The answer to 'why is my electrical wiring circuit overload' is that your electrical circuit has exceeded its maximum capacity, causing the circuit breaker to trip or the fuse to blow. This is a common issue that can be caused by several factors, including too many devices or appliances drawing power from the same circuit, faulty wiring, or a problem with the circuit breaker or fuse itself.
Some common symptoms of an overloaded circuit include flickering lights, frequently tripping circuit breakers, and outlets that feel warm to the touch. If you're experiencing any of these issues, it's important to address the problem right away to prevent potential fire hazards or further damage to your electrical system.