Overview
| Model NO. | Twin and Earth Cable /BVV/H05VV-U | Application | Surface-Mounted、Power Distribution Units Wiring,Residential &Commercial Building |
| Voltage | low Voltage Cable | Conductor | Pure Copper |
| Insulation Material | PVC | Sheath Material | PVC |
| Material Shape | round | Diameter | 1 AWG, 2 AWG, 4 AWG, 6 AWG, 7AWG |
| Certification | ISO, CCC, CE, RoHS, VDE | Temperature | -5°C to +70°C |
| Brand | ZhongYI | Voltage Type | 300/500V |
| Company Name | ZHONGYI Cable Co., Ltd | CORE | 2,3,4,5 |
| Transport Package | Iron Wood Shaft | Specification | 1.3 mm, 1.7 mm, 2.1 mm, 2.5 mm, 1.8mm |
| Origin | HEBEI China | Conductor Type | Class 1 |
| Nominal cross-sectional area (mm²) | Common AWG | Conductor structure (No./single wire diameter mm) | Nominal sheath thickness (mm) | Average outer diameter (mm) | Max DC resistance of conductor at 20 Ω/km |
Approx.weight kg/km |
| 1 x 1.0 | 18 | 0.8 | 1.8 | 6.9 | 19.5 | 60 |
| 1 x 1.5 | 16 | 0.8 | 1.8 | 7.2 | 13.3 | 70 |
| 1 x 2.5 | 14 | 0.8 | 1.8 | 7.8 | 7.98 | 88 |
| 1 x 4.0 | 12 | 1 | 1.8 | 8.6 | 7.98 | 88 |
Features
Twin and Earth Cable T&E Cable calls PVC Insulated and PVC Sheathed Cable , is a standard building wire widely used for fixed installations. In international standards (IEC), it is categorized as 60227 IEC 10
| Cable Code / Standard | International / Western Technical Name | Conductor Type & Rigidity | Insulation / Jacket Material | Voltage Rating | Primary Target Installation | Chinese Equivalent / Status |
|---|---|---|---|---|---|---|
| BVV | PVC Insulated, PVC Sheathed Fixed Surface Cable | Rigid (Class 1 Solid / Class 2 Stranded) | PVC Insulation + PVC Outer Jacket (Double Layer) | 300/500 V | Surface mounting directly on walls or open cable trays without conduits. | Baseline Model |
| Twin & Earth (T&E) (BS 6004 / 6242Y) |
Flat PVC Sheathed Domestic Wiring Cable with Bare Earth Wire | Rigid (Solid/Stranded Cores) | PVC Insulation + Grey Flat PVC Sheath | 300/500 V | UK and Middle East domestic house lighting and socket ring mains. | BVVB (Flat) + Integrated Bare Earth Wire |
| H05VV-U / H05VV-R | Harmonized Light PVC Sheathed Circular Power Cable | Rigid (Class 1 Solid / Class 2 Stranded) | Standard PVC Insulation + Round PVC Outer Sheath | 300/500 V | European standard indoor dry/damp areas, plastered walls, and embedded tracks. | BVV (Round Structure) |
| NYM Cable (VDE 0250) |
German Standard PVC Sheathed Building Cable with Rubber Filler | Rigid (Solid or Stranded) | PVC Insulation + Rubber Compound Filling + PVC Sheath | 300/500 V | German & Eastern European brickwork, concrete embedding, and open air trays. | Heavy-Duty BVV (With Inner Filling Layer) |
| NM-B Cable (Romex / UL 719) |
Non-Metallic Sheathed Building Wire (US Standard) | Rigid (Solid/Stranded AWG Sizes) | PVC Insulation + Nylon Jacket + Wrapped Ground Wire + PVC Outer Sheath | 600 V | North American residential timber structures, wall hollows, and ceiling voids. | Flat Multi-core Nylon-jacketed BVV |
Dual-Layer Protection:Features both primary insulation and an outer protective sheath.
Solid Conductor:Typically uses Class 1 (Solid) or Class 2 (Stranded) copper
Flame Retardancy:Usually manufactured with PVC (Polyvinyl Chloride) that meets standard fire safety ratings.
Application
Surface-Mounted Wiring (Exposed):The preferred choice for wiring directly onto walls or ceilings without conduits, thanks to its heavy-duty outer sheath.
Residential &Commercial Building Wiring:Used for fixed power supply lines, socket outlets, and lighting circuits.
Moisture-Prone Environments:Suitable for damp areas like basements or utility rooms where single-insulated wires (like BV) would be insufficient.
Power Distribution Units:Ideal for internal wiring in control boxes and power panels where a rigid, protected connection is required.
Temporary Power Supply:Often used for temporary construction sites or event power due to its durability.
Certification
Factory
FAQ
1. What specific manufacturing standards does the ZHONGYI Twin and Earth cable adhere to?
Compliance & Regulatory Alignment:
Our Twin and Earth (T&E) cable is precision-engineered and fully certified to comply with the British Standard BS 6004 specification for PVC insulated, non-armoured cables. Formally designated as 6242Y, it operates at a rated voltage of 300/500V. For environments demanding enhanced fire safety, we also manufacture the 6242B variant under BS 7211, which features Low Smoke Zero Halogen (LSZH) insulation and sheathing.
2. How do the conductor class configurations change across different cross-sectional areas?
Conductor Geometries & BS EN 60228:
To optimize both electrical conductivity and mechanical flexibility during installation, the cable’s core structures are split based on cross-sectional size according to BS EN 60228 standards: 1.0mm² to 2.5mm² profiles are designed with Class 1 solid plain annealed copper conductors to maintain structural rigidity in internal wiring, while 4.0mm² to 16.0mm² profiles are engineered with Class 2 stranded plain copper conductors to allow necessary bending flexibility for high-load main rings.
3. Why is the Circuit Protective Conductor (CPC) left bare in standard T&E cables?
Grounding Layout & Installation Workflow:
The central Circuit Protective Conductor (CPC)—commonly known as the earth wire—is left uninsulated as an industry-standard layout for flat domestic cables. This design minimizes the overall flat profile of the cable, making it easier to pull through joists and tight spaces. Electricians simply slide a green/yellow protective sleeve over the bare copper core at termination points (such as junction boxes, sockets, or consumer units) to identify the grounding path safely.
4. What are the strict environmental and routing limitations for PVC Twin and Earth wiring?
Environmental Constraints & Deployment Rules:
While our premium PVC formula permits a stable operating temperature range from -5°C to +70°C, standard T&E cable is intended exclusively for fixed internal installations in dry or damp premises. It must not be deployed outdoors without continuous conduit protection, as direct exposure to UV radiation degrades the outer PVC sheath over time. Furthermore, because it lacks steel armoring, it must be routed inside conduits or trunking whenever there is a localized risk of mechanical impact or crush damage.
5. What customization options and wholesale logistical support does ZHONGYI CABLE offer?
B2B Supply Chain & Mass Customization:
As an established B2B cable manufacturer, we offer comprehensive tailoring for bulk wholesale orders. Clients can customize the outer sheath color (standard Grey or White) and specify packaging profiles, including 100-meter easy-pull shrink-wrapped coils or heavy-duty wooden drums for large-scale construction runs. Every shipment is backed by factory routine test certificates, including high-voltage spark testing and conductor resistance verification, ensuring total compliance prior to port dispatch.
Related
