Are you tired of signal cables that break easily or cause interference in your factory?
You know the problem. You are running a production line. The sensors are critical. But the cables you bought last time cracked when the machine moved. Or maybe the signal got messy because of noise. Now your whole line stops. You lose money every minute. You need a cable that bends without breaking. You need a cable that keeps the signal clean. You need a cable that lasts a long time, even in tough places. This is why we made this LiYY 3-core 0.25 sq mm cable. It is built for real work. It is flexible, strong, and reliable. It connects your sensors and computers perfectly. It stops the headaches.
What exactly is this LiYY 3-Core 0.25 mm² Cable?
This cable is a standard European-style data and control cable. The name “LiYY” tells you what it is. “Li” means it is a data cable. “Y” means PVC insulation. The second “Y” means PVC sheath. So, it has two layers of PVC plastic to protect the wires inside. It has 3 cores. Each core is 0.25 square millimeters in size. This size is very popular. It is not too thick. It is not too thin. It is just right for most control signals.The conductor is bare copper. This means it is not coated with tin or silver. Copper is the best metal for carrying electricity. We use many thin wires twisted together to make one core. This is called “stranded” wire. Because it is stranded, the cable is very flexible. You can bend it around corners easily. You can move it. You can pull it into tight spaces. It will not snap. The cores have different colors. They follow the DIN 47100 standard. Usually, you will see brown, black, and blue. Or maybe brown, black, and grey/green for grounding. This helps you connect them correctly. The outer sheath is grey. The color code is usually RAL 7001 or RAL 7032. It looks professional. It hides dirt well.
Technical Specifications You Need to Know
We believe in being honest and clear. Here are the real numbers for this cable. You can compare these with any other brand.
Electrical Properties
- Rated Voltage: This cable is for low voltage. It is not for main power. The rated voltage is 250 Volt AC.
- Peak Operating Voltage: For cores up to 0.14 mm², it is 350V. For cores 0.25 mm² and bigger, it is 500V.
- Test Voltage: We test every batch. For 0.25 mm² cores, we test at 1500 Volts (1.5 kV) between cores. This ensures no weak spots.
- Conductor Resistance: The copper is high quality. The resistance is low. This means less energy loss. It follows IEC 60228 Class 5.
- Insulation Resistance: It is very high. Minimum 20 Mega-Ohms per kilometer. This keeps the signal from leaking out.
- Capacitance: Approx. 120 nanofarads per kilometer. This is standard for data cables.
Mechanical and Physical Data
- Conductor Construction: For 0.25 mm², it is usually 7 wires of 0.25 mm or similar stranded construction (Class 5 flexible).
- Outer Diameter: For a 3-core 0.25 mm² cable, the diameter is about 5.6 mm to 6.2 mm. It depends on the thickness of the PVC sheath.
- Weight: It is light. About 31 kg per kilometer for the copper and plastic. Or roughly 0.031 kg per meter.
- Bending Radius: This is very important.
- For fixed installation (stuck on a wall): 4 times the outer diameter.
- For flexible use (moving in a chain): 10 times the outer diameter.
- This means you can bend it into a circle of about 6 cm radius without damaging it.
- Temperature Range:
- Fixed installation: -40°C to +80°C. It handles cold warehouses and hot factories.
- Flexible installation: -5°C to +70°C.
- Tensile Strength: It is not for heavy pulling. The max pulling force is around 50 Newtons per square millimeter. Do not hang heavy weights on it.
Material and Standards
- Insulation Material: PVC (Polyvinyl Chloride).
- Sheath Material: PVC.
- Sheath Color: Grey (RAL 7001 or RAL 7032).
- Flame Retardancy: It is self-extinguishing. It meets IEC 60332-1-2. If it catches fire, it stops burning when the flame is removed.
- Oil Resistance: Standard PVC has “some” resistance to oil. But if your machine leaks oil constantly, you need a special PVC or PUR cable. For normal industrial oil mist, this is fine.
- Compliance: It meets the Low Voltage Directive 2014/35/EU. It is RoHS compliant. It is REACH compliant. It is VDE tested.
Where should you use this cable? (Real World Scenarios)
This cable is everywhere in industry. It is the “workhorse” of automation. Here are the top places you will see it:
1. Sensor Connection and Process Control
This is the main job. You have a temperature sensor. Or a pressure sensor. Or a proximity switch. These sensors send a small signal to the PLC (the computer brain). This cable carries that signal. The 3 cores are perfect. One for positive, one for negative, and one for the signal. Or you can use them for 24V power and ground for a 2-wire sensor. It is flexible enough to move with the machine parts.
2. Computer Systems and Office Automation
Inside control cabinets, there are many cables. This LiYY cable is used to connect the PLC to the HMI (the touch screen). It connects drives to the controller. It is great for indoor data transmission. It is not shielded, so keep it away from big power cables that cause noise. But for short distances inside a panel, it is perfect.
3. Measuring and Regulation Technology
In labs and testing equipment, you need clean signals. This cable has stable electrical properties. It does not introduce noise into the measurement. It is used in measuring chains and control loops.
4. Fixed Installation in Damp Rooms
The PVC sheath is water-resistant. You can use it in damp or humid rooms. It is not waterproof for underground burial. But for washing stations or outdoor use with UV protection (conduit), it works well.
5. Audio and Low-Current Applications
Some people use it for low-voltage lighting control or audio signals in commercial buildings. It is cheap and easy to install.
Why choose this specific LiYY cable over others?
You have many choices. You can buy generic cable. But here is why this one is better:
- Consistent Quality: We use high-purity electrolytic copper. Cheap cables use recycled copper. Recycled copper breaks easily and has high resistance. Our cable conducts better and lasts longer.
- Precise Stranding: The strands are twisted evenly. This makes the cable round and smooth. It pulls easier through pipes. Cheap cables are lumpy and get stuck.
- Strong PVC Jacket: The outer plastic is tough. It resists abrasion. If it rubs against metal, it does not wear out fast. It also resists chemicals like acids and alkalis better than cheap PE cables.
- Exact Color Coding: We follow DIN 47100 strictly. You do not get random colors. This saves your electricians time. They do not have to use a multimeter to find the right wire.
- Certifications: We have the VDE and CE marks. If you export your machines to Europe, you need certified cables. We provide the paperwork.
Frequently Asked Questions (FAQ)
Q: Is this cable shielded?A: No. This specific model (LiYY) is unscreened. If you have a lot of electric noise from motors and VFDs, you might need a shielded cable like LiYCY. But for most general sensor work, LiYY is fine and cheaper.Q: Can I use this for 110V or 230V power?A: No. Do not use this for main power. It is only for control signals and low voltage (up to 250V). For power, use a cable like H05VV-F.Q: Can I bury this cable in the ground?A: No. The PVC is not rated for direct burial. It will degrade in the soil. You need a cable with a PE (Polyethylene) sheath for that. Use this only for indoor or conduit outdoor use.Q: What is the difference between LiYY and LiYCY?A: LiYCY has a braid shield around the cores. LiYY does not. LiYCY is for high-noise areas. LiYY is for clean areas. LiYY is more flexible and cheaper.Q: How do I strip the ends?A: Use a sharp wire stripper. Be careful not to nick the copper strands. Since it is stranded, a small nick can break the wire later.Q: What is the minimum order quantity?A: It depends on the stock. For standard 0.25mm² 3-core, we usually have stock. We can ship by the meter or by the drum (100m or 500m coils).
Don’t let cable failure stop your production line again
You need a partner who understands cables. You need a cable that works the first time, every time. This LiYY 3-core 0.25 sq mm cable is the industry standard for a reason. It is reliable. It is flexible. It is affordable. We have been making these for years. We know the materials. We know the process.Whether you are building a new machine or repairing an old one, this cable will do the job. It fits your connectors. It fits your cable glands. It fits your budget.Ready to get the best price?Do not wait for your current supplier to fail you. Send us an inquiry today. Tell us the quantity you need. Tell us where you are shipping. We will give you a quote that beats the competition. We can send you a free sample if you want to test the quality yourself.Click “Send Inquiry” now. Let’s talk about your cable needs. We are ready to ship.