Factory-Direct Supply of Certified Wires and Conductors for Diverse Industrial Applications
Flat Twin PVC Sheathed Cable-BVVB
Rated Voltage: 300/500V for BVVB Flat Twin PVC Sheathed Cable; 450/750V version available only according to the ordered standard and construction
Standard: GB/T 5023.4 / IEC 60227-4; JB/T 8734.2 for applicable fixed-wiring versions
Cable Profile: Flat twin, two parallel copper cores inside an integral PVC sheath and connecting web
Conductor: Solid copper for smaller sizes; stranded copper options for larger sizes, according to the ordered design
Conductor Class: Class 1 solid or Class 2 stranded per IEC 60228 / GB/T 3956
Insulation: PVC, 70°C maximum conductor operating temperature
Outer Sheath: PVC, white, black, or customized color; flat parallel profile
Construction: Cu/PVC/PVC; no external binding tape and no separate round outer jacket
Flat Twin PVC Sheathed Cable (BVVB)
Flat Twin PVC Sheathed Cable (BVVB) is a copper-conductor flat cable for fixed wiring, lighting circuits, residential distribution, and indoor electrical equipment. It consists of two parallel copper cores, each individually insulated with PVC and enclosed by a continuous flat PVC sheath.
Unlike RVVB, which uses flexible stranded conductors, BVVB is normally manufactured with a solid copper conductor for smaller fixed-wiring sizes. Stranded conductor options can be supplied for selected larger sizes or special production requirements. The flat arrangement saves installation space and keeps the two cores together along the cable route.
The two insulated cores are joined by an integral PVC connecting web formed as part of the flat sheath extrusion. The web is not an external binding tape, braid, loose filler, or separate round outer jacket. The product is intended primarily for fixed installation and should not be specified as a continuously flexing cable.
Copper Conductors — Solid copper for common fixed-wiring sizes; stranded options available by specification
PVC Insulation — Individual insulation around each conductor
Integral PVC Web — Continuous connection between the two parallel cores
Flat PVC Sheath — White, black, or customized outer sheath forming the flat twin profile
Technical Specifications
Basic Parameters
| Product Name | Flat Twin PVC Sheathed Cable / BVVB |
|---|---|
| Professional English Name | Flat Twin PVC Insulated PVC Sheathed Copper Cable |
| Construction | Cu/PVC/PVC; two parallel cores joined by an integral flat PVC sheath and connecting web |
| Conductor | Solid copper for common sizes; stranded copper available for selected sizes and production designs |
| Conductor Class | Class 1 solid or Class 2 stranded per IEC 60228 / GB/T 3956 |
| Insulation | PVC insulation, 70°C maximum conductor operating temperature |
| Outer Sheath | PVC, flat parallel profile; white, black, or customized color |
| Rated Voltage | 300/500 V for the BVVB flat twin construction; 450/750 V versions require confirmation against the ordered standard and production design |
| AC Test Voltage | Typically 2 kV, according to the applicable standard and ordered voltage grade |
| Flame Test | IEC/EN 60332-1-2 for the applicable construction |
| Maximum Conductor Temperature | +70°C continuous |
| Installation | Fixed wiring; surface wiring; indoor power and lighting circuits |
| Reference Standards | GB/T 5023.4 / IEC 60227-4; JB/T 8734.2 for applicable fixed-wiring versions |
Dimensional & Electrical Data
The following table is placed first because the conductor construction, insulation/sheath thickness, finished dimensions, and conductor resistance are the key selection parameters for BVVB.
| Size | Conductor Structure | Insulation (mm) | Sheath (mm) | Overall Dimensions W×H (mm) Lower | Overall Dimensions W×H (mm) Upper | DC Resistance at 20°C (Ω/km) | Conductor Type |
|---|---|---|---|---|---|---|---|
| 2 × 0.75 mm² | 1 / 0.97 | 0.6 | 0.9 | 3.8 × 5.8 | 4.6 × 7.0 | 24.5 | Solid copper |
| 2 × 1.0 mm² | 1 / 1.13 | 0.6 | 0.9 | 4.0 × 6.2 | 4.8 × 7.4 | 18.1 | Solid copper |
| 2 × 1.5 mm² | 1 / 1.38 | 0.7 | 0.9 | 4.4 × 8.4 | 5.4 × 8.4 | 12.1 | Solid copper |
| 2 × 2.5 mm² | 1 / 1.78 | 0.8 | 1.0 | 5.6 × 8.4 | 6.2 × 9.8 | 7.41 | Solid copper |
| 2 × 4.0 mm² | 7 / 0.85 | 0.8 | 1.0 | 5.6 × 9.6 | 7.2 × 11.5 | 4.61 | Stranded copper |
| 2 × 6.0 mm² | 7 / 1.04 | 0.8 | 1.1 | 6.4 × 10.5 | 8.0 × 13.0 | 3.08 | Stranded copper |
| 2 × 10 mm² | 7 / 1.35 | 1.0 | 1.2 | 7.8 × 13.0 | 9.6 × 16.0 | 1.83 | Stranded copper |
Key Features
Flat Fixed-Wiring Profile
The parallel flat shape saves space and supports neat surface wiring, lighting, and residential distribution layouts.
Solid Copper Conductor
Solid copper is used for common smaller fixed-wiring sizes, providing stable termination and dimensional consistency.
Integral PVC Sheath
The two cores are joined by a continuous PVC sheath and web formed during extrusion, without external binding.
Clear Dimensional Control
Finished size is specified as width × height, with insulation and sheath thickness shown separately for engineering review.
Indoor Electrical Wiring
Suitable for fixed indoor power, lighting, equipment connections, and surface wiring when correctly selected.
Color and Packing Options
Outer sheath color, core identification, marking, cut length, and packing can be arranged according to the order.
Construction Details
BVVB is a flat fixed-wiring cable built from two parallel copper conductors. Each conductor is surrounded by its own PVC insulation, and both insulated cores are enclosed and connected by a continuous flat PVC sheath. This is different from RVVB, whose conductor is normally fine-stranded and flexible for movable connections.
Rigid Copper Core
Common small and medium sizes use a solid copper conductor. Larger sizes may use a stranded copper design such as 7/0.85, 7/1.04, or 7/1.35.
Individual PVC Insulation
Each copper conductor has a separate PVC insulation layer to provide electrical separation and color identification.
Integral PVC Connecting Web
The web between the two cores is part of the continuous PVC sheath extrusion. It is not a separate tape, braid, filler, or external tie.
Limited Flexibility
BVVB is intended for fixed wiring and should not be used as a continuous-flexing substitute for RVVB or appliance flexible cords.
Certifications & Standards
Typical Applications
Residential Fixed Wiring
Flat cable routing for indoor power distribution and fixed household wiring.
Lighting Circuits
Suitable for fixed lighting circuits, switches, and indoor fixture connections within the rated voltage and installation limits.
Surface Wiring
The flat profile supports neat surface installation in suitable indoor trunking or protected routes.
Indoor Equipment Connections
Used for fixed power connections to electrical equipment and distribution assemblies.
Commercial Interior Wiring
Useful for fixed low-voltage wiring in offices, shops, workshops, and other indoor spaces.
Custom Cable Supply
Available with customized colors, markings, cut lengths, packaging, and conductor designs by order.
Request a Quote
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.