Path: utzoo!attcan!utgpu!watmath!att!tut.cis.ohio-state.edu!brutus.cs.uiuc.edu!apple!xanadu!michael
From: michael@xanadu.COM (Michael McClary)
Newsgroups: sci.electronics
Subject: Re: SUMMARY: 110/220 v question
Message-ID: <g7VE0#=michael@xanadu.COM>
Date: 21 Sep 89 15:20:29 GMT
References: <SAAF.89Sep19095936@joker.optics.rochester.edu>
Reply-To: michael@xanadu.UUCP (Michael McClary)
Organization: Xanadu Operating Company, Palo Alto, CA
Lines: 16

Saw an odd hookup once.  (Skating rink kinda northward in
Michigan, used a LOT of electric heat - back when juice was
cheap.)  Was like this:

                    Z
                   / \
                  /   \
                 /     \
                /       \
               /         \
              X-----N-----Y

Standard 110/220 at X/N/Y, and 3-phase 220 at X/Z/Y.  This let
them feed three times as many heaters for 50% more copper, using
standard 220v heaters.  The heaters didn't care if N(neutral)
(= ground) wasn't centered.