[114805] in North American Network Operators' Group
Re: Why choose 120 volts?
daemon@ATHENA.MIT.EDU (Ricky Beam)
Tue May 26 20:51:18 2009
Date: Tue, 26 May 2009 20:50:39 -0400
To: "Chris Adams" <cmadams@hiwaay.net>
From: "Ricky Beam" <jfbeam@gmail.com>
In-Reply-To: <20090526235142.GB869478@hiwaay.net>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Tue, 26 May 2009 19:51:42 -0400, Chris Adams <cmadams@hiwaay.net> wrote:
> Isn't 208V usually provided as a connection across two phases of a 3
> phase circuit? In that case, you get 120V by going between one phase
> and neutral (no transformer required).
Indeed it is. If you want to see it yourself, measure the voltage between
"hots" on different circuits. I see 208-212V depending on the legs (they
aren't evenly loaded.) This is easier to do in a data center, but with a
long extention cord it can be done with the office. :-) (of course, having
the building wiring diagram(s) makes for a short hunt.)
--Ricky
