Anne:

The charts in IPC-D-275 are fine if your only concern is temperature rise.  If you have
concerns about the voltage drop through the circuit, my recommendation is the use of a
suitable table from the electrical industry to determine the loss through a wire of
equivalent size.  This usually requires converting the circuit cross section to
circular mils in the english (american) system.

If you're working with surge currents from a start-up or other transient condition, the
calculations become complicated and experimentation becomes the most effective tool.

Don Vischulis

Anne Ledger wrote:

> Good Afternoon Technet,
>
> Does anyone know how thick a trace is required to carry 25 amps in 1 oz
> copper?  How about 2 oz copper?  Let's assume it's .062 thick material.
> Need help ASAP.  Thanks in advance.
>
> Anne Ledger
> EMDS, Inc.
> [log in to unmask]

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