From nanog-bounces+bonomi=mail.r-bonomi.com@nanog.org Wed May 11 13:22:18 2011 Date: Wed, 11 May 2011 14:21:30 -0400 Subject: Re: Japan electrical power? From: Jay Nakamura <zeusdadog@gmail.com> To: Robert Boyle <robert@tellurian.com> Cc: nanog@nanog.org
On May 11, 2011 10:09 AM, "Robert Boyle" <robert@tellurian.com> 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.