How To Check a Fuse Box - Home Repair & Home Improvement L ocated inside or outside of your home is a fuse box that contains a fuse for each of your home's circuits. A fuse provides protection for each of your electrical circuits by stopping the flow of current if an overload or fault occurs. How to Replace a Circuit Breaker Fuse | DoItYourself Step 1 – Open the Fuse Box Wear rubber soled shoes and ensure the floor beneath the circuit breaker box is dry to minimize the risk of injury. To start, remove the circuit breaker box cover by unscrewing the corners with a screwdriver. Then, make sure to push the main electricity switch, to the individual fuses, into the “off” position.