/ 300/500V
PVC Twisted Flexible Wire
Model: RVS / Fire Alarm Wire
Twisted PVC flexible wire suitable for low-voltage electrical connections, lighting, and household appliances.
- Voltage Rating
- 300/500V
- Number of Cores
- Array
- Cross Section
- 0.5–2.5 mm²
- Conductor
- Copper
- Armoring
- Unarmored
- MOQ
- ≥ 100 m
Standards & Certifications
- GB/T
- GB/T 5023
Downloads
Specifications
Technical Specifications & Performance
Construction
- Model / Series
- RVS / Fire Alarm Wire
- Voltage Rating
- 300/500V
- Conductor Material
- Copper
- Conductor Class
- Class 5 Flexible
- Cross Section
- 0.5–2.5 mm²
- Number of Cores
- Array
- Insulation
- PVC
- Sheath
- None
- Armoring
- Unarmored
- MOQ
- ≥ 100 m
Performance
- Max. Conductor Temp.
- 70°C
- Min. Bending Radius
- 6 × Cable Outer Diameter
About This Product
RVS-Type Twisted Flexible PVC Wire for Light Connections and Alarm Circuits
PVC Twisted Flexible Wire is a two-core or multi-core flexible connection wire made from fine-stranded copper conductors with PVC insulation, twisted together without an overall sheath. In Chinese product coding it is commonly known as RVS, meaning copper-core PVC-insulated twisted flexible wire for connection. Related variants include NH-RVS fire-resistant twisted wire and RVSP shielded twisted flexible cable.
The construction is intentionally simple: each insulated flexible conductor is twisted with the other conductor to form a compact pair. The twist helps keep the two cores together, reduces loop area compared with separated single wires, and makes installation neater in low-voltage connection circuits. It is widely used for fire alarm loops, public address wiring, lighting connection leads, household appliances, small instruments, and light control circuits where a sheathed cable is not required.
RVS is not the same as RVV, which has an outer sheath, and it is not the same as RVSP, which has a screen. It is also not a controlled-impedance data cable unless specifically designed and tested for that purpose. For export orders, specify rated voltage, conductor size, number of cores, insulation colour, flame or fire-resistance requirement, packing length, and whether the project needs ordinary RVS, flame-retardant RVS, or NH-RVS fire-resistant construction.
Wire Structure
Fine Copper Strands, PVC Insulation, Twisted Pair Construction
PVC twisted flexible wire is lighter and simpler than a sheathed flexible cable. The product depends on conductor flexibility, insulation quality, twist consistency, and correct colour coding rather than armour, sheath, or screening.
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1
Conductors — Fine-Stranded Copper
Each core uses flexible stranded copper suitable for connection wiring and small appliance leads. Bare copper is standard; tinned copper can be quoted for special environments. The conductor size should be selected by circuit current, voltage drop, terminal size, and the relevant alarm or equipment standard.
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2
Insulation — PVC Compound
PVC insulation protects each conductor and provides colour identification. Common colour combinations include red/blue for alarm and control circuits, red/black for DC connection, and white/white or customer colours for lighting and appliance leads. Flame-retardant or fire-resistant versions require special compound or mica tape construction.
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3
Twisting — Pair Formation
Two insulated flexible cores are twisted together with a controlled lay length. The twist keeps the pair organised during pulling and connection. It can reduce loop pickup compared with separated single wires, but it is not a substitute for shielding or impedance-controlled data-pair design.
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4
Optional Fire-Resistant or Shielded Variants
NH-RVS adds a fire-resistant layer, commonly mica tape, for circuits that must maintain function during fire conditions according to the project requirement. RVSP adds shielding for interference-sensitive circuits. These are different products and should be ordered explicitly.
Key Features
Lightweight Twisted Wiring for Low-Voltage Connections
RVS is useful where a pair of flexible insulated conductors must stay together, but a full outer sheath is unnecessary. It is easy to strip, easy to route in panels and conduits, and economical for high-volume connection wiring.
Twisted Pair Keeps Cores Together
The twisted construction prevents the two conductors from separating during installation and helps installers identify the circuit pair. It is neater than two loose single wires and lighter than a fully sheathed cable.
Flexible for Connection Leads
Fine copper stranding makes the wire suitable for appliance leads, lighting connections, instruments, and low-current control circuits where the wire must bend during installation or maintenance.
Common Fire Alarm Wire Choice
RVS is widely used in Chinese fire alarm and public-address wiring. For circuits that require fire survival, specify NH-RVS or the project-required fire-resistant construction instead of ordinary RVS.
300/300V or Project-Specified Rating
Many RVS products are supplied as 300/300V connection wires. Some manufacturers offer 300/500V ranges under specific standards or datasheets. The order should state the required rated voltage instead of relying on the name RVS alone.
Lower Cost Than Sheathed Cable
Without an outer sheath, RVS is compact and economical. It is the right choice where the installation already provides mechanical protection, such as conduit, equipment interiors, low-voltage boxes, or protected alarm routes.
Custom Colours and Packing
Common colours include red/blue, red/black, white/white, and customer-specified combinations. Coils, reels, cartons, metre marking, and private-label packaging can be quoted for distributors and OEM buyers.
How to Choose
Six Decisions Before Ordering PVC Twisted Flexible Wire
RVS selection is simple only when the application is clear. Fire alarm circuits, appliance leads, lighting drops, and low-voltage control wiring can require different voltage ratings, colours, flame grades, and packing formats.
Confirm ordinary RVS, NH-RVS, or RVSP
Use ordinary RVS for protected low-voltage connection wiring. Use NH-RVS when the circuit requires fire-resistant performance. Use RVSP when shielding is required for interference-sensitive circuits. These products are related but not interchangeable.
State voltage rating and standard
Many RVS wires are 300/300V. Some suppliers list 300/500V constructions. For reliable quoting, state JB/T 8734.3, GB/T 5023-related requirement, or the customer specification, plus the exact rated voltage printed on the sheath or package.
Choose conductor size by circuit current
Common sizes include 0.5, 0.75, 1.0, 1.5, and 2.5 mm², but the usable range depends on the standard and supplier. Fire alarm and signalling circuits often use smaller sizes; lighting or appliance connection may need larger conductors.
Select colour pair and marking
Red/blue is common for fire alarm and control circuits, red/black for DC or polarity-sensitive circuits, and white/white for lighting leads. Confirm whether printing, metre marking, batch marking, or customer logo is required.
Check installation protection
RVS has no outer sheath. It should be installed where mechanical protection is provided by conduit, boxes, equipment housings, or protected indoor routes. For exposed runs, outdoor routes, abrasion, or moisture, choose a sheathed cable such as RVV or another suitable cable type.
Plan packing for installation teams
RVS is usually supplied in coils, reels, or cartons for fast field distribution. Specify 100 m, 200 m, 305 m, 500 m, or custom lengths, plus carton labels, coil wrapping, colour coding, and pallet packing if the order is for distribution stock.
Applications
Where RVS Twisted Flexible Wire Is Used
PVC twisted flexible wire is best for protected light-duty wiring where paired conductors make installation cleaner. It is common in China and export projects for fire alarm, public address, and low-voltage connection circuits.
Fire Alarm and Detection Circuits
Alarm loops, detectors, manual call points, and low-current fire-control connections often use red/blue RVS or NH-RVS depending on the project fire-resistance requirement.
Public Address and Speaker Lines
Protected speaker wiring and public-address circuits can use twisted flexible wire where the system design does not require shielded or impedance-controlled audio cable.
Lighting and Appliance Leads
Lamp holder leads, light-duty appliance connections, small tools, and internal equipment wiring can use RVS where the installation is protected and the current is within the selected conductor size.
Low-Voltage Control Wiring
Instruments, small control panels, terminal boxes, access-control devices, and signalling circuits can use twisted flexible wire when no overall sheath or shield is required by the circuit design.
Not appropriate for: Exposed outdoor wiring, direct burial, high-current power feeders, mechanical abrasion, continuous flexing, VFD output, controlled-impedance data links, shielded signal circuits, or fire-survival circuits unless NH-RVS or another approved fire-resistant cable is specified by the project.
Technical Data
RVS / PVC Twisted Flexible Wire Selection Reference
The values below are a specification guide. Final conductor construction, insulation thickness, resistance, OD, packing length, and fire performance must follow the requested standard and manufacturer datasheet.
| Item | Typical Specification | Engineering Note |
|---|---|---|
| Main model | RVS | Copper-core PVC insulated twisted flexible connection wire. |
| Related variants | NH-RVS, ZR-RVS, RVSP | Fire-resistant, flame-retardant, and shielded variants must be ordered explicitly. |
| Rated voltage | 300/300V common; 300/500V by specific range | Confirm from standard and datasheet before substitution. |
| Conductor | Flexible stranded copper | Bare copper standard; tinned copper available by request. |
| Core count | 2-core twisted pair is dominant | Special multi-core twisted constructions can be quoted. |
| Cross-section | 0.5 to 2.5 mm² common | Available sizes depend on standard, voltage rating, and order quantity. |
| Insulation | PVC | Specify flame-retardant or fire-resistant construction if required. |
| Outer sheath | None | For a sheathed cable, specify RVV or another suitable cable type. |
| Screen | None for RVS | For screened twisted flexible wire, specify RVSP. |
| Standard reference | JB/T 8734.3 commonly referenced for RVS | Confirm the exact edition and project requirement. |
| Packaging | 100 m / 200 m / 305 m / 500 m coils or reels | Carton labels and distributor packaging available on quotation. |
RVS is often described as copper-core PVC insulated twisted flexible wire for connection. The product is not automatically suitable for every alarm, data, or fire-survival circuit; the system specification and local code decide whether ordinary RVS, NH-RVS, RVSP, or another cable is required.
Because RVS has no outer sheath, protect it from abrasion, moisture, sunlight, crushing, and exposed outdoor conditions unless the installation method provides adequate protection.
Comparison
Choosing Between RVS, RVV, RVSP, and NH-RVS
Many failures come from ordering the correct-looking name but the wrong protection level. The table below separates the ordinary twisted wire from sheathed, shielded, and fire-resistant variants.
| Attribute | RVS | RVV | RVSP | NH-RVS |
|---|---|---|---|---|
| Construction | PVC insulated twisted flexible wire, no sheath | PVC insulated flexible cable with PVC sheath | Twisted flexible cable with screen | Fire-resistant RVS construction |
| Best use | Protected alarm, lighting, and connection wiring | Exposed flexible appliance or equipment cable | Interference-sensitive low-voltage circuits | Fire alarm circuits requiring fire resistance |
| Outer sheath | No | Yes | Usually yes | Usually no unless specified |
| Screen | No | No | Yes | No unless specified |
| Do not choose when | Mechanical exposure or shielding is required | No sheath is needed and cost must be minimal | Fire resistance is the main requirement | Ordinary low-cost wiring is sufficient |
When to choose RVS
Choose RVS for protected indoor connection circuits where paired conductors are useful and no outer sheath, shield, or fire-resistance layer is required. It is economical, flexible, and easy to install in low-current circuits.
When to choose a variant
Choose RVV for a sheathed flexible cable, RVSP for shielding, NH-RVS for fire-resistant alarm circuits, and a data cable with controlled impedance when the system requires reliable communication performance.
Frequently Asked Questions
Common Questions From Alarm Contractors and Distributors
What does RVS mean?
RVS is the common Chinese model name for copper-core PVC insulated twisted flexible wire for connection. It is usually made as a two-core twisted pair without an outer sheath. It is widely used for fire alarm, lighting, appliance, and low-voltage connection wiring.
Is RVS the same as RVV?
No. RVS is twisted flexible wire without an overall sheath. RVV is a PVC insulated flexible cable with an outer PVC sheath. If the route is exposed to abrasion, pulling, or moisture, RVV or another sheathed cable may be more appropriate than RVS.
Can RVS be used for fire alarm systems?
RVS is commonly used for fire alarm circuits in many Chinese projects, but the project specification decides whether ordinary RVS is enough. If the circuit must maintain function during fire, specify NH-RVS or the required fire-resistant cable and test standard.
Does twisting mean it can replace data cable?
No. RVS is twisted for pairing and neat installation, not necessarily for controlled impedance or high-speed data transmission. For RS-485, Ethernet, fire alarm bus, or other communication circuits, follow the equipment manufacturer’s cable requirement.
When should I choose RVSP?
Choose RVSP when the circuit needs shielding against electromagnetic interference. Ordinary RVS has no screen. The shield type, drain wire, grounding method, and sheath construction should be confirmed from the RVSP datasheet.
What information should I send for quotation?
Send model, voltage rating, conductor size, core count, insulation colour, ordinary / flame-retardant / fire-resistant requirement, packing length, total quantity, destination country, and required test report or standard. For fire alarm projects, send the project cable specification if available.
Installation & Handling Tips
Six Practices for Reliable RVS Wiring
Because RVS has no outer sheath, installation protection matters. Treat it as a protected connection wire, not as a rugged cable for exposed routes.
Install in protected routes
Use conduit, boxes, cable channels, or equipment housings where the wire may be touched, pulled, or abraded. For exposed runs, choose a sheathed cable such as RVV or another project-approved cable.
Keep twist close to terminals
Do not untwist long lengths at the terminal. Keep the pair together as far as practical, then strip only the length needed for clean termination.
Do not overload small sizes
Select conductor size from circuit current, fuse or breaker rating, voltage drop, and terminal capacity. Small RVS sizes are for signalling and light connection, not heavy power loads.
Match fire performance to the project
Ordinary RVS should not be assumed fire-resistant. For fire alarm circuits that must operate during fire, use NH-RVS or the exact cable type named in the fire-system specification.
Avoid moisture and UV exposure
Standard PVC twisted wire is mainly for indoor protected use. Outdoor sunlight, damp environments, and chemical exposure require a different sheath or installation method.
Test continuity and polarity
Before commissioning alarm, speaker, or control circuits, verify continuity, insulation resistance, polarity where relevant, and point-to-point identification against the drawings.
Safety note: RVS is a light-duty connection wire. It must be installed according to the electrical code, fire alarm specification, and equipment manual of the project. When the project requires sheath, shield, armour, fire survival, outdoor resistance, or communication performance, specify the dedicated cable rather than ordinary RVS.
Manufacturing Capability
Why Source From Jinda Cable
Behind every drum we ship sits a 38-year track record, five production bases under one MES system, and a documentation discipline that gets cables through customs without delays.
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Every cable tested twice before shipping
Since 1987, our two-stage QC has been refined to a science: routine test on the production line, then full electrical and mechanical re-test before packing. Across 50+ export markets, our return rate stays under 0.3%.
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Five production bases, 470,000 m², synced via MES
Tianjin, Liaoning, Heilongjiang, Shandong, and Xian — each base runs under one unified MES system. Same recipe, same protocols, same traceability, regardless of which plant ships your order.
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3,000+ SKUs, custom configurations welcome
Standard sizes ship from inventory. Special voltage grades, color-coding, drum lengths, or armor configurations are routine — submit your spec and our team will quote the lead time honestly.
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Trusted by EPC contractors in 50+ countries
We supply utilities, mining operators, port authorities, and large industrial OEMs across Europe, the Americas, Southeast Asia, the Middle East, and Africa.
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Full paperwork shipped with every order
Every shipment includes factory test report, certificate of origin (COO), packing list, and bill of lading (B/L). Customer-nominated witness testing can be arranged before shipment.
Our Track Record
98.7%
On-time shipment rate (last 24 months)
< 0.3%
Return rate across export markets
25 days
Typical sea freight Tianjin → Rotterdam
100%
Shipments with routine test report attached
Logistics & Delivery
Packaging, Shipping & Documentation
What we handle on our side from production floor to the port of loading. Product-specific installation guidance is supplied with the datasheet that accompanies each order.
Packaging
- Wooden or steel drums per IEC 62004
- Coil packaging available for small cross-sections
- Standard drum lengths plus custom lengths on request
- Each drum labeled with type, voltage, cross-section, length, batch
- Waterproof wrapping for export shipments
- Cable ends sealed against moisture ingress
- Private-label / OEM packaging available under NDA
Shipping
- FCL / LCL sea freight, air freight on request
- Trade terms: EXW, FOB, CFR, CIF, DDP
- Ports of loading: Tianjin / Qingdao / Shanghai
- Typical sea freight to Rotterdam: 25 days
- Lead time confirmed at order acknowledgement
- Container loading photos sent before sailing
Documentation
- Factory routine test report (per applicable standard)
- Commercial invoice and packing list
- Certificate of origin (CO) — China Council, FORM A, FORM E available
- Bill of lading (B/L) — original or telex release
- Third-party inspection by SGS / BV / TÜV on request
- Customer-nominated witness testing arranged before shipment
Get in Touch
Request a Quote for
PVC Twisted Flexible Wire
What You'll Receive
- Technical quotation with itemized FOB / CIF pricing
- Sample factory test report from a previous shipment
- Realistic lead time including raw-material procurement
- Direct contact with the assigned sales engineer
Email
info@jindacablegroup.comResponse Time
Within 1 business day
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