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#23261 - 03/13/03 10:16 PM AFCI's again....Sorry  
CanadianSparky  Offline
Member
Joined: Mar 2001
Posts: 85
Alberta Canada
Sorry to beat this dead horse again guys, but, went to a presentation on AFCI's tonight put on by Cutler-Hammer(maybe Eaton-Yale elsewhere.) They had a piece of NMD 90 wired off a 15 Amp AFCI breaker to show how little of an arc was generated on a short circuit fault as comapared to a regular breaker. Being as inquisitive as we are we tried just touching the neutral and ground together to see what happened, the AFCI tripped every time. My question is why? Of course the guy they send out is a salesman and not a technician so we didnt get a very good answer from him, so I was just wondering what you guys thought.


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#23262 - 03/13/03 10:47 PM Re: AFCI's again....Sorry  
stamcon  Offline
Member
Joined: Mar 2001
Posts: 329
So San Francisco CA
The breaker is a combination AFCI/GFCI breaker. The GFCI portion opened the circuit when you went grounded conductor to ground.


#23263 - 03/13/03 11:12 PM Re: AFCI's again....Sorry  
WebSparky  Offline
Member
Joined: Feb 2003
Posts: 138
Cleveland, Ohio
Hummm.......

I think this may help.
I used to think since a gfci does not need a ground wire connected to it to function properly, that the above situation would not apply. Then I read this;
http://www.codecheck.com/gfci_principal.htm



[This message has been edited by WebSparky (edited 03-13-2003).]


Dave

#23264 - 03/13/03 11:34 PM Re: AFCI's again....Sorry  
caselec  Offline
Member
Joined: Apr 2002
Posts: 558
San Jose, CA
Most AFCI breakers do not provide GFCI protection but all AFCI's do have ground fault protection set around 30 - 50 ma. Cutler-Hammer does make a combination AFCI/GFCI. If the neutral comes into contact with equipment ground the GFP or GFCI will open.

Curt


Curt Swartz


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