The answer to 'why is my junction box circuit overload' is that the circuit is drawing more electrical current than it is designed to handle. This can be caused by too many devices or appliances connected to the circuit, a short circuit, or a faulty electrical component. Symptoms include flickering lights, frequently tripping circuit breakers, and warm or hot electrical outlets.
To troubleshoot, start by unplugging or turning off any devices connected to the overloaded circuit. Check for any signs of a short circuit like sparks, burning smells, or damaged wiring. If the problem persists, you may need to have a professional electrician inspect the junction box and circuit to identify and fix the root cause. Attempting to bypass or tamper with the circuit breaker is extremely dangerous and should never be done.