[Top] [All Lists]  [TowerTalk] Power Distribution  To: "" <>
Subject: [TowerTalk] Power Distribution From: "Jim Brown" <>
Date: Mon, 02 Aug 2010 09:54:45 -0700 List-post: <">> On Mon, 02
Aug 2010 11:08:25 -0400, Joe Subich, W4TV wrote:  > >> ##  If
the business's  don't get a neutral... then how do the > >>
business's obtain 120 vac ??  >Their supply is either 120/208
(e.g. wye or star) with neutral >being the center of the wye or
they need to install their own >480 to 240/120 transformer on
premesis.  That's ordinary 3-phase power.   The High Leg Delta
distribution that I described is 240V Delta. A  pure delta
configuration has no neutral. The High Leg Delta is  different
-- ONE side of the delta is center-tapped to provide a  neutral.
A single phase user gets THAT center-tapped leg. A 3- phase user
gets all three phases (and perhaps the neutral). There  is 208V
between neutral and the leg opposite the center tap.  That's the
High Leg. Also called Wild Leg.  High Leg Delta is VERY widely
used in cities and t