I live in a very old Victorian condo building. All units still have fuse boxes, not circuit breakers. My range died and I need to replace it. All modern ranges require a minimum of 40 amps, but the fuse box only has 30 amps (x 2) going to the range. So, I need to upgrade to a circuit breaker, right? HOWEVER, there are 15 units in this building, and everyone has an oven and everyone only has 30 amps maximum. How is this possible? Thank you.