AC Short Circuit and Fire Risks in Summer: How to AC-Proof Your Home's Wiring

The main risk factors

Most AC-related electrical incidents trace back to a handful of preventable issues rather than the AC unit itself being unsafe.

• Old home wiring not rated for the continuous load an AC draws, especially in older independent houses
• Running the AC off a shared extension board instead of a dedicated point and circuit breaker
• No dedicated MCB for the AC, meaning a fault isn't isolated quickly
• Outdoor unit electrical connections exposed to moisture during storms without adequate weatherproofing
• Degraded wire insulation from years of heat exposure, especially on outdoor unit connections

How to actually AC-proof your home's wiring

Have an electrician confirm the AC is on its own dedicated circuit with an appropriately rated MCB — not sharing a circuit with other heavy appliances. Avoid extension cords for AC power entirely; it should run from a fixed point. If your home's wiring is more than 10–15 years old and you're installing a new or higher-tonnage AC, it's worth having the relevant circuit inspected rather than assuming old wiring can handle new load.

The seasonal check worth doing every year

Before summer, ask your AC technician (or an electrician) to check the outdoor unit's electrical connections for any corrosion or moisture damage from the previous year's monsoon — this is a small check that catches a meaningful risk factor before it becomes a problem during peak summer load.

Frequently asked questions