DAGS on GFCI tester?
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Christopher A. Young
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GFCIs are supposed to be tested periodically. I usually test them when I
will be depending on one for protection. The built-in test is the same
as your resistor test above - a resistor is connected from the
downstream hot to the upstream neutral (or vice-versa?). The test works
even when there is no ground at the GFCI.
This side the pond GFCIs operate at 5mA (4-6).
If I remember right, there are some ground fault detectors for equipment
that operate at 30mA.
Would think you would get a nasty shock at 25mA with no RCD trip.
I certainly don't want to chase you away, but a good usenet group for
the UK (which you may have discovered)is
It is astonishing how different the electrical is in the US and UK -
like ring circuits, and RCD mains.
I don't know if there is any way to trip a GFI socket, but perhaps
someone here can help with that. I now know many household sockets
can be wired in series to a GFI socket.
I jes recently tripped our kitchen GFI circuit, with an old waffle
iron, from a socket I had no idea was GFI protected. It took out half
the sockets in our modular home, including the bathroom and front
room. I thought it was a circuit breaker and went outside to reset
it, but found no circuit breakers tripped. I came back inside and
began checking other sockets with a 3 LED socket tester and that's how
I learned how extensive the blackout was. I finally checked another
kitchen socket, the one which had the GFI reset thingie, but not the
socket I was using when the GFI blew. I reset the GFI and all those
dead sockets were re-energized. Who knew!? Live and learn. ;)
Just push the test button on the GFCI outlet or
breaker. That's sufficient for me that it's working
and protecting the outlets downstream from the
GFCI. Or alternatively there are simple, cheap
LED outlet plug-in testers that show if the hot/nuetral are
reversed, no ground, etc. They typically have a test
button that you can press that will trip the GFCI if
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