Speaking of combination types though...
In 2008, we will be required to use the combination type. It appears also that we will probably have to protect all 120 volt circuits in the house. Considering the fact that most manufacturer's can't get their combiantion type to pass the tests, and considering the fact they are supposed to trip on series arcs, does anyone else see a potential for disaster? I mean, what happens if the code requires them throughout the house, and they end up nuisance tripping because of series arcs? The branch/feeder type that we use today don't respond to series arcs because (alledgedly) you can't differentiate between a series arc and the closing of a light switch, or the unplugging of a device while under load. Can you imagine the black eye that the combiantion type would give the industry if they are required throughout, and they consistantly nuisance trip?
