Hi all, Even though I am an electrical engineer, I'm terribly confused by this post. I have always believed (and on a few occasions measured) the standard US home system feed. There is no choice of 240 volts. The "220" volt feed used by larger devices is two 118 VAC phases 120 degrees apart. The math seems to work.
WRT Cortland's post, I guess I don't see ground (or close to it "neutral") as having a "phase". If that is believable, then a single "phase" system is not so hard to believe. Just a few thoughts, Brent DeWitt -----Original Message----- From: [email protected] [mailto:[email protected]]On Behalf Of bogdan matoga Sent: Friday, December 14, 2001 3:12 PM To: Cortland Richmond Cc: Robert Johnson; 'Barry Esmore'; 'EMC-PSTC Forum' Subject: Re: 2 Phases in North America Dear Esquire: May I suggest that you partake in a course called "Basic Electricity 001"? Bogdan. Cortland Richmond wrote: By the definition below, *single phase* AC would require one wire with no return. I want to see THAT one work before I pay for it! Cortland Richmond (the above being my own opinion, not a statement of my employer's) Robert Johnson wrote: This has just reopened the old two phase controversy again. Ed has done a good job of describing the systems in detail, but be careful with the terms. Ask an electrical engineer about a 120/240 volt home service and he will call it a two phase system. Two phases 180 degrees out of phase is technically correct. ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
