Sure, like any other mechanical/electrical devices THEY CAN CRAP OUT. However, as a past electrical design engineer I believe their use can help save lives and property and am a fan of their use, albeit there can be a failure or nuisance factor one has to deal with now n then.
The GFCI would trip if there was in the vicinity of 5 milliamps of LEAKAGE current that was flowing elsewhere other then the normal Neutral conductor return path.
The standard Thermal Magnetic circuit breaker requires EITHER a sudden high current draw (like a short) or else a slower lingering high current (like say 20 amps) overload type of current draw
HOWEVER if theres an arcing current condition THAT MAY WELL NOTTTTTTTTT TRIP the standard Thermal/Magnetic breaker ORRRRRRRRR trip a GFCI AND A LOW CURRENT ARC CAN CAUSE EXTREME HEAT AND START A FIRE while a thermal magnetic or GFCI wont trip out
THEREFORE they can indeed help prevent fires and/or save lives as an arc is hotttttttt but may not trip a non AFCI breaker.
I say use them, the life they save may be yours or your family and to me thats worth an expense and/or an ocasional nuisance.
Thats my OPINION and all are welcome to their own if they want to use them or not
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Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
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