5 Jun
2015
5 Jun
'15
9:25 p.m.
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