I was curious and compared the 16.3 mm with a piece of 12 Gauge wire. 12
Gauge wire has about 2.84 times the copper than the recommended 2 ounce
copper on an external layer and about 7.4 times for an inner layer.
For those who don't know, 12 gauge wire is typically used in house/building
wiring and has a current rating between 20 and 30 amps in those
applications.
Tom Dagostino
971-279-5325
tom@xxxxxxxxxxxxxxxxx
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of Tim Smith
Sent: Thursday, December 03, 2015 4:23 PM
To: hariniparthiv@xxxxxxxxx
Cc: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: High Voltage AC trace width calculation
It depends on what temperature rise you you expect as well as the length of
the trace.
Any PCB trace can handle 30.0 A; however the smaller the trace thickness the
higher the temperature of the trace will be. If the temperature rises too
much, the trace will burn out.
Given that 30.0 A is a fair amount of current to route on a PCB, 16.3 mm
(645 mils) is not unreasonable.
On Fri, Dec 4, 2015 at 10:39 AM, Harini Ranjith <hariniparthiv@xxxxxxxxx>
wrote:
hi Experts,
I need some guidance on how to calculate the trace width for High
Voltage AC line (80-240V) in PCB and maximum current shall go to 30A.
If I use conventional Trace width calculators available in web, it
calculates to very large trace widths 645mills in external layers and
248mills in internal layers with 2oz copper thickness.
Thanks in Advance
Harini
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