The answer to 'why is my fuse box power surge' is that a power surge in the fuse box is often caused by an electrical overload or short circuit in your home's wiring system. This can happen when too many high-powered appliances or devices are running at the same time, or if there is a problem with the wiring itself, such as a loose connection or damaged insulation. Symptoms of a power surge include flickering lights, tripped circuit breakers, or electrical devices suddenly shutting off.
To solve the problem, you'll need to identify and address the root cause. This may involve reducing the electrical load on the circuit, checking for and repairing any wiring issues, or upgrading your electrical panel or service. However, it's important to note that working with electrical systems can be dangerous, so it's generally best to call a licensed electrician to diagnose and fix the problem, especially if you're not comfortable doing electrical work yourself.