Updating fuses to breakers
You'll need to call the local utility company first, and arrange to have the incoming service upgraded.
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Get the service upgrade done first to ensure your project runs smoothly and efficiently. Will you need to replace the fuses there, or can they be left alone?
If the main fuses remain as they are, the supplies and installation are fairly simple.
Fuse box systems may be grandfathered, meaning that elements of the system do not necessarily need to meet current building codes as long as they are left alone.
If you start to replace any part of these grandfathered structures, the entire system will need to be reassessed and redone to meet existing codes.Upgrades tend to spread, and changing all of the important elements in your electrical system may be the best plan overall.