Using the correct wire size is the most important step for a safe electrical installation. A wire that is too thin heats up, wastes power and can become a fire risk. Here is a simple guide used by many electricians for homes in India.
Common house wire sizes and their uses
| Wire size | Common use |
|---|---|
| 1.0 sq mm | Light points, small lighting circuits |
| 1.5 sq mm | Lights and ceiling fans |
| 2.5 sq mm | Power sockets, fridge, washing machine |
| 4 sq mm | Air conditioner, geyser, heavy appliances |
| 6 sq mm | Main line / sub-main to the distribution board |
This is general guidance. The right size also depends on the total load and the length of the wire run — always follow your electrician's advice and the wiring code.
Check these points before you buy
- ISI mark (IS:694) — confirms the wire is made to the Indian standard.
- FR insulation — flame-retardant PVC slows the spread of fire.
- Copper quality — bright, annealed electrolytic copper carries full current.
- Full length — a standard coil is 90 metres.
- Colour coding — separate colours for phase, neutral and earth make wiring safe to maintain.
Kanak house wires are ISI marked, FR PVC insulated and available in all common sizes and colours. See Kanak house wires or call us for the latest price.