ok folks. This topic needs to be clarified.
With respect to each other, by definition, two conductors have a potential
difference at 180 degrees. Period. The 90 degree stuff may pertain to current
but
not to voltage. You would need a four-phase transformer to get 90 degree
phasing and
simply it
I read in !emc-pstc that Price, Ed wrote (in
) about '2
Phases in North America', on Thu, 13 Dec 2001:
>At this point, you still have a single-phase system. The voltage is
>240 Vrms, from one "hot" line to the other. The voltage from each
>hot line to neutral (and ground) is 120 Vrm
I read in !emc-pstc that Tania Grant wrote (in
) about 'Sometimes product
safety just isn't enough', on Fri, 14 Dec 2001:
>And we have strayed here from the subject matter (although I don't
>mind!). Just how much does a product designer and a product
>safety professional owe to m
I read in !emc-pstc that POWELL, DOUG wrote (in
) about 'What
happened to the IEC60417 symbol library?', on Fri, 14 Dec 2001:
>But of course the link is dead. Does anyone know if it moved?
Go to http://www.iec.ch and contact the IEC directly. There is a new
URL.
--
Regards, John Woodgate, OOO
I read in !emc-pstc that Nerad, DarenHS-SNS
wrote (in <47c2376d5478d4119fa800508be390ee025be...@hsmx53nt.rkd.snds.co
m>) about 'Sometimes product safety just isn't enough', on Fri, 14 Dec
2001:
>and that of Wile E. Coyote and his equipment from the ACME
> (obviously,
>most of i
Surely IEC 60417-1 and ..617 are different standards? The former is
"Graphical Symbols for use on EQUIPMENT..." (my emphasis). Whereas:
IEC 60617-1GRAPHICAL SYMBOLS FOR DIAGRAMS [about 13 parts, -1 to -13]
IEC 60617-1
(Still interesting, I'd missed that announcement about IEC 60617.)
Its now available from IEC (at a price - copyrighted you know):
IEC 60617 Graphical Symbols database
The IEC 60617 Graphical Symbols for Diagrams database
(http://domino.iec.ch/symbols) has now been launched officially.
The database offers users a dynamic facility featuring some 1 400
symbols in
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. Th
This is rather similar to asking what the first harmonic of the power line
frequency is. (grin!)
Cortland
"Jayasinghe, Ryan" wrote:
> 180° out of phase?
>
---
This message is from the IEEE EMC Society Product Safety
Technical Committee
Gotcha!
-Original Message-
From: Robert Macy [mailto:m...@california.com]
Sent: Friday, December 14, 2001 4:40 PM
To: Pettit, Ghery; James Collum; emc-p...@majordomo.ieee.org
Subject: Re: Sometimes product safety just isn't enough
AR!!
I went there, read down through much, befo
AR!!
I went there, read down through much, before it soaked in.
- Robert -
-Original Message-
From: Pettit, Ghery
To: 'Robert Macy' ; James Collum
; emc-p...@majordomo.ieee.org
List-Post: emc-pstc@listserv.ieee.org
Date: Friday, December 14, 2001 4:15 PM
Subject
I think it's worth mentioning interpretations of the
definition of "end user" in 950. In my opinion, "end
users" are obviously people who use the equipment
and are also not expected to be aware of the hazards.
That's why, in my opinion, the thread about safety
critical parts was so difficu
"Andre, Pierre-Marie" wrote:
>
> So has anybody some thoughts or argument on the measurement
> or evaluation of an Compliance Group ?
Well, I'd hate to let the dirty little secret out of the bag for those
of
us who would fall under such and evaluation. Important in such an
evaluation would be t
I've dropped the picture into a Word document and titled it,
"You Can Design Only So Much
Common Sense Into A Product".
Then at the bottom, put
Hand drill = $35
Metal ladder = $50
Bare feet on metal ladder in pool ... Priceless
and posted it outside my cubicle.
It's been
Now, you do need to worry about some of these obscure chemicals. There is
an entire web page devoted to the hazards of DHMO, di-Hydrogen Monoxide.
www.dhmo.org Check this out. It could save someone you love.
Ghery Pettit
Intel
-Original Message-
From: Robert Macy [mailto:m...@califor
In deference to the warning label on the peanuts bag. Some people have life
threatening allergies to peanuts and take warnings such as that and warnings
on cookies, etc very seriously. But then again, you'd think with the main
label "Peanuts" would be sufficient. Perhaps, someone is making pean
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