Tired of cables that crack, stiffen in the cold, or get eaten by chemicals?
You know the struggle. You install a power cord in your factory or outdoor equipment. Everything works fine for a month. Then, the cold weather hits, and the jacket gets hard like a rock. Or maybe it rubs against a metal edge, and the insulation wears through. Worst of all, oil or cleaning fluids spill on it, and the rubber swells up and fails. This downtime costs you money. You don’t need just any wire. You need a cable that fights back against the harsh world it lives in.This is where the German Kroop 3-core 2.5+1X0.5 square PUR polyurethane cable comes in. It is not a standard PVC cable. It is a heavy-duty “strong wire” built for the toughest jobs. It bends without breaking. It resists oil and chemicals. It handles extreme heat and freezing cold. This is the last power cord you will need to buy for a long time.
What makes PUR Polyurethane better than standard PVC?
Let’s look at the material. PVC is cheap, but it cracks easily when it gets cold. It also burns with thick, toxic smoke. Our cable uses PUR (Polyurethane). This is a thermoplastic elastomer. That is a fancy way of saying it acts like rubber but is tougher.PUR is halogen-free. If there is a fire, it does not release toxic chlorine gas. It creates very little smoke. This keeps your workplace safe. But the real magic is in the mechanical strength.Standard cables have a tensile strength of about 10 to 25 N/mm². Our PUR cable has a tensile strength of 30 to 45 N/mm². It can stretch up to 700% before it breaks. Imagine pulling a cable until it is seven times its original length. It still won’t snap. This makes it perfect for moving parts. It resists abrasion better than almost anything else. It laughs at sharp edges.
Technical Specifications: The numbers that matter
You need to know if this cable fits your setup. Here are the hard facts. We do not hide behind marketing words.
- Conductor: 3 Cores (Power) + 1 Core (Ground/Control).
- Cross-Sectional Area: 2.5mm² for power cores + 0.5mm² for the ground core. This handles up to 12A to 20A depending on installation.
- Voltage Rating: 300V/500V or 0.6/1kV options available. Standard is 600V for flexible use.
- Jacket Material: Polyurethane (PUR), VDE Designation 11Y.
- Temperature Range: Flexible use: -40°C to +90°C. Fixed laying: -50°C to +90°C.
- Tensile Strength: 25 to 30 N/mm² (Minimum).
- Elongation at Break: 400% to 500%. It stretches a lot without damage.
- Flame Retardance: Self-extinguishing. Meets UL94 HB and VDE standards.
- Shielding: Options available for shielded (foil/braid) to stop signal interference.
- Outer Diameter: Approx 10.5mm to 12mm (varies by exact construction).
- Core Colors: Black, White, Green/Yellow (Ground). Custom colors available.
Where to use this “Strong Wire” cable?
You might ask, “Do I really need this specific cable?” If your application involves movement or harsh conditions, the answer is yes. Here are the real-world scenarios where this cable shines.
Drag Chains and Cable Carriers
If you have a CNC machine or a robotic arm, the cable moves back and forth millions of times. Standard cables get “metal fatigue” and the copper breaks inside. This PUR cable has a special “memory” quality. It returns to its original shape. It withstands high bending stress. It is the top choice for drag chain applications.
Industrial Automation and Robotics
In a factory, you have welding sparks, cutting oils, and coolants. A PVC cable will dissolve in oil. This PUR cable is chemically resistant. It fights off oils, solvents, and weak acids. It is also microbial resistant. Mold and mildew do not grow on it. This is critical for food processing plants or wet environments.
Outdoor and UV Exposure
Sunlight kills standard rubber. It makes the jacket brittle and crack. We add UV stabilizers to this PUR compound. It passes the VDE 472-805 weather test. You can bury it or hang it outside. It resists ozone and rain. It works perfectly for EV charging stations, outdoor lighting, or construction site power.
Heavy Machinery and Tools
The “2.5 square” wire size is thick. It carries real power. It is perfect for portable tools, welding leads, or heavy-duty extension cords. The “strong wire” construction means the copper strands are tightly packed and durable. It resists crushing. If a forklift drives over it (by accident), it is less likely to fail than a soft cable.
Why choose the “German Kroop” standard?
“German Kroop” implies a standard of quality. In the cable world, German engineering means precision. The copper is high-purity bare copper. It has low resistance, so it doesn’t get hot under load. The insulation thickness is exact. There are no thin spots that could short out.We focus on the “Strong Wire” concept. This means the conductor stranding is optimized for flexibility and strength. It is not just a soft noodle. It has structure. It is easy to strip and terminate. It holds its shape in connectors.Compared to TPE (Thermoplastic Elastomer), PUR has better abrasion resistance and oil resistance. Compared to Neoprene, PUR is lighter and more flexible at low temperatures. Compared to EPDM rubber (like in SOOW cords), PUR has better mechanical strength and cut-through resistance.
Safety and Compliance
Safety is not optional. This cable is Halogen-Free. In a fire, halogens turn into acid gas that destroys electronics and hurts lungs. Our PUR cable is Low Smoke Zero Halogen (LSZH) compliant. It is safe for use in subways, tunnels, ships, and hospitals.It also has excellent dielectric properties. The breakdown voltage is 20 kV/mm. The specific resistance is 10^12 Ohm x cm. This means the electricity stays inside the wire where it belongs. It prevents short circuits and shocks.
Frequently Asked Questions about this cable
Is this cable suitable for continuous flexing?Yes. It is rated for millions of bend cycles. It is the best choice for moving parts.Can I use this for underwater applications?It is water-resistant and suitable for wet chambers. For direct immersion, you need proper sealing on the ends, but the jacket material handles moisture perfectly.How does it handle cold weather?It stays flexible down to -40°C. You can use it in freezers or Arctic environments without it cracking.Is it resistant to chemicals?Yes. It resists oils, solvents, cleaning chemicals, and weak acids. It is great for chemical plants and garages.
Get the best price for your bulk order
You are a trading company or a factory owner. You need a reliable supplier. We are a factory specializing in export. We know how to pack the cables so they arrive without damage. We can customize the length, the connector type (like M12 or M8), and the printing on the jacket.Don’t buy cheap cables that fail. Invest in the German Kroop PUR cable. It costs a little more upfront, but it saves you thousands in maintenance and downtime.Ready to order?Send us your inquiry now. Tell us the length you need, the quantity, and if you need special connectors. We will send you a quote within 24 hours. Let’s build something durable together.Request a Quote Today!