVC — max. short-circuit temperature | 160 °C (max. 5 s) |
| XLPE — max. service temperature | 90 °C |
| XLPE — max. short-circuit temperature | 250 °C (max. 5 s) |
| Min. installation temperature | 0 °C |
| Min. service temperature | -40 °C (fixed and protected installations) |
Need strand make-up, diameters and weights?
Strand count, overall diameter and weight follow the standard named on your order. The BVR sheet above is our standard build; if you need IEC 60228 Class 5, H05V-K / H07V-K or another conductor class, send the model, cores and sizes, copper type (annealed or tinned), colours and coil length, and we return a datasheet for that build.
What to send us for a flexible wire quote
- Model: BVR, BVVR, ZR-BVVR or NH-VVR
- Cores and cross-section per line item
- Copper: annealed or tinned; the conductor class your standard requires (e.g. Class 2 or Class 5)
- Insulation and sheath: PVC, XLPE or LSZH
- Colours and quantity per colour
- The standard named in your specification
- Coil or drum length, quantity and destination port
Flexible Electrical Wire gallery
Factory & delivery capability
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Frequently asked questions about Flexible Electrical Wire
Q.Is BVR a Class 5 conductor?
Not in our standard build. Our BVR sheet uses 19 × 0.41 mm at 2.5 mm² and 49 × 0.50 mm at 10 mm², which are thicker wires than IEC 60228 Class 5 allows. If your specification requires Class 5, say so and we confirm a separate strand construction before quoting. Continuous-flex or drag-chain duty requires a separately specified cable construction.
Q.What is the difference between BV and BVR?
Both are single-core copper wire with PVC insulation. BV is one solid wire up to 6 mm² and 7 to 61 thick wires above that; BVR uses more, thinner wires (for example 19 × 0.41 mm at 2.5 mm²), so it bends and terminates more easily in panels and equipment.
Q.Is your flexible wire CCC certified?
BVR at 450/750 V in 2.5–70 mm² is on CCC certificate 2002010105016709 (valid to 20 Apr 2028). BVVR, ZR-BVVR and NH-VVR are not on a CCC or CB certificate we hold, and our RVV certificate does not cover BVVR.
Q.What is BVVR?
BVVR is flexible copper wire with PVC insulation and a PVC outer sheath, available in 2 to 5 cores.
Q.Do you make fire resistant flexible wire?
Yes. NH-VVR has a mica tape layer over the flexible copper conductor for fire resistance. ZR-BVVR is the flame retardant version.
Q.Can I get tinned copper flexible wire?
Yes. The stranded conductor can be annealed plain copper or tinned copper.
Q.What colours are available?
Red, yellow, blue, green, black, white and yellow/green are standard, and other colours can be made to order.
Related products and how they differ
Building Wire (BV / BYJ)
Single-core wire for fixed runs in conduit: solid up to 6 mm², fewer and thicker strands above. Cheaper and stiffer than BVR.
View specifications →Twin & Earth Cable (BVVB / RVVB)
Flat sheathed 2+1 core cable for fixed room wiring, not for equipment leads.
View specifications →Flexible Control Cable (KVVR)
Multi-core flexible cable for control and signal circuits rather than power wiring.
View specifications →Related Technical Guides
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Read guide →Ready to source Flexible Electrical Wire from the factory?
Send your specs — model / size / conductor class / insulation / colours / coil length / destination port. Quote within 24 hours.
Checking compliance before you enquire? Factory ISO 9001 and CCC certificates and test reports. Product standards and certificates are confirmed per model, market and order.