Reasons to Install a Subpanel in Your Home - The Spruce This panel may be a fuse panel or a circuit breaker panel. These panels have certainly changed over the years. Either way, its job is to protect the home's wiring from overload via either fuses or circuit breakers. The fuses are designed to take a predetermined amount of current and then the fuse I am replacing a sub panel fuse box with a new breaker box Jul 26, 2010I am replacing a sub panel fuse box with a new breaker box in the detached garage for my cottage which was built over 60 years ago. coming into the fuse box presently are 2 cables each containing what appears to be #10 black, red and white.