Posted by George Marsh on November 06, 2014 at 15:23:22 from (192.182.49.176):
For decades I've wondered why a GFCI will trip if you touch ground to neutral. Both ground and neutral are bonded together to the same point in the load center. GFCI trips when it detects a difference in current between power and neutral. Then today while talking to myself, because no one was around and I wanted to listen to someone talk, Self had an AHA moment. Even though there isn't anything plugged into the GFCI, the GFCI is using power. So, there is current in the neutral and power wire. Shorting the ground to neutral allows some of the neutral current to find it's way back on the ground wire.
To confirm all this I put a short 3 wire cord on a GFCI. Then plugged it into a device that measures watts. Sure enough, 2.6 watts. Not sure of the accuracy of my meter, so you may try the experiment and find something different.
Better not tell tree huggers that GFCIs are using that much power. A billion GFCI's will consume 2.6 billions watts. Is it possible that all this wasted power is causing GOBAL WARMING? George
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Today's Featured Article - The 8N and the Fox - by Zane Sherman. Dec. 13 1998, Renfroe, Alabama. Last niht I dreamed about the day that I plowed the field of about 10 acres over on what Jimmy and Dandy called the Ledbetter field. I was driving the 1948 8N Ford tractor that Jimmy bought in 48 new This was prebably in about 1951 and maybe even befor the house was built. This would have made me to be about16 years old and I drove the tractor for nothing and would have paid to drive it if I had had any money which I didn't, but neit
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