Fuse boxes are typically constructed of metal and feature a small, hinged door. Opening the door, the consumer gains access to the inside of the box, where fuses are can be installed or replaced.
A number of sockets, meant to receive fuses, are located inside the fuse box. These threaded sockets are similar in appearance to incandescent light bulb sockets and are known as "Edison" sockets.
A number of differently rated types of fuses can be fitted into fuse boxes. The circuits connected to a fuse are rated for specific amperages; for example, a 15-amp circuit should be connected to a 15-amp fuse. Using an improperly rated fuse can be dangerous and cause a fire. Before changing a fuse, a consumer should first cut the power to the fuse box, to reduce the risk of electrocution.