Speedy Petey said:Not necessarily. But....if the electrical system is that old that it is still fuses you would more than likely be well served to have the service upgraded.
Bear in mind, this is not anything that is the responsibility of the seller. It is not a required or madatory upgrade.
jbfan said:Yes. If you upgrade the min. is now 100 amps. But like Petey said. This is something you will have to take care of. I don't think you will be able to have the seller replace.