Need Help Understanding GFCI & AFCI - Electrical - DIY Chatroom Home Improvement Forum


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 10-30-2010, 08:24 AM   #1
Member
 
Join Date: May 2010
Posts: 158
Rewards Points: 150
Default

Need help understanding GFCI & AFCI


I learned a little about GFCI & AFCI yesterday at the Home Depot. The electrical guy explained it like this:

GFCI protects humans against being shocked.
GFCI are required in any room with water or a bare concrete floor (local code)
GFCI can be a breaker or receptacle. If installed as receptacles -- one GFCI receptacle at the beginning of the circuit will protect non-GFCI receptacles further down the circuit.

AFCI protects houses against fire
AFCI are required in bedrooms, dining rooms, living rooms, ect where there is no water
AFCI are breakers and protect the entire circuit

I may be misstating what he said but that is how I remembered it.

He said something else that confused me - AFCI breakers cannot be used on the same circuit as GFCI receptacles. Then he said that maybe you could but it might not pass code.

Why can't GFCI receptacles be used on AFCI protected circuits?

Why would this be against code?

Advertisement

sheslostcontrol is offline   Reply With Quote
Old 10-30-2010, 08:39 AM   #2
Master Electrician
 
Join Date: Mar 2010
Location: Indiana
Posts: 2,977
Rewards Points: 2,210
Default

Need help understanding GFCI & AFCI


GFCI receps will work fine on AFCI protected circuits.

Advertisement

brric is offline   Reply With Quote
Old 10-30-2010, 09:11 AM   #3
Member
 
Join Date: May 2010
Posts: 158
Rewards Points: 150
Default

Need help understanding GFCI & AFCI


Is there a reason a circuit with AFCI & GFCI would not meet code and fail inspection?
sheslostcontrol is offline   Reply With Quote
Old 10-30-2010, 09:39 AM   #4
Licensed electrician
 
Join Date: Sep 2007
Location: Maryland
Posts: 8,017
Rewards Points: 2,832
Default

Need help understanding GFCI & AFCI


Going above what the code requires is fine.
__________________
Answers based on the National Electrical Code. Local amendments may apply. Check with your local building officials.
Jim Port is online now   Reply With Quote
Old 10-30-2010, 10:08 AM   #5
Graduate of Wiring 1-2-3
 
Join Date: Sep 2010
Location: New Hampshire
Posts: 31
Rewards Points: 25
Default

Need help understanding GFCI & AFCI


You need both if there is an aquarium in the bedroom.
Lurlene is offline   Reply With Quote
Old 10-30-2010, 10:22 AM   #6
Master Electrician
 
Join Date: Mar 2010
Location: Indiana
Posts: 2,977
Rewards Points: 2,210
Default

Need help understanding GFCI & AFCI


Quote:
Originally Posted by Lurlene View Post
You need both if there is an aquarium in the bedroom.
Where could I find this in the NEC?
brric is offline   Reply With Quote
Old 10-31-2010, 01:24 AM   #7
Graduate of Wiring 1-2-3
 
Join Date: Sep 2010
Location: New Hampshire
Posts: 31
Rewards Points: 25
Default

Need help understanding GFCI & AFCI


My preference, maybe not NEC's. I've got both in my bedroom, no problem so far.
Lurlene is offline   Reply With Quote
Old 10-31-2010, 07:15 AM   #8
Licensed Electrical Cont.
 
Speedy Petey's Avatar
 
Join Date: Feb 2004
Location: NY State
Posts: 6,899
Rewards Points: 2,152
Default

Need help understanding GFCI & AFCI


Quote:
Originally Posted by Lurlene View Post
My preference, maybe not NEC's.
You didn't say that. You said "You need...". This implies it is mandatory, which it is not.

This is why non-professionals should refrain from giving advice on boards like this.
Speedy Petey is offline   Reply With Quote
Old 10-31-2010, 08:10 AM   #9
Just call me Andrew
 
Join Date: Mar 2009
Location: Albany, NY
Posts: 2,258
Rewards Points: 1,012
Default

Need help understanding GFCI & AFCI


I wonder if anyone will manufacture AFCI/GFCI combination (not a combination-type AFCI) breaker. I mean one that truly does the job of both a standard GFCI breaker and an combination-type AFCI.

I wonder if it would be too big to fit in a standard panel?
__________________
Andrew

secutanudu is offline   Reply With Quote
Old 10-31-2010, 09:28 AM   #10
Licensed Electrical Cont.
 
Speedy Petey's Avatar
 
Join Date: Feb 2004
Location: NY State
Posts: 6,899
Rewards Points: 2,152
Default

Need help understanding GFCI & AFCI


I am waiting for padded walls and floors to become mandatory in a home. Oh, and no sharp edges or corners either.

I really do feel that electricity is just too unsafe to have in a home. There ought to be a law against it.
Speedy Petey is offline   Reply With Quote
The Following 2 Users Say Thank You to Speedy Petey For This Useful Post:
jlhaslip (10-31-2010), secutanudu (10-31-2010)
Old 10-31-2010, 06:43 PM   #11
Graduate of Wiring 1-2-3
 
Join Date: Sep 2010
Location: New Hampshire
Posts: 31
Rewards Points: 25
Default

Need help understanding GFCI & AFCI


Quote:
Originally Posted by Speedy Petey View Post
You didn't say that. You said "You need...". This implies it is mandatory, which it is not.

This is why non-professionals should refrain from giving advice on boards like this.
You're right, Pete. I'll stick to asking embarrassing questions and telling amusing stories till I'm a professional.
Lurlene is offline   Reply With Quote
Old 10-31-2010, 07:18 PM   #12
" Euro " electrician
 
frenchelectrican's Avatar
 
Join Date: Apr 2006
Location: WI & France { in France for now }
Posts: 5,369
Rewards Points: 2,000
Default

Need help understanding GFCI & AFCI


Quote:
Originally Posted by secutanudu View Post
I wonder if anyone will manufacture AFCI/GFCI combination (not a combination-type AFCI) breaker. I mean one that truly does the job of both a standard GFCI breaker and an combination-type AFCI.

I wonder if it would be too big to fit in a standard panel?
I just want to clearify the poster comment about the combation AFCI/GFCI and yes there are few manufacter do make the combo verison I know SqD, ClutterHammer , GE , Seimens and few others do make them and the combo vierson is avibale but the cost will varies a little depending on what brand and which place will stock it.

Merci.
Marc
frenchelectrican is offline   Reply With Quote
Old 10-31-2010, 07:32 PM   #13
Master Electrician
 
Join Date: Mar 2010
Location: Indiana
Posts: 2,977
Rewards Points: 2,210
Default

Need help understanding GFCI & AFCI


The 'combination' feature of arc fault circuit breakers pertains to the fact that they detect both series and parallel arc faults. It has nothing to do with the inherent (50mA or so) ground fault detection of arc fault circuit breakers.
brric is offline   Reply With Quote
Old 10-31-2010, 07:35 PM   #14
" Euro " electrician
 
frenchelectrican's Avatar
 
Join Date: Apr 2006
Location: WI & France { in France for now }
Posts: 5,369
Rewards Points: 2,000
Default

Need help understanding GFCI & AFCI


Quote:
Originally Posted by brric View Post
The 'combination' feature of arc fault circuit breakers pertains to the fact that they detect both series and parallel arc faults. It has nothing to do with the inherent (50mA or so) ground fault detection of arc fault circuit breakers.
Maybe so but with new combo AFCI/GFCI it will protect personals I will find a link with this set up.

Merci.
Marc
frenchelectrican is offline   Reply With Quote
Old 11-01-2010, 12:59 PM   #15
Member
 
Join Date: Jan 2009
Location: WV
Posts: 3,016
Rewards Points: 2,212
Default

Need help understanding GFCI & AFCI


The Home Depot guy's explanation of the two breaker types is pretty much correct. Not so much his code knowledge. I've never heard of using a GFCI on an AFCI circuit (or vice versa) but I don't think it's prohibited.

Were you asking about this for a specific reason? Code requirements vary widely by location. For example, where I live the applicable code is still NEC 2005. In the log house I built I only had to have AFCIs for the bedroom circuits.

Advertisement

md2lgyk is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
GFCI, AFCI, and SABC a7ecorsair Electrical 5 08-20-2010 11:57 PM
Afci & gfci secutanudu Electrical 11 10-13-2009 08:00 AM
code question - AFCI / GFCI breakers Red Squirrel Electrical 15 09-17-2009 12:16 PM
A few questions regarding GFCI AND AFCI protection CowboyAndy Electrical 5 03-10-2008 04:20 PM




Top of Page | View New Posts