New homes have circuit breakers but many older homes have a fuse box that which fuses screw into sockets similar to light bulb sockets.
The fuse box is a metal box which houses the incoming electrical service. It controls the circuits to different locations in the house. There is a cover over the box for the safety and there are fuses in the box which give protection against overcurrent. There are threaded sockets in the fuse box which carry the fuse.
There are times when you face some problems with the fuse box. In that case, you either have to repair it or replace it. If you are upgrading the wiring system of your home or you need to install more wiring for an extension, it becomes essential to replace the fuse box. Remember – you should always call an electrician to do this job as the task is challenging and requires proper knowledge and experience.