What is ZR-BVR/NH-BVR Soft Copper Flexible Building Wire?
BVR cable, also known as flexible wiring or secondary wire, is a PVC-insulated copper-core cable designed specifically for fixed wiring applications in power distribution cabinets. Widely preferred by electricians and architectural professionals for its high flexibility, durability, and ease of installation, BVR cable is a standard choice for electrical distribution systems requiring reliable secondary wiring.
Model Code Breakdown
The BVR cable designation follows a standardized coding system:
- B: Fixed installation
- V: Polyvinyl chloride (PVC) insulation
- V: Polyvinyl chloride (PVC) sheath
- B: Parallel (round type not indicated)
- R: Flexible wire
Note: Copper core is indicated by omission of “L” (aluminum core).
Key Technical Specifications
| Parameter | Details |
|---|---|
| Conductor | Oxygen-free copper, multi-strand (flexible) |
| Insulation | Flame-retardant PVC |
| Rated Voltage | • 450/750V for 1.5mm² and above • 300/500V for 0.5–1.0mm² |
| Operating Temperature | • Standard: ≤70°C • BVR-105: ≤105°C |
| Installation Temperature | ≥0°C (minimum) |
| Voltage Test | Immersed in water for 1 hour, withstands 5 minutes AC 50Hz at: • 2500V (450/750V) • 2000V (300/500V) without fault |
Electrical Performance
- Rated Voltage: AC 300/500V (0.5–1.0mm²), AC 450/750V (≥1.5mm²)
- Operating Temperature: 70°C (standard), 105°C (BVR-105 variant)
- Flame Retardancy: Complies with IEC 60332-1-2 standard
Construction Details
- Conductor Material: Bare copper or tinned copper
- Insulation Material: Flame-retardant PVC
- Structure: Conductor + insulation (no outer sheath)
Color Options
Available standard colors: Red, Yellow, Blue, Green, Black, Brown, Yellow-Green, White.
Custom colors available upon request for bulk orders.
Applications
BVR cable is ideal for:
- Power distribution cabinets (primary application)
- Household appliances and electrical equipment
- Instrumentation and telecommunication systems
- Mechanical equipment requiring high flexibility and strong bending force
- AC rated voltage ≤450/750V environments
