Tired of cables that break, crack, or ruin your signal quality?
You know the struggle. You buy a cable that looks good on paper, but when you try to pull it through a tight conduit, it gets stuck. You force it, and the insulation cracks. Or maybe it works for a week, but then moisture gets in, corrosion starts, and your control panel shows errors. In audio setups, you hear buzzing noises because the shielding is bad or the wires are too stiff to route properly.You need a wire that bends without breaking. You need a cable that fits perfectly into 9 mm cable glands without extra hassle. You need a signal cable that stays flexible in cold weather and doesn’t melt in the heat. Most “standard” cables are too thick, too stiff, or use cheap materials that fail after a year. You waste money on re-work and face angry clients because of downtime.We built this 4-core 1.25 sq mm all-plastic flexible cable to solve these headaches. It is designed specifically for signal transmission, instrumentation, and low-voltage power connections where space is tight and reliability is a must.
What makes this 4-core flexible cable special?
This is not just a piece of copper wire. It is a complete engineering solution. Let’s look at the numbers. The conductor is 1.25 square mm. This size is the “sweet spot” for signal and control. It carries enough current for small sensors and relays without being too bulky.The structure is 4 cores. We use a specific color code: Red, Black, White, and Green. Why these colors? Because in the real world, you need to identify wires fast. Red is usually live or positive. Black is negative or ground. White is often a second live or data line. Green is almost always ground or earth. Having distinct colors saves you hours of testing with a multimeter.The outer diameter is 9.05 mm. This is a precise measurement. Many suppliers sell “10 mm” cables that are actually 11 mm. Our cable is exactly 9.05 mm. This means it fits into standard 9 mm or 10 mm drag chains and cable glands perfectly. You don’t have to fight with it during installation.
Technical Specifications You Can Trust
We don’t hide behind fancy words. Here are the real specs based on international standards like IEC and BS EN.
- Conductor Material: Bare Copper (BC). We use high-purity electrolytic copper (99.9%). This means low resistance and less heat.
- Conductor Structure: Flexible Class 5 Stranding. This isn’t a solid rod. It is made of many thin wires twisted together. This is why it bends so easily.
- Number of Cores: 4 Cores.
- Nominal Cross-Sectional Area: 1.25 sq mm.
- Insulation Material: PVC (Polyvinyl Chloride). We use a special mix that stays flexible down to -20°C and handles up to 70°C or 90°C in dry conditions.
- Sheath Material: PVC. The outer jacket is all-plastic. It resists oil, acid, and moisture.
- Outer Diameter: Approx 9.05 mm (± 0.2 mm tolerance).
- Rated Voltage: 300/500 Volt. This is standard for control circuits.
- Temperature Range: Fixed installation: -40°C to +70°C. Moving installation: -5°C to +70°C.
- Bending Radius: 6x to 10x the diameter. You can bend this cable around corners without damaging the core.
- Electrical Resistance: Max 18.1 Ohm/km at 20°C. This ensures your signal goes through without losing strength over long distances.
Why “All-Plastic” PVC is the Best Choice for You
You might ask, why PVC? Why not rubber or XLPE?1. Cost-Effective: PVC gives you great performance without the high price of specialized rubbers. For a 1.25 sq mm cable, PVC is the industry standard for a reason.2. Flame Retardant: Our PVC compound is self-extinguishing. If there is a short circuit spark, the cable won’t catch fire and spread it. This is crucial for building safety.3. Water & Chemical Resistance: The “all-plastic” design means no metal armor to rust. If you use this in a wet environment, like a wastewater plant or an outdoor sensor, the water can’t corrode the copper. The PVC sheath acts as a perfect barrier.4. Easy to Terminate: You don’t need special tools. A good wire stripper and a screwdriver are enough. The insulation strips cleanly, and the ends don’t fray as much as cheaper cables.
Where should you use this 9.05 mm 4-core cable?
This cable is a workhorse. We sell it to engineers in different industries. Here is how they use it:##### Industrial Automation & Control PanelsThis is the #1 use case. Factories use thousands of meters of this cable to connect PLCs (Programmable Logic Controllers) to sensors.
- Scenario: A conveyor belt needs a start button, a stop button, and a status light. You need 3 wires. We give you 4. The 4th core is a spare or for a second signal.
- Benefit: The 9.05 mm diameter fits perfectly into machine wiring ducts. It doesn’t clutter the panel.
##### Instrumentation and Data TransmissionFor 4-20mA current loops, which are standard in process control.
- Scenario: Measuring pressure in a pipe. The sensor sends a signal to a display screen.
- Benefit: The twisted pair construction (if you twist the cores) reduces electromagnetic interference (EMI). You get accurate readings without “noise” on the line.
##### Audio and Intercom SystemsLow voltage audio and public address systems often use multi-core cables.
- Scenario: Connecting a central intercom unit to room stations. You need power (2 cores) and audio (2 cores).
- Benefit: The distinct Red/Black/White/Green colors make it easy to match terminals. The flexible jacket makes it easy to snake through walls and ceilings.
##### Automotive and Marine Applications
- Scenario: Wiring a boat’s navigation lights or a car’s aftermarket sensors.
- Benefit: PVC resists salt water and oil. The flexibility absorbs vibrations from the engine so the wires don’t snap.
Color Code & Wiring Standards
We follow strict color coding to help you avoid mistakes. For a 4-core cable, the standard is:
- Red: Phase / Positive / Live (L)
- Black: Neutral / Negative (N)
- White: Switched Live / Data Line
- Green / Yellow: Protective Earth (PE) – Note: Sometimes Green is used for Earth, or Green/Yellow stripe. Check local regulations.
In some old UK standards, you might see Blue instead of Black for Neutral. But for export and general industrial use, Red, Black, White, Green is the most universal and easily understood set.When you cut the cable, you will see the cores are easy to identify. We print the color on the insulation, or the insulation is solid color all the way through. This prevents confusion when you strip 50 meters of wire.
Quality Control: How we ensure you get the best
We are a factory, not just a trader. We control the process from copper rod to the final drum.
- Copper Purity Check: We test every batch of copper to ensure it is 99.9% pure. No recycled scrap copper that breaks easily.
- Diameter Control: We use laser measuring tools to keep the outer diameter at 9.05 mm. If it’s too thick, it won’t fit your glands. If it’s too thin, the insulation is weak. We hit the target every time.
- Voltage Testing: We test every drum at 2000V or 3500V to ensure there are no pinholes in the insulation.
- Aging Tests: We put samples in ovens at 90°C for 7 days to simulate 10 years of use. If it cracks, we reject the batch.
Packaging and Shipping
We know logistics is a pain for importers.
- Packing: Standard export packing. Coils wrapped in clear PVC film to keep moisture out, then wrapped in hessian (jute) or woven bags.
- Drum Options: Wooden drums, plywood drums, or plastic spools.
- Lengths: Standard 100 meters or 500 meters per coil. We can do custom lengths (e.g., 250m) if you need.
- Markings: The cable is printed with our brand, spec (4×1.25mm²), voltage, and meter marks. This makes it easy for your electricians to measure on site.
Why buy this from us?
You have many choices in China. Why choose us?
- We are the Source: We are the manufacturer. You cut out the middleman. You get a better price.
- Customization: Need a different color? Need a special print on the jacket? Need a different conductor resistance? We can adjust the production line for you.
- Speed: We keep stock of 1.25 sq mm cable. For bulk orders, we produce fast.
- Certifications: We have CE, ISO, RoHS, and CCC. If you need CPR (Construction Products Regulation) or UL, we can guide you through the testing.
- Samples: We offer free samples (you pay shipping). You can test the flexibility and diameter in your own workshop before placing a big order.
Don’t risk your project with cheap, stiff cable
Imagine installing a system with a cable that fails in 6 months. The cost of sending a technician to fix it is 10 times the cost of the cable itself. Invest in quality now.Our 4-core 1.25 sq mm all-plastic flexible cable gives you the peace of mind that your installation will work for years. It is flexible enough to route easily, tough enough to handle harsh environments, and precise enough to fit your connectors.Ready to get a quote?Send us an inquiry today. Tell us the quantity you need and your port of destination. We will send you a detailed quotation within 24 hours. Ask for a free sample to test the quality yourself. Let’s build something reliable together.[GET A FREE QUOTE NOW][REQUEST A FREE SAMPLE]