ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals

Topic Options
Rate This Topic
#23261 - 03/13/03 06:16 PM AFCI's again....Sorry
CanadianSparky Offline
Member
Registered: 03/05/01
Posts: 85
Loc: 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.
Top
Work Gear for Electricians and the Trades
#23262 - 03/13/03 06:47 PM Re: AFCI's again....Sorry
stamcon Offline
Member
Registered: 03/24/01
Posts: 329
Loc: 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.
Top
#23263 - 03/13/03 07:12 PM Re: AFCI's again....Sorry
WebSparky Offline
Member
Registered: 02/21/03
Posts: 138
Loc: 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
Top
#23264 - 03/13/03 07:34 PM Re: AFCI's again....Sorry
caselec Offline
Member
Registered: 04/14/02
Posts: 558
Loc: 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
Top

Member Spotlight
Member Since: 12/24/00
Posts: 4259
New in the Gallery:
SE cable question
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box


Who's Online
1 registered (gfretwell), 54 Guests and 9 Spiders online.
Key: Admin, Global Mod, Mod
 
New in the Gallery:
SE cable question
 
Top Posters (30 Days)
Admin 47
HotLine1 43
gfretwell 19
Ruben Rocha 12
Trumpy 9
 
Newest Members
Freecrowder, clee512, Jdscott2005, FAIZAN, Regitest2

ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals