Understanding Wire Gauges: Which Size for Which Application

Using the wrong wire gauge is a fire hazard. An undersized wire carrying more current than its capacity will overheat, melt its insulation, and potentially cause a short circuit or fire. Oversized wires waste money. Getting the gauge right for each circuit is one of the most important electrical decisions in your home.

Used for LED light circuits and bell circuits where current draw is very low. Most modern homes in Gurgaon use 1.5 sq mm as the minimum for lighting circuits, but 1.0 sq mm is acceptable for short runs with a few LED bulbs. Carries up to 10 amps safely.

The standard wire size for all lighting circuits in Indian homes. Carries up to 14 amps, which is more than enough for a circuit with multiple LED lights, fans, and exhaust fans. Every bedroom, living room, and bathroom lighting circuit should use at least 1.5 sq mm wire. Available from Havells, Polycab, Finolex, and Anchor.

Used for standard power socket circuits — TVs, refrigerators, washing machines, microwaves, and other household appliances. Carries up to 20 amps. Each power socket circuit should be on a separate MCB at the distribution board. This is the most commonly used gauge for socket wiring in new Gurgaon apartments.

Required for air conditioners (up to 1.5 ton), larger kitchen appliances, and heavy-duty power tools. Carries up to 27 amps. Each AC should have a dedicated 4.0 sq mm line from the distribution board with its own MCB. For a typical 2-3 BHK in Gurgaon with 3-4 ACs, you'll need 3-4 dedicated 4.0 sq mm runs.

Used for geysers (15-25 litre), large 2-ton ACs, and the main incoming supply line from the meter to the distribution board. Carries up to 35 amps. Geysers draw significant current during heating — a dedicated 6.0 sq mm line with a 32A MCB is standard practice. HandyPanda delivers all wire gauges from Havells, Polycab, and Finolex across Gurgaon in under 60 minutes.