For a geyser or 1.5-ton AC use 4.0 sq mm Finolex Flamegard FR-LSH on a Legrand DX3 DP 20 or 25 A C curve MCB. For a 2-ton AC use 6.0 sq mm on a DP 32 A. Each heavy appliance gets its own circuit.
The pairing
| Appliance | Finolex FR-LSH 90 m coil | Legrand DX3 MCB |
|---|---|---|
| Geyser 2 to 3 kW | 4.0 sq mm, ₹5,676 | DP 20 A C curve |
| 1.5-ton AC | 4.0 sq mm, ₹5,676 | DP 20 or 25 A C curve |
| 2-ton AC | 6.0 sq mm, ₹8,621 | DP 32 A C curve |
Mount Cable India selling prices per 90 m coil, current to the Finolex list effective 4 September 2026. Taxes extra as applicable.
| Legrand DX3 | MRP | Mount Cable price |
|---|---|---|
| SP MCB 6 to 32 A, C curve | ₹494 | ₹173 |
| DP RCCB 40 A 30 mA | ₹6,360 | ₹2,226 |
Why heat matters here
These circuits carry high current for hours. That is where an under-sized or counterfeit wire runs hot, so it is where the wire grade, the size and a genuine coil matter most. For the longest runs, Finoultra's heat-resistant e-beam insulation is worth considering.
Finolex cartons carry two QR codes: an outer code on the carton label and an inner code you reach only after opening. The outer one proves the carton is registered with Finolex; the inner one proves the contents are what Finolex packed. Scan both, at your site, before you pay. Our Finolex wire scanner does it in the browser.
Talk to us before you buy
Not sure yet? WhatsApp your electrician's list or a photo of the memo to 88676 76700. Mount Cable India replies within 60 minutes with the right grade and brand for each point and an itemised price. No obligation to buy from us.