Overview
A 4 mm wire price depends on a larger copper conductor, the insulation and the coil length, not the size alone. A 4 mm wire feeds geysers and heavier appliance points. The fair way to judge the price is to match the metal, the build and the grade before you compare two options.
The 4 mm wire is where a home circuit starts to carry serious load. It feeds geysers, heavier appliance points and dedicated circuits that a socket wire would struggle with. That jump in duty comes from more copper in every metre, which is why a 4 mm wire costs more than the sizes below it.
Read as a specification, the price is easy to follow. A 4 mm wire is a set conductor for a heavier load. For the bigger picture across every size, see what really sets a wire price.
What the 4 mm Size Carries
The 4 mm is the copper area inside, four square millimetres. That area carries around twenty six amperes, which suits geysers, larger appliance points and dedicated circuits. It is the size chosen when a 2.5 mm wire would be running too close to its limit.
What Moves the 4 mm Copper Wire Price
A few clear things set the 4 mm copper wire price. Reading them off the reel tells you why two that look the same can cost differently.
- Copper quality: The purity and amount of the metal. A 4 mm wire holds more copper, so quality here matters even more.
- Insulation grade: The cover around the copper. Plain PVC is the base, while FR and FR-LSH grades add fire safety and a little cost.
- Coil length: The metres on the reel. A longer coil holds more wire, so the total is higher.
- Brand and standard: A trusted brand built to IS 694:2010 carries a quality that a plain wire 4 mm price does not show.
4 mm Wire Per Metre and on a 90 Metre Coil
Wire is sold on a coil, so a per metre figure is really the coil total shared across its metres. When you see a 4 mm copper wire price 90 meter, that is the whole ninety metre coil, which looks larger but buys far more wire. Work out the metres your job needs first, then the coil that fits is the fair buy. A short coil can look cheaper only because it holds less.
Why Choose 4 mm Copper Wire
A 4 mm copper wire earns its place on heavier circuits for a few clear reasons. It has the capacity for a real load, it runs cooler under that load than an undersized wire, and good copper lasts for years at its joints. On a dedicated point like a geyser, that reliability matters more than saving a little on a thinner reel.
Common Uses of 4 mm Wire
A 4 mm wire suits dedicated and heavier circuits rather than general wiring.
- Geyser and water heater points.
- Larger kitchen appliances on their own circuit.
- Air conditioner points, where the run is short.
- Power sub circuits that carry real current.
4 mm Wire vs 6 mm Wire
When the load climbs, the choice is 4 mm or 6 mm. The table makes it clear.
Point 4 mm wire 6 mm wire Copper area 4.0 sq mm 6.0 sq mm Rough current About 26 A About 33 A Best for Geysers and heavier points Air conditioners and heavy loads
A geyser or a heavy point sits well on 4 mm. A larger air conditioner or a long, heavy run usually wants a 6 mm wire for its extra capacity. Match the size to the load, and compare only wires of the same size and grade.
Kundan Cab 4 mm Wires and Cables
The 4 mm size has a verified home in the Kundan Cab range. Its Copper CTS 4 X Single Core is listed up to 4.0 sq mm, built to IS 694:2010 in electrolytic grade annealed copper rated to 1100 volts, for heavy single core runs. The size also sits within house wires such as Green Wire, Safety Pro and Flexy Plus.
So there is a clear choice. For a dedicated home circuit, an FR or FR-LSH house wire at 4 mm fits, while heavier single core work points to the Copper CTS 4 X range. When several cores are bundled,view the full Kundan Cab range for every size.
FAQS
1. What is a 4 mm wire used for?
A 4 mm wire is used for geysers, heavier appliance points and dedicated circuits, carrying around twenty six amperes. It has more capacity than a 2.5 mm wire, which is why heavy points are wired at this size. A 4 mm wire price should be judged against a heavy or dedicated load.
2. Why is a 4 mm wire dearer than a 2.5 mm wire?
Because it holds more copper. A 4 mm conductor has a larger area than a 2.5 mm one, and since copper is the main cost, more metal lifts the 4 mm copper wire price directly. The larger size also carries a heavier load, so the extra cost buys real capacity.
3. Does Kundan Cab make a 4 mm wire?
Yes. Kundan Cab lists 4.0 sq mm within its Copper CTS 4 X Single Core range, and the size also sits within house wires such as Green Wire, Safety Pro and Flexy Plus. All are high purity copper to IS 694:2010. Confirm the product and length, then ask a Kundan Cab dealer for the current price.
KEY TAKEAWAYS
- A 4 mm wire price is set by the larger copper conductor, the insulation and the length, not the size alone.
- The 4 mm is a four square millimetre copper area, suited to geysers and heavier points.
- A per metre figure is really the coil total shared across its metres, so check the coil length.
- For the heaviest loads, step up to 6 mm rather than stretch a 4 mm wire.
- Kundan Cab covers 4.0 sq mm in Copper CTS 4 X and in house wires like Green Wire and Flexy Plus, all to IS 694:2010.
Wiring a geyser or a heavy circuit? Decide the copper grade, the insulation and the length you need at 4 mm, then ask a Kundan Cab dealer for the current price. Visit kundancab.in to match the right product to your circuit and enquire for live details.
