> From [email protected] Wed May 11 13:22:18 > 2011 > Date: Wed, 11 May 2011 14:21:30 -0400 > Subject: Re: Japan electrical power? > From: Jay Nakamura <[email protected]> > To: Robert Boyle <[email protected]> > Cc: [email protected] > > On May 11, 2011 10:09 AM, "Robert Boyle" <[email protected]> wrote: > > > > Hello, > > I know voltage varies from town to town and prefecture to prefecture. > > No, it doesn't. Japan has two systems, both 100v, western Japan has 60Hz, > eastern Japan has 50Hz.
'Nominal' voltage, that is. with relatively poor regulation. 'local' variation +/-10% (or more) is the norm. Handling +/-15% will cover practically all 'routine' volatage excursions. If I was designing, I'd spec for at least 25%, and probably "30% plus", variance.
