On 6/5/2015 2:16 PM, Michael Hennebry wrote:
On Fri, 5 Jun 2015, g wrote:
On 06/05/2015 03:43 PM, John R Pierce wrote:
On 6/5/2015 1:33 PM, Michael Hennebry wrote:
It's a desktop in an old house.
The outlets have ground-fault protection,
but the third prong is ungrounded.
not sure how GFI would function at all without a valid ground, unless
the GFI is wired to neutral, which is dangerous on its own.
As I understand it, GFI sums the currents going into each prong.
If the sum is not close enough to zero, it breaks the circuit.
I thought it monitored the current on the ground pin, and if there is
ANY significant ground current, it disconnects the line and neutral
pins, shutting the socket off..
--
john r pierce, recycling bits in santa cruz
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