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CD Burning with High Voltage

Vid of HV supply burning a CD

formatting link

Is this a good example of creepage?

Coollll how the arc jumps around. I guess it strives for the path of least resistance. If the arc eats in too far, it jumps to a better conduction path.

After the sparks stop, there is still power. Yet the rest of the CD doesn't burn.. The carbon track is more conductive than the remaining metal? Does molten polycarbonate conduct? Or perhaps the carbon track (from decomposed polycarbonate) is loading the HV supply.. Dunno..whatever...just some cheapo HV entertainment.

D from BC British Columbia Canada.

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D from BC
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No. The metal is a low resistance path and remains that way. The arc burns through the plastic covering and, once that is burned, becomes a lower resistance path.

The point of combustion is the lowest resistance path from the charred surface to the metal layer underneath. The arc will persist at that point until the fuel at that point runs out.

The combustion products do.

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Paul Hovnanian	paul@hovnanian.com
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Procrastinators: The leaders for tomorrow.
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Paul Hovnanian P.E.

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