In our current place, we have 40A, and it's impossible to run the microwave oven together with the kids' air conditioner. Can't use the toaster and the microwave together either... For our new home, we were advised to get 60A, which is the maximum normal TEPCO breaker capacity. We found the TEPCO calculator quite useful to figure what appliances can run together within a given ampere allowance. Also, we need to bear in mind that from 10A to 60A, changing your breaker's capacity can be done free of charge, but the monthly demand charge will increase as follows:
Now if we you want too go above this, to say 80A or 100A, we'll need to get a different account. There is a fee of about 20,000-30,000 yen to enable this service and the monthly charge will also increase as follows: 80A: ¥2,184; 100A: ¥2,730. Note that if you ever want to change back to 60A or lower, a disable fee of about 20,000-30,000 yen fee will also be charged. TEPCO's Service Guide can help dispel a few mysteries.
2 comments:
I've been trusting our architect that 60A would be enough, but I'm going to double check with him. Thanks for bringing this up because this is definitely one of our big pet peeves in our current home.
Kichijoji Dude,
I think there will be a testing period in our new home for a while to see whether or not a higher amperage is needed. After 60A, the fee for modifying amperage is high so it's something we need to be sure about... Also, I haven't quite figured out is how the various loads are distributed or if we can have a say in that. This area definitely needs more exploring.
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