RVVB 2x2.5mm2 Flat Sheathed Wires Flexible Twin Stranded Copper Sheathed Cable
Product Summary
Product Details
Product Description
RVVB 2x2.5mm² Flat Flexible Twin Stranded Copper Sheathed Wire 300/500V Cable
Cable Designation & Meaning
|
Code |
Meaning |
|---|---|
|
R |
Flexible conductor (Class 5 fine-stranded) |
|
V |
PVC insulation |
|
V |
PVC sheath |
|
B |
Flat profile (twin parallel) |
|
2×2.5 mm² |
Two cores, each 2.5 mm² copper |
Construction: Two parallel fine-stranded flexible copper conductors, each PVC insulated, laid side-by-side and extruded with a common flat PVC outer sheath.
Applicable Standards
- GB/T 5023.5-2008 / IEC 60227-5 — Polyvinyl chloride insulated cables of rated voltages up to and including 450/750 V — Part 5: Flexible cables (cords)
- GB/T 3956 / IEC 60228 — Conductors (Class 5 flexible copper)
- GB/T 2951 / IEC 60811 — Insulating and sheathing materials — Common test methods
- GB/T 18380 / IEC 60332-1 — Flame retardant (single cable, passes)
- GB/T 5023.2-2008 / IEC 60227-2 — Test methods
RVVB-2×2.5 mm² — Flat PVC Sheathed Flexible Copper Connection Cable — Specification & Engineering Data
1. Overview & Ratings. RVVB-2×2.5 is a flat PVC sheathed flexible copper connection cable rated 300/500 V, 70 °C continuous. Built per GB/T 5023 / IEC 60227. It uses Class 5 fine-stranded copper conductors (~50×0.20 mm) for maximum flexibility — designed for appliance power leads, extension cords, and movable equipment. Finished flat dimensions ≈ 5.5×10.5 mm, ≈ 115 kg/km, 100 m coils.
2. Construction Stack (Conductor → Outer).
| Layer | Build | Wall | Dimensions |
|---|---|---|---|
| Flexible conductors (×2) | Fine-stranded annealed Cu, Class 5, 2×2.5 mm² | — | ≈ 2.0 mm each |
| PVC insulation (per core) | Polyvinyl chloride | ≈ 0.7 mm | ≈ 3.4 mm each |
| Flexible flat PVC sheath | Pliable PVC flat jacket | ≈ 1.5 mm | ≈ 5.5×10.5 mm (finished) |
3. Electrical Characteristics. DC resistance ≤ 7.41 Ω/km at 20 °C (flexible Cu 2.5 mm²); test voltage 2.0 kV AC / 5 min; insulation resistance ≥ 20 MΩ·km. Nominal ampacity ≈ 23 A (free air, 30 °C). Voltage drop ≈ 2.6 V/A·100 m.
Insulation & Sheath Data
|
Property |
Value |
|---|---|
|
Insulation material |
PVC (polyvinyl chloride), Type TI1/TI2 |
|
Outer sheath material |
PVC (polyvinyl chloride), Type TM1/TM2 |
|
Long-term service temp. |
70 °C (continuous, both insulation & sheath) |
|
Short-circuit temp. (≤5 s) |
160 °C (Cu conductor limit for PVC) |
|
Emergency overload temp. |
105 °C (short term) |
|
Test voltage AC (5 min) |
2.0 kV (routine test, 300/500 V class) |
|
Dielectric strength |
≥ 15 kV/mm (room temp.) |
|
Flex life |
≥ 20,000 bend cycles (typical, Class 5) |
Electrical Parameters
|
Parameter |
Value |
Note |
|---|---|---|
|
Rated voltage U₀/U |
300 / 500 V |
GB/T 5023.5 / IEC 60227-5 |
|
Max. system voltage |
500 V AC |
— |
|
Test voltage AC (5 min) |
2.0 kV |
Routine test |
|
DC resistance @20 °C |
≤ 7.98 Ω/km |
GB/T 3956 Class 5 Cu max, 2.5 mm² |
|
AC resistance @70 °C (est.) |
≈ 10.1 Ω/km |
per core |
|
Current rating in air (30 °C) |
20 A |
2-core flat flexible, open air |
|
Current rating clipped to wall (30 °C) |
18 A |
surface-mounted |
|
Current rating in conduit (30 °C) |
16 A |
enclosed |
|
Short-circuit current (1 s, Cu, 160 °C) |
≈ 0.28 kA (280 A) |
2.5 mm² Cu |
|
Frequency |
50/60 Hz AC |
— |
Reference values: 2×2.5 mm² at 16–18 A, single-phase 230 V → max load ≈ 3.7–4.1 kW. Voltage drop at 18 A ≈ 182 V/km per core (≈7.9% per 100 m at 230 V — limit to ≤ 40 m run without upsize).
4. Thermal & Mechanical. 70 °C continuous conductor temperature; 160 °C short-circuit (≤ 5 s); ambient range −15~+70 °C. Bend ≥ 2 × OD ≈ 20 mm — very flexible. Resists metal fatigue from repeated bending and movement.
Temperature Characteristics
|
Property |
Value |
|---|---|
|
Max. conductor operating temp. |
70 °C (continuous) |
|
Max. short-circuit temp. (≤5 s) |
160 °C (Cu conductor, PVC limit) |
|
Emergency overload temp. |
105 °C (not recommended for continuous) |
|
Min. installation ambient temp. |
0 °C (PVC); below 0 °C pre-heating required |
|
Service ambient range |
−15 °C to +70 °C (PVC insulation & sheath) |
|
Flexing temp. range |
+5 °C to +70 °C (recommended for repeated bending) |
|
Fire survival |
Standard (flame retardant single cable) |
Fire Performance (RVVB — Standard)
|
Property |
Value / Requirement |
|---|---|
|
Flame retardant |
IEC 60332-1 (single cable, passes) |
|
Halogen content |
Contains halogen (PVC insulation & sheath) |
|
Smoke density |
Standard (non-low-smoke) |
|
Corrosivity |
Corrosive (PVC) |
|
Fire survival (circuit integrity) |
Not applicable (standard version) |
5. Installation Practice & Handling. Designed for repeated bending and movement. Use ferrules at terminations to capture fine strands. At 115 kg/km, moderate weight. Indoor / appliance use only. Store dry.
Mechanical & Installation Parameters
|
Parameter |
Value |
Remarks |
|---|---|---|
|
Minimum bending radius |
≥ 6 × cable thickness → ≈ 67 mm (at 11.2 mm H) |
flexible conductor, flat profile |
|
Max. pulling tension |
200 N |
fine-stranded Cu (handle gently) |
|
Direct burial |
Not recommended (no mechanical protection; use conduit) |
— |
|
Surface mounting |
Excellent (flat profile, clips to walls; flexible for routing around corners) |
cable clips every 200–300 mm |
|
Conduit ID |
≥ 16 mm |
use oval conduit for flat profile |
|
Fixing |
cable clips, trunking, conduit |
flat shape ideal for surface wiring |
|
Impact resistance |
Low (PVC sheath only) |
protect with conduit in exposed areas |
|
Water resistance |
Moisture-resistant (PVC) |
not waterproof; indoor dry areas preferred |
|
UV resistance |
Poor (PVC degrades in sunlight) |
indoor use only |
|
Flex life |
High (Class 5 fine-stranded, designed for occasional flexing) |
— |
|
Termination note |
Strip 10–12 mm sheath + 8–10 mm insulation; use standard screw terminals; ferrules recommended for fine-stranded conductors |
prevents strand splaying |
6. Typical Service Applications. Home appliance power leads, instrument interconnection, extension cords, small motor connections, movable equipment — where flexibility and repeated flexing are required.
7. Testing & QA Regime. Routine: conductor DC resistance, 2.0 kV AC / 5 min withstand, insulation resistance, dimensional check. Type: heating test, flexibility/bending test, flame retardancy, cold bend at −10 °C.
The Wire Parameters
| RVVB-2×2.5 mm² — Flat PVC Sheathed Flexible Copper Connection Cable — Full Parameter Sheet | ||||
| Flexible connection cable · 2× fine-stranded Cu conductors / PVC insulation / flexible flat PVC sheath · 300/500 V · 70 °C · ≈ 5.5 × 10.5 mm | ||||
| Section | Parameter | Value | Unit | Remarks / Standard |
| 01 · Identification | ||||
| Cable type | RVVB — flat PVC sheathed flexible copper connection cable | — | Flexible flat lead | |
| Rated voltage (U0/U) | 300/500 | V | Appliance / equipment | |
| Number of cores | 2 × 2.5 | — | 2-core (L/N) | |
| Conductor material | Annealed copper, fine-stranded | — | Class 5 flexible | |
| Insulation material | PVC (polyvinyl chloride) | — | Per core | |
| Sheath material | PVC (flexible flat, light) | — | Outer sheath | |
| Standard | GB/T 5023 / IEC 60227 | — | Flexible cord | |
| Application | Appliance leads, instrument wiring, extension cords | — | Flexible connection | |
| Shape | Flat (flexible) | — | RVVB = flexible flat | |
| 02 · Conductor (Flexible Cu) | ||||
| Conductor type | Fine-stranded annealed copper | — | Class 5 flexible | |
| Conductor area | 2 × 2.5 | mm² | 2-core flexible | |
| Stranding construction | ≈ 50 × 0.20 mm (approx.) | — | Very flexible | |
| DC resistance @ 20 °C | ≤ 7.41 | Ω/km | Cu 2.5 mm² flexible max | |
| Conductor weight per km | ≈ 48 | kg/km | 2×2.5 flexible Cu | |
| Conductor diameter | ≈ 2.0 | mm | Flexible stranded | |
| 03 · Insulation & Sheath | ||||
| Insulation type | PVC (per core) | — | General-purpose | |
| Insulation thickness | ≈ 0.7 | mm | 300/500 V | |
| Sheath type | PVC flexible flat sheath | — | Outer, pliable | |
| Sheath thickness | ≈ 1.5 | mm | Flat flexible | |
| Finished overall dimensions | ≈ 5.5 × 10.5 | mm | Flat rectangular | |
| Sheath color | Light (customizable) | — | Flexible | |
| 04 · Electrical | ||||
| Rated voltage (U0/U) | 300/500 | V | Flexible cord | |
| Max voltage | 500 | V | Phase-to-phase | |
| DC resistance @ 20 °C | ≤ 7.41 | Ω/km | Flexible Cu 2.5 mm² | |
| Insulation resistance | ≥ 20 | MΩ·km | PVC | |
| Test voltage (AC) | 2.0 kV / 5 min | — | Routine | |
| Nominal current (ampacity) | ≈ 23 | A | Free air, 30 °C | |
| Voltage drop per 100 m | ≈ 2.6 | V/A·100m | At 7.41 Ω/km | |
| 05 · Thermal | ||||
| Max conductor temp. | 70 | °C | PVC rated | |
| Short-circuit temp. | 160 | °C | Max 5 s | |
| Ambient range | -15 ~ +70 | °C | Indoor / appliance | |
| Laying temperature | ≥ -10 | °C | Flexible | |
| 06 · Mechanical | ||||
| Min bending radius (fixed) | ≥ 2 × OD ≈ 20 | mm | Very flexible | |
| Flexibility | Excellent | — | Class 5 fine strands | |
| Crush resistance | Moderate | — | Flexible sheath | |
| 07 · Installation | ||||
| Laying methods | Appliance leads, instrument connections, extension cords, movable equipment | — | Flexible connection | |
| Connectors | Crimp lugs / plug pins / screw terminals | — | Flexible cord | |
| Special tools | Wire stripper, crimping tool | — | Basic | |
| Bend radius | ≥ 2 × OD ≈ 20 mm | — | Very flexible | |
| 08 · Packing | ||||
| Standard supply length | 100 m / coil | m | Flexible cord | |
| Reel / packing type | Coil, wrapped | — | Plastic bag | |
| Surface marking | RVVB, 2×2.5, 300/500V, GB/T 5023, metre marks | — | Continuous printing | |
| Storage conditions | Dry, indoor | — | Protect from moisture | |
| 09 · Applications | ||||
| Typical use | Home appliance power leads, instrument interconnection, extension cords, small motor connections | — | Flexible connection | |
| Max system voltage | 500 | V | 300/500 V | |
| Application level | Low voltage | — | Appliance / equipment | |
| 10 · Core Identification | ||||
| Core 1 | Red / brown | — | Phase L | |
| Core 2 | Blue / light | — | Neutral N | |
| Sheath | Light / customizable | — | Outer flexible | |
| Earth | No earth core (2-core) | — | Add earth separately if needed | |
The Wire Test Parameters
| Test Parameters — RVVB-2×2.5 mm² Flexible Flat Sheathed Cable | ||||
| No. | Test Item | Test Condition / Method | Requirement | Type |
| 1 | Conductor DC resistance | GB/T 3956, 20 °C | ≤ 7.41 Ω/km (flexible Cu 2.5 mm²) | Routine |
| 2 | Voltage test (AC) | 2.0 kV AC, 5 min | No breakdown | Routine |
| 3 | Insulation resistance | 500 V DC | ≥ 20 MΩ·km | Routine |
| 4 | Insulation thickness | Micrometer | ≥ 0.7 mm per core | Routine |
| 5 | Heating test | 70 °C conductor, 2 h | No damage | Type |
| 6 | Flexibility / bending test | 2× OD, repeated cycles | No damage | Type |
| 7 | Flame retardancy | IEC 60332-1 | Self-extinguishing | Type |
| 8 | Dimensional check | Caliper | ≈ 5.5 × 10.5 mm flat | Routine |
| 9 | Conductor continuity | Per GB/T 3956 | Both flexible cores continuous | Routine |
| 10 | Cold bend test | -10 °C, bending | No cracking | Type |
| 11 | Sheath flexibility | Bend test | Sheath remains flexible | Type |
| 12 | Printing legibility | Visual | Marking readable | Routine |
The Wire Cross Section Structure
| RVVB-2×2.5 mm² — Cross-Section Construction Diagram (Schematic) | |||||
| Flexible flat sheathed: 2×fine-stranded Cu → PVC insulation → flexible flat PVC sheath · 300/500 V · 70 °C · ≈ 5.5 × 10.5 mm | |||||
| No. | Layer | Material / Construction | Nominal Thickness (mm) | Dimensions (mm) | Function / Remarks |
| 1 | Flexible conductors (×2) | Fine-stranded annealed Cu, Class 5, 2 × 2.5 mm² | — | ≈ 2.0 each | R ≤ 7.41 Ω/km |
| 2 | PVC insulation (per core) | Polyvinyl chloride, general-purpose | ≈ 0.7 | ≈ 3.4 each | 300/500 V rated |
| 3 | Flexible flat PVC sheath | PVC, pliable flat jacket | ≈ 1.5 | ≈ 5.5 × 10.5 | Outer flexible protection |
| Key Dimensions & Properties (expanded) | |||||
| Finished flat dimensions | ≈ 5.5 × 10.5 | mm | Overall flexible flat | ||
| Approx. cable mass | ≈ 115 | kg/km | 2-core flexible flat | ||
| Nominal voltage rating | 300/500 | V | Appliance / equipment | ||
| Max conductor temp. | 70 | °C | PVC rated | ||
| Short-circuit temp. | 160 | °C | Max 5 s | ||
| Min bending radius (fixed) | ≥ 2 × OD ≈ 20 | mm | Very flexible | ||
| DC resistance @ 20 °C | ≤ 7.41 | Ω/km | Flexible Cu 2.5 mm² | ||
| Test voltage (AC) | 2.0 kV / 5 min | — | Routine | ||
| Nominal current (ampacity) | ≈ 23 | A | Free air, 30 °C | ||
| Number of cores | 2 | — | L + N | ||
| Conductor class | Class 5 (fine-stranded) | — | Flexible | ||
| Flexibility | Excellent | — | Appliance leads | ||
| Standard | GB/T 5023 / IEC 60227 | — | Flexible cord | ||
| Application | Appliance / instrument leads | — | Flexible connection | ||
| Schematic — not to exact scale. Finished flat dimensions ≈ 5.5×10.5 mm and weight ≈ 115 kg/km from cross-referenced industry samples. RVVB-2×2.5 is the flexible version of BVVB-2×2.5 — Class 5 fine-stranded copper conductors for appliance leads and movable equipment. Values marked (est.) require confirmation against the factory test certificate. | |||||
Construction Description
| Construction Description — RVVB-2×2.5 mm² flexible flat sheathed cable | |||
| Layer-by-layer flexible flat sheathed: 2×fine-stranded Cu / PVC insulation / flexible flat PVC sheath · 300/500 V · 70 °C · ≈ 5.5×10.5 mm | |||
| 1. Product Identity & Ratings | |||
| RVVB-2×2.5 is a flat PVC sheathed flexible copper connection cable rated 300/500 V, 70 °C continuous. Built per GB/T 5023 / IEC 60227. It uses Class 5 fine-stranded copper conductors for maximum flexibility — ideal for appliance power leads and movable equipment. Finished flat dimensions ≈ 5.5×10.5 mm, mass ≈ 115 kg/km, 100 m coils. | |||
| 2. Two Flexible Copper Conductors | |||
| Two 2.5 mm² fine-stranded annealed copper conductors (Class 5, ~50×0.20 mm each), laid side by side. DC resistance ≤ 7.41 Ω/km at 20 °C. The many tiny strands make the cable highly flexible and resistant to metal fatigue from repeated bending and movement. | |||
| 3. PVC Insulation & Flexible Flat Sheath | |||
| Each core has PVC insulation ≈ 0.7 mm thick. The two insulated cores are enclosed in a pliable flat PVC sheath ≈ 1.5 mm thick. The flexible sheath bends easily around corners and equipment, making RVVB suitable for moving or frequently connected devices. | |||
| 4. RVVB vs BVVB Difference | |||
| RVVB = flexible (R = soft). BVVB = rigid. RVVB uses Class 5 fine-stranded copper (~50×0.20 mm) vs BVVB's Class 2 stranded (19×0.41 mm). RVVB bends easier and resists fatigue, but has slightly higher resistance and costs more. Choose RVVB for appliance leads, extension cords, and movable equipment. | |||
| 5. Site Handling & Operational Notes | |||
| • Bend radius 2×OD (≈ 20 mm) — very flexible. • Designed for repeated bending / movement. • Use ferrules at terminations to capture fine strands. • At 115 kg/km, moderate weight. • Indoor / appliance use. • Store dry. |
8. Standards & Conformity. GB/T 5023 (PVC insulated cables); IEC 60227 (international equivalent); GB/T 3956 (Class 5 flexible conductors). Rated 300/500 V.
9. Packaging, Storage & Logistics. 100 m per coil, plastic wrapped. Continuous marking: RVVB, 2×2.5, 300/500V, GB/T 5023, metre marks. Store dry, indoor.
10. Procurement Specification. State "RVVB-2×2.5" + length. Confirm against factory test certificate.
11. Cable Industry FAQ.
- Q1: What does "RVVB" mean? R = flexible (soft); V = PVC insulation; V = PVC sheath; B = flat shape. It is a flat flexible sheathed connection cable.
- Q2: What is the difference between RVVB and BVVB? RVVB uses Class 5 fine-stranded copper (~50×0.20 mm) for maximum flexibility. BVVB uses Class 2 stranded copper (19×0.41 mm) for fixed installation. RVVB bends easier and resists fatigue, but costs more.
- Q3: When should I choose RVVB over BVVB? Choose RVVB for appliance leads, extension cords, and movable equipment that flex repeatedly. Choose BVVB for fixed wall-surface wiring that never moves.
- Q4: Why is the cable slightly larger and heavier? The fine-stranded flexible conductor has a larger effective diameter (~2.0 vs 1.78 mm) due to strand gaps, giving RVVB slightly larger flat dimensions (5.5×10.5 vs 5.0×10.0 mm) and higher weight (115 vs 105 kg/km).
- Q5: Can RVVB be surface-mounted on walls? Yes, but that is not its primary purpose. For fixed wall wiring, BVVB is more economical. RVVB is designed for flexible connection points.
- Q6: What is the ampacity? Approximately 23 A in free air at 30 °C. The flexible conductor has the same cross-section, so the ampacity matches BVVB.
- Q7: Does RVVB have an earth core? The 2-core version has only L + N. For earth, use RVVB-3×2.5 (3-core) or a separate earth wire.
- Q8: How do I terminate RVVB? Use ferrule terminals (cord-end sleeves) to fully capture the fine strands. This prevents stray strands and ensures reliable contact.
- Q9: Can RVVB be used outdoors? No — standard PVC sheath is not UV-resistant. For outdoor use, use outdoor-rated cable.
- Q10: Is RVVB fire-resistant? No — RVVB is general-purpose PVC. For fire circuits, use mineral-insulated fire cables.
- Q11: What is the bending radius? 2×OD ≈ 20 mm — very flexible. Designed for repeated flexing without conductor fatigue or breakage.
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