The answer to 'electrical wiring circuit overload' is that a circuit overload occurs when too much electrical current flows through a circuit, causing the circuit breaker to trip or the fuse to blow. This can happen when you have too many high-wattage appliances or devices running on the same circuit.
Common causes include running multiple large appliances like an air conditioner, clothes dryer, and oven at the same time, or having too many devices plugged into the same circuit. Symptoms include flickering lights, outlets that don't work, or the circuit breaker tripping. Solutions include reducing the load on the circuit, upgrading the circuit breaker or wiring, or having an electrician install additional circuits.