Re: [OT] ATX-PSU and amperage on connectors...
On Fri, Feb 29, 2008 at 02:21:07AM +0100, Michelle Konzack wrote:
> Hello Douglas,
>
> Am 2008-02-27 20:52:19, schrieb Douglas A. Tutty:
> > Here are the wire sizes according to my copy of the 2002 Canadian
> > Electrical cord (still in force), table 12 "Allowable Ampacity of
> > Flexible Cord and Equipment Wire (Based on Ambient Temperature of 30C"
> > Note that cables of 4 or more wires (e.g. if you shrink-wrap 4 drive
> > wires together) would be 80%.
> >
> > AWG Amp
> > ===========
> > 26 1
> > 24 2
> > 22 3
> > 20 4
> > 18 6
> > 16 8
> > 14 17
>
> This AWG thing is nice, since I don not know I in Europe...
> I am counting in mm²
Hi,
I googled and found this[0]:
gauge (ga) [3]
a traditional unit measuring the diameter (or the cross-sectional
area) of a wire. Various wire gauge scales have been used in the U.S.
and Britain. In traditional scales, larger gauge numbers represent
thinner wires. (For very thick wires, repeated zeros are used instead of
negative numbers, so gauges 00, 000, and 0000 represent -1, -2, and -3,
respectively.) In the American Wire Gauge (AWG) scale, 0000 gauge
represents a wire having a diameter of 0.46 inch and 36 gauge represents
a diameter of 0.005 inch (5 mils). Diameters for the other gauges are
obtained by geometric interpolation, meaning that the ratio between
successive diameters is a constant, except for necessary roundoff. Thus
n gauge wire has a diameter of .005·92((36-n)/39) inch. The metric wire
gauge number is equal to 10 times the diameter of the wire, in
millimeters; thus a metric 8 gauge wire has diameter 0.8 millimeters. A
table of wire gauge equivalents is provided.
The above formula did not paste correctly:
(36-n)
----
39
wire gauge(n)=0.005*92^ Inches
And this references this[1]:
Gauge |Washburn|British |Birmingham|American
Number| & Moen |Imperial|or |(A.W.G)
| |Standard|Stubs |or
| |(S.W.G) | |Brown &
| | | |Sharpe
14 | .0800" |.080" |.083" |.0640"
15 | .0720" |.072" |.072" |.0570"
16 | .0625" |.064" |.065" |.0508"
17 | .0540" |.056" |.058" |.0452"
18 | .0475" |.048" |.049" |.0403"
19 | .0410" |.040" |.042" |.0358"
20 | .0348" |.036" |.035" |.0319"
21 | .0317" |.032" |.032" |.0284"
22 | .0286" |.028" |.028" |.0253"
23 | .0258" |.024" |.025" |.0225"
24 | .0230" |.022" |.022" |.0201"
25 | .0204" |.020" |.020" |.0179"
HTH,
Kev
[0] http://www.unc.edu/~rowlett/units/dictG.html
[1] http://www.unc.edu/~rowlett/units/scales/wiregauge.html
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