LiYY Cable
The LiYY Cable is a flexible, unshielded multi-core signal and control cable engineered specifically for low-voltage data transmission, computer networking, and industrial process control units. Manufactured in strict accordance with the German standard DIN VDE 0812 and flame retardancy specification IEC 60332-1, this cable features Class 5 fine-stranded bare copper conductors, high-grade Polyvinyl Chloride (PVC) insulation, and a durable grey PVC outer sheath.
What is LiYY Cable?
The LiYY cable is a low-voltage, unarmored and unscreened flexible multi-core signal and control cable featuring Class 5 fine-stranded bare copper conductors, PVC insulation, and a durable grey PVC outer sheath complying with DIN VDE 0812 and IEC 60332-1 standards. It is designed for fixed wiring and moved flexible signal transmission up to 250/250V between electronic devices, computers, and automated process control units.
Engineered for lightweight, unshielded interconnectivity in compact electronic enclosures, the cable utilizes an ultra-flexible fine-stranded copper bunching profile paired with smooth PVC extrusion. This geometry minimizes the overall cable diameter and total drag weight while providing dependable core flexibility, clean stripping, and flame-retardant safety in dry and damp industrial control environments.
LiYY Cable Construction
- Conductor: Class 5 fine-stranded bare copper conductors per IEC/EN 60228 delivering high flexibility and superior conductivity.
- Insulation: High-grade Polyvinyl Chloride (PVC) compound engineered for low-loss dielectric performance up to +80°C.
- Bedding / Inner Layer: Compact multi-core bunching assembly optimized for smooth routing and easy jacket removal.
- Screen / Armour: Unscreened / Non-armored configuration designed for minimum outer diameter and high flexibility.
- Outer Sheath: Specially formulated industrial-grade Polyvinyl Chloride (PVC) compound, flame retardant per IEC 60332-1.
- Core Identification: Color-coded cores conforming to DIN 47100 standards (Core 1: White, Core 2: Brown, Core 3: Green, Core 4: Yellow, Core 5: Grey, Core 6: Pink, Core 7: Blue, Core 8: Red, etc.).
- Sheath Colour: Grey.
Applications
LiYY cables are engineered for flexible signal transmission, data acquisition, and process control wiring across commercial electronics, automation panels, and measuring systems where unshielded, space-saving interconnects are required. Their robust PVC formulation ensures operational longevity in both static and free-moving setups without tensile stress.
Typical installation environments include:
- Process Control Units & Automation: Signal connections between Programmable Logic Controllers (PLCs), sensor networks, and relay modules.
- Computer Systems & Peripherals: Low-current data transmission, telemetry units, and office machine networking.
- Electronic Instrumentation & Measuring Devices: Interconnecting laboratory apparatus, scales, testing consoles, and diagnostic equipment.
- Control Panels & Switchgear Racks: High-density internal cabinet wiring and terminal interconnects requiring small bending radii.
Specifications & Dimensions
The LiYY cable portfolio covers multi-core configurations from 2 cores up to 24 cores, with nominal conductor cross-sectional areas spanning 0.14mm², 0.25mm², 0.34mm², 0.50mm², 0.75mm², and 1.0mm². Operating at a rated voltage of 250/250V, the cable supports fixed ambient temperatures from -30°C to +80°C and flexed installation from -5°C to +70°C, maintaining a tight minimum bending radius of 5× OD (fixed) and 7.5× OD (flexed). All conductor strand densities, overall cable diameters, and nominal weights strictly adhere to DIN VDE 0812 and European harmonized manufacturing guidelines.
| No. of Cores | Nominal Cross Sectional Area (mm2) | Nominal Overall Diameter (mm) | Nominal Weight (kg/km) |
| 2 | 0.1 | 3.2 | 12 |
| 2 | 0.3 | 3.6 | 17 |
| 2 | 0.3 | 4.2 | 19 |
| 2 | 0.5 | 5.6 | 23 |
| 2 | 0.8 | 5.9 | 48 |
| 2 | 1 | 6.0 | 61 |
| 3 | 0.1 | 3.4 | 17 |
| 3 | 0.3 | 3.8 | 21 |
| 3 | 0.3 | 4.5 | 19 |
| 3 | 0.5 | 5.9 | 31 |
| 3 | 0.8 | 6.0 | 57 |
| 4 | 0.1 | 3.7 | 19 |
| 4 | 0.3 | 4.1 | 27 |
| 4 | 0.3 | 4.9 | 32 |
| 4 | 0.5 | 6.4 | 39 |
| 4 | 0.8 | 6.5 | 69 |
| 4 | 1 | 6.5 | 85 |
| 5 | 0.1 | 4.0 | 22 |
| 5 | 0.3 | 4.5 | 32 |
| 5 | 0.3 | 5.6 | 38 |
| 5 | 0.5 | 7.0 | 47 |
| 7 | 0.1 | 4.7 | 27 |
| 7 | 0.3 | 5.4 | 42 |
| 7 | 0.3 | 6.6 | 50 |
| 7 | 0.5 | 7.6 | 65 |
| 8 | 0.1 | 5.3 | 30 |
| 8 | 0.3 | 6.1 | 51 |
| 8 | 0.3 | 7.2 | 61 |
| 8 | 0.5 | 7.9 | 75 |
| 12 | 0.1 | 5.8 | 48 |
| 12 | 0.3 | 6.6 | 71 |
| 12 | 0.3 | 7.9 | 85 |
| 12 | 0.5 | 9.7 | 121 |
| 12 | 0.8 | 10.1 | 179 |
| 14 | 0.1 | 6.1 | 54 |
| 18 | 0.1 | 6.7 | 72 |
| 21 | 0.1 | 7.5 | 77 |
| 21 | 0.5 | 12.6 | 184 |
| 24 | 0.1 | 7.8 | 94 |
| 24 | 0.5 | 13.6 | 221 |
Standards
Huadong Cable Group manufactures and factory-inspects LiYY control cables to ensure full compliance with international electrical safety and quality directives:
Design & Testing Standard: DIN VDE 0812
Flame Retardancy: IEC 60332-1 (Self-extinguishing)
Voltage Rating (Uo/U): 250/250V
Temperature Spectrum: Fixed: -30°C to +80°C; Flexed/Installation: -5°C to +70°C
Regulatory Compliance: CE Marked, European Regulation EN 50575 (CPR Compliant), Low Voltage Directive 2014/35/EU, RoHS Directive 2015/65/EU, REACH EC 1907/2006
Frequently Asked Questions
Q: What is the primary difference between LiYY and LiYCY cables?
A: LiYY is an unscreened (unshielded) flexible signal cable designed for minimal weight and compact dimensions, whereas LiYCY incorporates an overall Tinned Copper Wire Braid (TCWB) screen to prevent electromagnetic interference (EMC) in electrically noisy environments.
Q: What core color identification coding is utilized in LiYY cables?
A: LiYY cables use the DIN 47100 standard color code without green/yellow earth core (e.g., Core 1: White, Core 2: Brown, Core 3: Green, Core 4: Yellow, etc.), facilitating precise, error-free termination in multi-core electronic control systems.
Q: What are the minimum bending radius limits for LiYY cable during installation?
A: The cable requires a minimum bending radius of 5 times the overall diameter (5× OD) for fixed installations and 7.5 times the overall diameter (7.5× OD) for flexible, moved applications without tensile load.
Q: What payment terms does Huadong Cable accept for international export orders?
A: We provide standard international commercial payment terms including Telegraphic Transfer (T/T) and 100% Irrevocable Letter of Credit (L/C) at sight for engineering contractors and industrial machinery OEMs.
Why Choose Huadong Cable?
Huadong Cable Group manufactures LiYY flexible signal cables in strict compliance with DIN VDE 0812 standards, backed by certified IEC 60332-1 flame-retardant safety validations. To ensure maximum electrical conductivity, minimal voltage drop, and superior flexibility across industrial automation circuits, we utilize high-purity oxygen-free Class 5 fine-stranded bare copper conductors. When combined with premium PVC core insulation and a durable, chemical-resistant grey PVC outer compound, the cable delivers outstanding thermal stability up to +80°C, resisting mechanical friction and core fatigue across demanding indoor installations.
Backed by over 20 years of precision cable engineering expertise, Huadong Cable Group operates fully automated multi-core stranding and extrusion lines certified to ISO 9001, CE, CPR (EN 50575), RoHS, and REACH protocols. By eliminating commercial middlemen, we offer competitive direct factory pricing, 100% Mill Test Certificates (MTC) tested in accredited testing facilities, tailored continuous drum lengths on ISPM 15 export wooden reels, and seamless door-to-port logistics for EPC contractors and industrial electronics manufacturers worldwide.
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AboutHuaDong
Established in 1999, Huadong Cable Group is a national high-tech enterprise and an integrated manufacturer specializing in advanced cable R&D, production, and global trade. Deeply integrated into global infrastructure and the Belt and Road Initiative, Huadong Cable Group exports to over 130 countries and regions worldwide, including Europe, South America, North America, the Middle East, Africa, Asia, and Oceania.
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