You might have noticed a small sticker on some electrical equipment that
is labelled Hi-POT. What this means is that the power supply has been
tested with a high voltage static discharge. To pass the Hi-POT test
requires that the power supply doesn't pass the static charge on to the
device(s) it's powering, as this could potentially cause damage. This is
especially important when it comes to computer components, which are very
sensitive to electrostatic discharges.
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