Twisted RVS cable, also known as 'twisted fire alarm wire' or 'twisted pair cord', is a PVC insulated stranded copper wire used primarily in fire alarm systems, public broadcasting, and household electrical connections. Its structure features two or more conductors twisted together, improving electromagnetic interference resistance and ensuring stable signal transmission.
What is RVS Cable?
RVS stands for:
R – Flexible cord (multi-stranded)
V – PVC insulation
S – Twisted pair structure
This cable is commonly called the 'flower wire' in some regions due to its twisted appearance. It is especially popular in fire protection systems and audio signal transmission.
Key Specifications
Conductor: Plain annealed copper, Class 5 flexible
Insulation: PVC (optional flame-retardant)
Sheath: PVC
Insulation Colors: Red and Black (custom colors available)
Rated Voltage: 450/750V
Test Voltage: 1000V
Operating Temperature: -20°C to +70°C
Minimum Installation Temperature: -40°C
Standard Compliance:
GB/T5023
IEC 60227
ASTM / DIN / BS (available on request)
RVS Cable Structure
Twisted copper conductors for strong signal transmission
PVC insulation and jacket to ensure flexibility and durability
Double-core or multi-core options for different application needs
Cable diameter range: 0.5 mm² to 50 mm²
Minimum bending radius: ≥10× cable outer diameter
Short-circuit temperature resistance: up to 160°C (5 seconds)
Technical Parameters (Example)
| Model | Cores × Area (mm²) | Max. Resistance at 20°C (Ω/km) | Insulation Thickness (mm) | Min. Insulation Resistance at 70°C (MΩ·km) | Outer Diameter Range (mm) |
|---|---|---|---|---|---|
| RVS 2×0.75 | 2×0.75 | 26 | 0.6 | 0.011 | 6.0–7.6 |
| RVS 2×1.0 | 2×1.0 | 19.5 | 0.6 | 0.010 | 6.4–8.0 |
| RVS 2×2.5 | 2×2.5 | 7.98 | 0.8 | 0.009 | 8.9–11.0 |
| RVS 3×1.5 | 3×1.5 | 13.3 | 0.7 | 0.010 | 8.0–9.8 |
| RVS 4×2.5 | 4×2.5 | 7.98 | 0.8 | 0.009 | 10.5–13.0 |
| More sizes available upon request... |
Applications of Twisted RVS Cable
🔥 Fire Alarm Systems – primary use in detectors, alarms, and emergency control circuits
🔊 Audio and Public Broadcasting – connects amplifiers and speakers, transmits audio signals
🏠 Home Electrical Wiring – lighting circuits, switches, low-power appliances
📞 Communication Lines – intercoms, telephony, or public address systems
🎛 Instrument Connections – for small control panels and low-voltage signaling
Core colors often have specific uses:
Red/Black: fire protection and alarms
Red/White: broadcast and intercom
Double White: lamp wiring
Features & Advantages
✅ Twisted pair design reduces electromagnetic interference (EMI)
✅ Flexible copper conductors for easy installation
✅ Stable signal transmission over longer distances
✅ Color-coded cores for easy identification and wiring
✅ Available in multiple sizes and colors
✅ Supports customization for OEM/ODM projects
Why Choose TOT Wire & Cable?
✔ Strict compliance with international standards (IEC, GB/T, etc.)
✔ Durable PVC insulation and jacket materials
✔ Factory-direct pricing with fast delivery
✔ Custom labeling, printing, and packaging available
✔ Professional team with technical support
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Need twisted RVS cable for your project?
TOT Wire & Cable provides high-quality, affordable PVC twisted pair cables for fire safety, communication, and residential wiring.