Japan electrical power?

Robert Boyle robert at tellurian.com
Wed May 11 14:08:00 UTC 2011


This is sort of off-topic, but no where near as much as half of the 
topics on NANOG. It is relevant to netops for anyone who has a 
presence in Japan. Does anyone on NANOG have firsthand in-depth 
knowledge of the electrical system in Japan? I know voltage varies 
from town to town and prefecture to prefecture. It seems most is 
90V-110V. Do most homes and businesses have a single leg or do they 
have 200-220V available? Are most circuit breakers 15A? Do they use 
20A anywhere? What is used in commercial settings? What is the 
typical service to a home? 60A, 100A, 200A? I have searched, but 
haven't found enough definitive info to be useful. I am designing 
some new equipment and Japan is the worst case scenario from a power 
standpoint because they use such a low line voltage. If my gear works 
in rocky & mountainous low-voltage Japan, it will work anywhere. Any 
information or good links would be appreciated. I can't give out any 
info on the new gear yet until some key IP is protected. It doesn't 
compete with anything on the market today. Thanks for any help anyone 
can give. Domo arigato!


"Well done is better than well said." - Benjamin Franklin

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