Electrical distribution fuse panels ( as shown in Figure 2) have become obsolete and in many jurisdictions a homeowner cannot get home insurance if they have a fuse panel installed.

The basic electrical service coming into your home will look something similar to Figure 3:

Figure 3 - Residential electrical service configuration including meter, main disconnect and load center or distribution panel

If you have a fuse panel then the main disconnect will most likely have cartridge fuses installed, rated at the load acceptable for the home.

If you have sufficient power, and only want to change the current fuse panel to a circuit breaker panel, leaving the main disconnect as it is with the cartridge fuses, then the electrical parts that you require can be obtained at most of the big box home improvement stores, online, or at an electrical wholesale. 

Make a list of the number and sizes of circuit breakers that you will require.  The breaker size is based on the gauge of the wire that is being used to run from the distribution panel to the device or appliance.

Do not assume that the screw-in fuse rating is correct for the wire size or circuit.  People have a tendency to increase fuse amperage ratings as time progresses.

Charts on correct wire gauges for different amperes.

Purchase a panel that has more circuits spaces than you currently require so that you will have available spare breaker positions for future additions.

There should never be more than one wire on any fuse or breaker terminal.  If there is more than one wire on a terminal count each wire as a separate circuit.

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