Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!lll-lcc!mordor!joyce!zodiac!deimos!jshelton
From: jshelton@deimos.ADS.COM (John L. Shelton)
Newsgroups: sci.electronics
Subject: Re: 220 vs. 110 motor efficiency
Keywords: power
Message-ID: <7464@zodiac.UUCP>
Date: 5 Apr 89 05:21:49 GMT
References: <3272@ihlpm.ATT.COM> <1173@oswego.Oswego.EDU>
Sender: news@zodiac.UUCP
Reply-To: jshelton@ads.com (John L. Shelton)
Organization: Advanced Decision Systems, Mt. View, CA (415) 960-7300
Lines: 15

>In article <3272@ihlpm.ATT.COM> wrv@ihlpm.ATT.COM (Vogel) writes:
>>Over the weekend I had a conversation with the local pool supply
>>company service person.  We got on the subject of pumps, and he asked
>>me if my pump was ok, and how it was connected.  I told him it was connected
>>to 110V (by previous owner), but it could also run at 220.  He said I
>>should convert it, that this would give a great savings in the power bill.
>>So somebody please tell me, is the pool guy whacko, or am I missing
>>something?

I suspect your pool person was mistakenly thinking of 208v three-phase
power, which is much more efficient for motors than single phase as
provided by 110v and 220v.  I believe the current losses in wire
around the house will not make a large efficiency difference in your case.

=John=