Jimmy;
May seem like a dumb question, but I gotta ask it:
Did he "plate up" with copper or solder?
Sounds like he may have used solder (tin / lead), which will only carry
about 16% of the current that copper will carry.
. . . had to ask . . .
Respecting the remainder of the question, I have asked it before in numerous
different manners and in numerous different forums, and have always been met
with dead silence whenever I ask the question.
I will try and dig out the last incarnation of the question, and if I can
find it, I will repost it here, possibly tomorrow.
I still want to know the real answer to that question, from someone
qualified to answer it (as opposed to opinions based on the time of the day
and phase of the moon).
JaMi
----- Original Message -----
From: "Jimmy Blier - Paradox" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, April 19, 2006 11:43 AM
Subject: [DC] The capacity of electric plating to carry current
Hi everyone,
I'm facing a dilemma regarding the capacity of electric plating to carry
high currents.
We made a PCB that had to handle a current of 30 amps.
We made some calculations and figured that we needed 3 once copper thickness
to achieve the requirements.
The PCB manufacture didn't have in stock the required thickness, so they
proposed to use a PCB 2 once thick and simply electro plate the missing
once.
Since we were short in time we agreed to the proposal.
The results we got are completely off the track according to what we
expected.
What could be responsible for this?
Does electric plating has the same current capacity or does it differ from
the plain old copper on the PCB?
Or could this be the result of a calculation error from our part?
If so can anyone tell me were I can find more accurate charts and data to
establish what need for this high current design?
Cheers,
--
Jimmy Blier
Senior PCB designer
Paradox Security Systems Ltd.
780 Industrial Blvd.
St-Eustache, Quebec, Canada J7R 5V3
Phone : 450.491.7444 Fax : 450.491.3454
<mailto:[log in to unmask]>
<http://www.paradox.ca/>
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