ryan_618
Senior Member
- Location
- Salt Lake City, Utah
I thought I knew pretty well how a GFCI worked...until last night.
Me and an instructor that I have known for a long while were doing a joint class last night and tonight, and he did an expirement. He took a hot and nuetral and inserted them into either end of a hot dog, to help simulate an electrical shock, and to demnostrate current flow. Oddly enough, it tripped when it was GFCI protected. Now, there were only two wires connected to the load, and there was not a parrellel path for neutral current to travel. I know that GFCI's measure current leaving against current returning via a CT, and if there is a difference of 4-6 mA it will open. According to Mr. Kirchoff, current leaving the power supply must be equal to current returning to the power supply.
Where did this leakage current come from and where is it going???
Me and an instructor that I have known for a long while were doing a joint class last night and tonight, and he did an expirement. He took a hot and nuetral and inserted them into either end of a hot dog, to help simulate an electrical shock, and to demnostrate current flow. Oddly enough, it tripped when it was GFCI protected. Now, there were only two wires connected to the load, and there was not a parrellel path for neutral current to travel. I know that GFCI's measure current leaving against current returning via a CT, and if there is a difference of 4-6 mA it will open. According to Mr. Kirchoff, current leaving the power supply must be equal to current returning to the power supply.
Where did this leakage current come from and where is it going???