Bill,

Great point on the line charge Capacitance!!
A great example of when circuit charging becomes a nuisance would be a few extension cords connected together with normal NEMA 5-15 R/P connections, several power tools which use series wound commutator motors with open brushes, and a little bit of rain. This is normally followed by the quick removal of the GFCI breaker, swapped with a standard type frame [Linked Image] [Linked Image]

Another one would be with a whole gang load of cords running everywhere and each being a very long distance [upto 50 feet each], from there many power tools are connected to each cord. Some start and run together, some don't - most have dirty commutators, so the brushes spark like fireworks.
This stuff will trip even the most highest rated GFCI device!!
Long circuits, spark shows on brushes, cords running long distances on concrete/against bonded steel/etc.. many non-coincidental starts/runs on many circuits causes the circuit's charging Capacitance to be really high!

Just FYI. I'll return to my room now [Linked Image]

Scott SET

Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!