RV electrical
We just built a new house and I had a 20amp breaker put in. Went with a 20amp because the electrician said that should run 95% of RV's just fine, including AC... hindsight tells me I should have gone ...
Forum Discussion
myredracer wrote:Too bad the large percentage of "How GFCIs work" pages on the Internet leave out half of its functionally. The ground-neutral fault function has been discussed on this forum multiple times for several years now. Links?
Huh?
It does not inject a signal. Have you got a credible link to something that shows this?
Ground Fault Current Interrupters by Sam Goldwasser
LM1851 Datasheet (Pages 6 & 7 are a good place to start)
If you want proof, just connect the ground and neutral pins on a GFCI or downstream outlet together, and the GFCI will trip unless it's a really ancient one. You can do this on an installed device or on the workbench. It doesn't take a zero-ohm connection to do the trip. A lower resistance value that required for a hot-neutral trip to be sure, but nowhere near a dead short.
How a GFCI works: Nema organization
Need to read that document more carefully. It talks about grounded neutral detection at least a dozen times. The 120 Hz signal injection is how it's generally implemented.
