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Re: Can dust inside an Apple IIgs catch fire?
Il giorno domenica 3 febbraio 2013 18:49:27 UTC+1, Michael J. Mahon ha scritto:
> Riccardo <rigreco.grc@gmail.com> wrote:
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> > Hi Guy,
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> > Take a look, this is the video experimental of "Tracking" electrical phenomena.
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> > https://plus.google.com/photos/109178844091109135311/albums/5840661035299613937?authkey=CLfE973o5MiLLg
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> > Ric.
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> I've never seen evidence of this where the voltages are less than 1000
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> volts. Not likely in an Apple II system unless it spent a lot of time in a
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> conductive dust environment or salt spray!
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> -michael - NadaNet 3.1 and AppleCrate II: http://home.comcast.net/~mjmahon
Is a possibility. This is a slow phenomenon, but it accelerates over time as a chain reaction, does not need a polluted environment overly. The small flow of current between the parties at different potential (on surface of dielectric) progressively alters the properties of the insulator (reduce the Resistance), so that the leakage current increases up to the final flash over. Is one of the minor causes of electrical fire in LV installations at 230V.
Ric.