Mike,
        22 awg solid wire has a diameter of approximately 0.025". It
therefore has a cross sectional area of 491 circular mils. To convert
circular to square mils, multiply by 0.7854. This gives 385 equivalent
square mils.
        Using IPC-2221 Fig. 6.4, 385 sq. mils in 2 Oz copper is equivalent
to a 0.150" trace. That said, you should be able to draw about 9 amps with a
10 degree C rise in temperature.
        I believe this conversion is correct, but it wouldn't hurt to double
check me.

Michael Hiteshew
Lockheed Martin NE&SS Marine Systems
[log in to unmask]


> ----------
> From:         Michael Lester[SMTP:[log in to unmask]]
> Reply To:     TechNet E-Mail Forum.;[log in to unmask]
> Sent:         Tuesday, January 30, 2001 2:30 PM
> To:   [log in to unmask]
> Subject:      [TN] 22Gauge Equivalent
>
> Does anyone have a simple formula, or even a suggestion, on a way to
> figure
> the  width of a line on two ounce foil that will equal the current
> carrying
> ability of a 22 gauge copper wire?
>
>

---------------------------------------------------------------------------------
Technet Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------