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*To*: tesla-at-pupman-dot-com*Subject*: FW: Awg formula, (correction to previous post)*From*: "Tesla list" <tesla-at-pupman-dot-com>*Date*: Tue, 06 Feb 2001 20:40:31 -0700*Resent-Date*: Tue, 6 Feb 2001 20:42:06 -0700*Resent-From*: tesla-at-pupman-dot-com*Resent-Message-ID*: <_3hsXC.A.5AG.GQMg6-at-poodle>*Resent-Sender*: tesla-request-at-pupman-dot-com

Original poster: "John H. Couture by way of Terry Fritz <twftesla-at-uswest-dot-net>" <couturejh-at-worldnet.att-dot-net> Bart - The MCM stands for thousands of circular mils, not millions. For example 1000 MCM means one million circular mils or a bare solid wire one inch in diameter. However, a solid wire this size has probably never been manufactured. Normally wires larger than #6 AWG are stranded. This means that a 1000 MCM bare wire will always be stranded and greater than one inch in diameter because of the stranding. The area of the wire, however, will equal one million circular mils. This is true for both copper and aluminum wires that are used for electrical circuits. I hope I have it right this time. John Couture --------------------------------- -----Original Message----- From: John H. Couture [mailto:couturejh-at-worldnet.att-dot-net] Sent: Tuesday, February 06, 2001 4:02 PM To: Tesla list Subject: RE: Awg formula, was "New formula for secondary resonant frequency" Bart - I obtained the equation many years ago from the Simplex Wire & Cable Co. You did a lot better than many other people in past years trying to come up with a different equation. Note that for 4/0 AWG wire that x = 0 and dia = .46 inches. All equations have to take 1/0, 2/0, 3/0, and 4/0 (x=3,2,1,0) into consideration. The AWG table then changes to MCM for larger wires. The MCM stands for millions of circular mils. A circular mil is the area of a circle one mil in diameter. A solid wire one inch in diameter has an area of one million circular mils. One square inch equals 4/pi x 1,000,000 CM = 1,273,200 CM . It can be confusing. However, it does avoid decimals in specifying wire sizes, a lot of which I did in the past. John Couture ---------------------------------- -----Original Message----- From: Tesla list [mailto:tesla-at-pupman-dot-com] Sent: Tuesday, February 06, 2001 6:49 AM To: tesla-at-pupman-dot-com Subject: Re: Awg formula, was "New formula for secondary resonant frequency" Original poster: "Barton B. Anderson by way of Terry Fritz <twftesla-at-uswest-dot-net>" <tesla123-at-pacbell-dot-net> John C., Thanks for posting. I remember trying to find this info a long time ago and could never get data. I eventually got together with someone at work to derive a formula (which was successful). Now it seems there are three or four equations floating around. Isn't this list great! BTW, when you state "the standard", I assume you grabbed the equations from wire manufacturers? Take care, Bart Tesla list wrote: > > Original poster: "John H. Couture by way of Terry Fritz > <twftesla-at-uswest-dot-net>" <couturejh-at-worldnet.att-dot-net> > > I understand the standard equation for the AWG is > > Dia inches = .46/(1.122932)^x > > where x = wire gauge + 3 > > Example # 24 AWG x = 27 > > dia ins = .46/(1.122932)^27 = .02010 ins > dia mm = .02010 * 25.4 = .51054 mm > > # 18 AWG x = 21 > > dia ins = .46/(1.122932)^21 = .04030 ins > dia mm = .04030 * 25.4 = 1.02362 mm > > John Couture > > ------------------------------- > > -----Original Message----- > From: Tesla list [<mailto:tesla-at-pupman-dot-com>mailto:tesla-at-pupman-dot-com] > Sent: Monday, February 05, 2001 6:31 AM > To: tesla-at-pupman-dot-com > Subject: Re: Awg formula, was "New formula for secondary resonant > frequency" > > Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>" > <paul-at-abelian.demon.co.uk> > > Bart wrote: > ------------------------------- snip

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