4 Outdated and Unsafe Electrical Panels That Could be Fuse box. Fuse boxes are old electrical panels that use fuses instead of circuit breakers to protect your wires from becoming overloaded. When a circuit draws too much electricity, the fuse burns out and must be replaced. Why they’re unsafe: Fuses aren’t inherently unsafe. They work just like circuit breakers (except they can’t be reset and must be replaced.) Old Fuse Box- Is it safe? - Precision Home Inspectors The question that is always asked is if older fuse boxes are in fact a danger to the homeowner. While they are safe and still somewhat common there are a few bad apples in the mix, such as faulty panels. There are two common types of breaker panels, which are inherently bad: Federal Pacific Electric (FPE) and Zinsco, also known as Sylvania.