I've had several clients ask questions of me lately related to the
necesity of grounding their computers and peripherals.  I've found
myself at a loss when trying to explain.  I realize that's because I
don't fully understand the electronics of using an earth ground myself
beyond its function as a sort of "safety valve".
I'd be greatful if any of you double eeez or otherwise knowledgeable
'tron folks could explain this to me.

[1]Why is it important to have (earth) ground connected to one's
computer or any appliance, equipment, etc. that has three-pronged AC
plugs?
[2]Is it the case that earth ground plays an integral role in the
engineering and function of any surge suppressor, UPS, or line
conditioner?
[3]If someone is moving into a home whose outlets are not grounded (to
do so would be very costly as the concrete foundation is not raised),
how might they protect their sensitive electronic equipment like
computers and peripherals?
[4]In the case of number [3], is using GFI outlets their only option?
[5]Can one assume that, if an appliance, computer, etc. has a
three-pronged outlet that its circuitry is designed to exploit the
advantages of earth ground in the event of over-current or over-voltage?




TIA
Joan Rapier

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