The answer to 'why is my junction box power surge' is that a power surge in a junction box is often caused by electrical overloads, faulty wiring, or malfunctioning electrical components. This can lead to increased voltage and current, potentially damaging appliances or even creating a fire hazard.
Some common symptoms of a power surge in a junction box include flickering lights, buzzing or humming sounds, and circuit breakers tripping frequently. To address this issue, you should first check the junction box for any loose connections, damaged wiring, or outdated components. If the problem persists, it's best to call a licensed electrician to properly diagnose and resolve the issue, as attempting DIY electrical work can be dangerous if you're not experienced.