The Types of Circuit Protection for your home
If your house has ceramic or plug in fuses, then you really need your fusebox upgraded to the current standards.
Ceramic fuses (SERF-semi-enclosed re-wireable fuses) are old school forms of electrical protection for a home. These are the sort where you run fuse wire around some screws (usually in the dark while holding a torch) before plugging them back into your fuse box. They provide short-circuit and overload protection, and provide limited protection to your property and no protection from electric shocks.
Source : Upgrading Your Old Ceramic Fuses