From: [email protected]
Date: Thu Feb 01 2001 - 13:07:04 PST
>John, are the equations swapped for the internal/external trace types? I would
>assumed the surface traces to be capable of carrying more current than the
>traces or have I missed something?
I had a typo in the comments in my spreadsheet, but the equations I used and the
ampacities were correct. The correct equations are:
> * For external traces I = 1500*thickness^0.72*width^0.75*deltaT^0.45,
> * For internal traces I = 750*thickness^0.72*width^0.75*deltaT^0.45,
> * I is the permissible current in Amps.
> * thickness in inches.
> * width in inches.
> * deltaT is permissible temperature rise in degrees C
John Barnes Advisory Engineer
**** To unsubscribe from si-list or si-list-digest: send e-mail to
[email protected] In the BODY of message put: UNSUBSCRIBE
si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
si-list archives are accessible at http://www.qsl.net/wb6tpu
This archive was generated by hypermail 2b29 : Tue May 08 2001 - 14:30:47 PDT