Sizing for house about to be rewired
I'm doing a bunch of rewiring in a 6,000 square foot house. Last update was probably 1960, so while it's not a total disaster we will be running new wire often. It has 1 kitchen with a couple wall ovens and 4 heating zones which will be upgraded to AC as well. So the big question - 200 amp service or 400 amp? My guess is that getting NStar (my power co) to upgrade to 200 is not too hard. The service is underground and though it looks like 100 now, they probably are compelled to give me 200. 400 - I bet they charge and charge a lot. Simple load calculators say we need 180A, which seems too close to 200 to feel good about, but not sure if they assume only incandescent, etc.
Thanks very much for any thoughts.