AC Load & Circuit Safety CalculatorWire Gauge + MCB Size for Multiple ACs
Add all ACs on one circuit — instantly get total electrical load in watts and amps, safe wire gauge, MCB size, and whether your current wiring can handle it safely as per Indian standards.
Startup Surge Accounted
Fixed-speed ACs draw 5–7× running current at startup. Inverter ACs draw only 1.5–2×. We factor this into MCB and wire sizing so your circuit does not trip on every startup.
BEE-Based Watt Data
Actual running wattage differs from nameplate power. We use BEE-certified average consumption data by tonnage and star rating — not marketing peak values — for accurate load calculations.
IS 732 Wire Standards
Wire sizing follows IS 732 (Indian Standard for wiring cables) with 80% continuous load derating. MCB sizing follows IS 8828 with appropriate startup surge headroom for motor loads.
AC Load & Circuit Safety Calculator
Add your ACs and other appliances — safety results update live.
Air Conditioners on This Circuit
Other Appliances on Same Circuit
Optionale.g., fans, lights, fridge sharing the same circuit
Load Summary
Your circuit load is within safe limits. The recommended wire and MCB can handle your connected AC load comfortably.
Full Circuit Specification
Running 2 ACs on one circuit increases wire heating and MCB trips. A dedicated 20A circuit per AC (2.5mm² wire + 20A MCB) costs ₹1,500–2,500 per AC and is the safest, most reliable approach recommended by electricians.
Common AC Circuit Configurations
Quick reference for typical Indian household AC wiring setups
| AC Configuration | Total Load | Current (A) | Min. Wire Gauge | MCB Size | Notes |
|---|---|---|---|---|---|
| Single 1T Inverter AC | 680 W | 2.96 A | 2.5 mm² | 10A | Ideal — own circuit |
| Single 1.5T Inverter AC | 980 W | 4.26 A | 2.5 mm² | 16A | Most common setup |
| Single 1.5T Fixed-Speed AC | 1,300 W | 5.65 A | 2.5 mm² | 20A | Type-C MCB needed |
| 2× 1.5T Inverter AC | 1,960 W | 8.52 A | 4.0 mm² | 16A | Recommend 2 circuits |
| 2× 1.5T Fixed-Speed AC | 2,600 W | 11.3 A | 4.0 mm² | 25A | Separate circuits safer |
| 3× 1.5T Inverter AC | 2,940 W | 12.8 A | 6.0 mm² | 25A | Dedicated circuits each |
| 1T + 1.5T + 2T Inverter | 2,960 W | 12.9 A | 6.0 mm² | 25A | Mixed load circuit |
| 2× 2T Inverter AC | 2,900 W | 12.6 A | 6.0 mm² | 25A | Large room or hall |
Wire Gauge Capacity (IS 694 — PVC Copper)
Continuous ampacity at 40°C ambient, 80% derating factor applied
Frequently Asked Questions
Circuit safety, wire sizing, and MCB selection for Indian ACs
Technically yes, but it is not recommended. Two 1.5T inverter ACs draw around 8.5A running — manageable on a 4mm² wire with a 20A MCB. However, a shared circuit means if one AC trips the MCB, both go off. Separate dedicated circuits (2.5mm² + 16A MCB each) are the standard practice in India for reliability and safety.
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