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Load imbalance during AC startup, earthing resistance, and aged aluminium wiring: how certified electricians troubleshoot persistent circuit breaker trips.
If your miniature circuit breaker (MCB) trips repeatedly when switching on an air conditioner, geyser, or microwave, it is a crucial safety warning rather than a nuisance. In older residential properties, legacy aluminium wiring struggles with modern inductive electrical loads.
Key causes include improper phase balancing across the distribution board, neutral-to-ground leakage, and weakened thermal trip mechanisms in aging circuit breakers. A certified electrician uses digital clamp meters to measure actual current draw and rebalances the circuit safely.