You might be looking for AVRB cable for a new project. Maybe you are an electrical engineer. Or maybe you are a buyer for a construction company. This guide is for you. We will break down everything about this cable. We keep it simple. No hard words. Just facts.
AVRB is a type of power cable. It is very common in buildings. It is used for wiring lights, sockets, and switches. It is not for outdoor use. It is for inside walls or pipes. It is popular because it is cheap and works well. Let’s look at the details.
What is AVRB Cable?
AVRB stands for a specific type of wire. The “A” means it is a flexible cable. “V” stands for PVC insulation. “R” means it has a soft rubber or PVC sheath. “B” is for the flat shape sometimes, but usually, it means it is a fixed installation wire.
Think of it like a heavy-duty extension cord. But you do not move it around. You fix it in one place. It has a copper core. Copper is great for electricity. The outside cover is PVC. PVC is plastic. It stops electric shocks. It also stops fire.
This cable is used in conduit pipes. It is also used in cable trays. You can find it in houses, offices, and factories. It is safe. It follows international standards like IEC or BS. But always check your local rules.
The Structure of the Cable
Let’s look inside the cable. It has three main parts. Understanding this helps you buy better.
The Conductor (Core)
The inside is copper. It must be high quality. Good copper is 99.9% pure. Some cheap cables use recycled copper. They heat up fast. You want solid copper or stranded copper. Stranded means many small wires twisted together. This makes it flexible. Solid is one thick wire. It is stiff.
The Insulation
Around the copper is insulation. For AVRB, it is PVC. PVC is strong. It does not crack easily. It resists water and oil. The color tells you what it is for. Blue is usually neutral. Brown or Red is live. Green/Yellow is ground.
The Sheath (Jacket)
Some AVRB cables have an outer sheath. This is the black skin. It protects the wires inside. If you put wires in a wall, the sheath stops the concrete from damaging them. It also stops bugs from eating the plastic.
Technical Specifications You Must Know
When you buy, you see numbers. These numbers are specs. Here is a simple table. It shows common sizes.
| Conductor Size (mm²) | Number of Cores | Insulation Thickness (mm) | Outer Diameter (mm) | Max Resistance (Ω/km) |
|---|---|---|---|---|
| 1.5 | 1, 2, or 3 | 0.7 | 2.8 – 5.0 | 12.1 |
| 2.5 | 1, 2, or 3 | 0.8 | 3.1 – 5.5 | 7.41 |
| 4.0 | 1, 2, or 3 | 0.8 | 3.5 – 6.2 | 4.61 |
| 6.0 | 1, 2, or 3 | 0.8 | 4.0 – 7.0 | 3.08 |
| 10.0 | 1, 2, or 3 | 1.0 | 5.0 – 8.5 | 1.83 |
Note: “Max Resistance” means how hard it is for power to flow. Lower is better. If the number is high, the wire is bad.
Voltage Rating: Most AVRB is 300/500V. Some is 450/750V. This means it handles normal home voltage (110V or 220V) easily.
Temperature: It works from -15°C to +70°C. If it gets hotter than 70°C, the plastic melts. Do not use it in very hot places like saunas.
Where to Use AVRB Cable
You cannot use this cable everywhere. It has limits. Know the limits to stay safe.
Indoor Fixed Wiring
This is the main job. Put it inside walls. Put it under floors. Put it in ceilings. It is safe inside because it is dry.
Conduit and Trunking
Electricians love this cable for pipes. It slides in easy because the PVC is smooth. It does not get stuck. This saves time and money on labor.
Low Power Equipment
You can use it to connect small machines. Think of conveyor belts or small fans in a factory. Do not use it for heavy machines like big motors. They need stronger cables.
Where NOT to Use It
Do not bury it directly in dirt. The soil will eat the PVC after a few years. You need armored cable for that. Do not use it outside in the sun. UV rays crack the plastic.
How to Choose the Right AVRB Cable
You are a buyer. You want good quality. But you also want a good price. Here is how to check quality.
Check the Copper
Ask for a sample. Cut it open. Look at the copper inside. It should be bright. If it is dark or dull, it is low quality. Ask for the purity level. 99.99% is best.
Check the Thickness
Use a caliper. Measure the plastic cover. If the spec says 0.7mm, it must be 0.7mm. Cheap factories make the plastic thin to save money. Thin plastic breaks. It causes short circuits.
Look for Certificates
Never buy without tests. Ask for CE, IEC, or BS certificates. These papers prove the cable passed safety tests. If they cannot show you, do not buy.
Flexibility Test
Bend the cable. It should bend like a snake. It should not snap. If it cracks when you bend it, the plastic is bad.
AVRB vs. Other Cables (BVR, BVVB)
Buyers get confused. What is the difference?
AVRB vs. BVR
BVR is also a soft wire. It is very flexible. AVRB is similar. But AVRB often has a tougher sheath. BVR is usually for control panels. AVRB is for power.
AVRB vs. BVVB
BVVB is the flat white wire you see on walls in China. It is hard. AVRB is round and soft. BVVB is cheap. But AVRB is easier to pull through pipes. If you have many turns in your pipes, use AVRB.
Common Problems and Solutions
Even good cables fail. Here is why.
Overheating
If the cable gets hot, check the size. Maybe the wire is too thin for the power. A 1.5mm wire cannot run a big heater. Use a 2.5mm or 4mm wire.
Voltage Drop
If lights are dim at the end of the wire, the cable is too long. Electricity loses power over distance. Buy a thicker cable to fix this.
Color Fading
Cheap ink fades. This is annoying but not dangerous. Good brands print the color deep inside the plastic. It never fades.
Packing and Shipping Tips
You are importing. Shipping matters.
Coils vs. Drums
Small sizes (1.5mm, 2.5mm) come in coils (rolls). Big sizes (10mm, 16mm) come on wooden drums. Drums are heavy. Coils are easy to carry.
Container Load
A 20ft container holds about 3-4 tons of cable. Do not overload. Heavy drums can crush the bottom rolls. Use pallets to keep cables off the floor.
Water Damage
Cable hates water. If the container leaks, the copper turns green (oxidized). This is useless. Use a dry container. Put desiccant bags inside if you ship in wet weather.
FAQ About AVRB Cable
Is AVRB cable flame retardant?
Standard AVRB is not. It will burn. If you need fire safety, ask for “FR” or “LSZH” (Low Smoke Zero Halogen). It costs more. But it is safer for hospitals or schools.
Can I use it for 220V and 110V?
Yes. It works for both. The voltage rating is high enough for any home system.
What is the price trend?
Price depends on copper. Copper is a metal. The price changes every day on the London Metal Exchange (LME). When copper goes up, cable goes up.
How long is the warranty?
Most factories give 1 year. But good cable lasts 20 years. The warranty is for factory defects only.
Conclusion
AVRB cable is a workhorse. It is reliable. It is cheap. It is perfect for indoor wiring. You must check the copper quality. You must check the insulation thickness. Do not buy the cheapest option if it has no certificate.
As a buyer, you need a partner. You need a factory that tests every batch. We make AVRB cable that meets IEC standards. We use 99.9% copper. We check every meter before shipping. Contact us today for a quote. Let’s build safe buildings together.