I live in a 2 story home built in 1937 with an upgraded 100 amp box in the basement. My problem is that all the old wiring is still in the home and in use except for what was replaced running through the basement and under the first floor. I know I don't have much info but I was wondering if anyone knows how much rewiring usually costs and If I should have the family home upgraded to 200 amp. Like I said some rewiring is already done but the people before me rigged alot of stuff and the old wiring is still present. Can any one give me a clue on what to do.