Technet:

I am looking for information on how to convert electrical surge voltages
into minimum spacing requirements.  I would like to use the "Electrical
conductor Spacing" charts in the IPC design documents, but I am pretty sure
they do not apply to surge voltages.

We are looking at withstanding lightning induced voltages on our inputs.  If
we make an assumption that the electronics upstream from my device will only
pass surges of voltages less that 1500 V,  what spacing should I use.  For
surges greater that 1500V, we are going to assume the upstream electronics
will 'Blow up", grounding the surge, or (hopefully) not sending it down to
our device at any rate.  How would it change if the surge voltage changes to
2000 V, 1000V, 500V?

Sounds like a college home work question in an upper level Electrical
Engineering class.   Too bad I graduated with a Chemical Engineers degree.

George Franck

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