Fuse to Breaker upgrade.
100 to 200 amp upgrade.
For insurance purposes upgrading from fuse to breaker decreases premiums.
Because it is easy to mistakenly install a higher fuse size, will allow a much higher current to flow through a lower rated cable, damaging it by overheating the insulation and catching fire.
During the service panel upgrade, the grounding is also upgraded if required to latest ESA code requirements. Proper bonding to gas and water is also verified and corrected
ServUElectric - Reliable Electrical Services