A breaker trips for three reasons: the circuit is genuinely overloaded, there is a short or ground fault on it, or the breaker itself has failed. Resetting once after unplugging loads is reasonable diagnostics. A breaker that trips instantly, trips with nothing running, or feels warm is reporting a fault, and repeatedly forcing it is how a protection device becomes a fire starter. The tracing order is panel, then the circuit's devices and junctions, and the finding is usually a specific device, a damaged conductor, or an appliance confessing. That visit is a repair, not a mystery.
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