IAEI 2008 NEC Analysis of Changes

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tom baker

tom baker

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The latest IAEI journal has the first of several articles on analysis of 2008 NEC changes. They have a head start over Mike Holt as there are IAEI members on each CMP. The changes they are covering seem like a done deal.
AFCI's for an entire dwelling unit? And of course these are the combination type.
Are the combination type available yet?
 
George,
A combination type AFCI is one that provides protection beyond the outlet. The ones currently on the market are branch circuit and feeder type AFCIs and provide very limited protection beyond the outlet. There are no combination type AFCIs on the market at this time. The use of this type of AFCI will be required starting 1/1/06, but I have my doubts if they will be on the market at that time.
Don
 
I don't want to know about them or how they work. all I care about is if it is in the NEC and says "intall here", than that is what I am concerened about "Install it here" I let smarter perpole than me decide how and if they work.
 
afci/gfci ... whats the difference ...

afci/gfci ... whats the difference ...

ok maybe I'm a bit dense today but after reading the site about the afci's I don't see the difference between them and a gfci ... some one please explain how they are different ... they both "Sense" a leakage in the circuit ... what am I missing here ... m
 
Mario,
ok maybe I'm a bit dense today but after reading the site about the afci's I don't see the difference between them and a gfci ... some one please explain how they are different ... they both "Sense" a leakage in the circuit
Click to expand...
The GFP part of the AFCI does function like GFCI, except that the trip point is different with the GFCI tripping with ~5mA of leakage current and the AFCI tripping with 30 to 50 mA of leakage current. The GFCI is a single function device and that all it does. The AFCI has additional electronics that looks at the "arc signature" of a parallel arcing fault and acts to open the circuit.
Don
 
I have a question regarding combo afci/gfci circuits that puzzles me.A gfci will trip if there is a neutral to ground fault with no load and an afci will trip with a neutral to ground fault with a load but not with out.So a combo would trip regardless of a load or not am I correct ??? If so troubleshooting a problem would be alot more difficult.
 
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