GFCI And Grounded Conductors - 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 04-17-2011, 10:58 AM   #1
Member
 
Join Date: Mar 2011
Posts: 53
Rewards Points: 75
Default

GFCI and grounded conductors


Sorry this is pretty complicated. The point of my question is what to do with the grounded conductors.
I want to run 12/2 to a J box behind a sill, a switch loop to a switch/receptacle (because my wife doesn’t want to lose the receptacle I was going to take for a switch) using 12/3 and then pipe through the sill and to a wall mounted box outside which has a gfci receptacle. Then pipe runs up to a light device.
I was going to splice the hot from the home run to THWN going through the pipe to the line side of the gfci. From the load side I was going to run power back to the J box, splice with the switch loop and then to THWN back outside going to the light, keeping everything ground fault protected. Does this switch/receptacle grounded conductor need to be spliced after the load side of the gfci or can I splice it in the J box before it goes out to the gfci?

Thank you,
Ed

Advertisement

whatrymes is offline   Reply With Quote
Old 04-17-2011, 11:07 AM   #2
Master Electrician
 
Join Date: Mar 2010
Location: Indiana
Posts: 2,975
Rewards Points: 2,206
Default

GFCI and grounded conductors


In short, everything that is to be GFCI protected must come off of the load side of the GFCI. Grounded and ungrounded conductors.

Advertisement

brric is offline   Reply With Quote
Old 04-17-2011, 12:59 PM   #3
Member
 
Join Date: Nov 2007
Location: Nashua, NH, USA
Posts: 6,976
Rewards Points: 2,048
Default

GFCI and grounded conductors


You need four wires (not counting grounding conductor) from the J box through the pipe to the outside.
1. (Unprotected) neutral (grounded conductor)
2. Raw hot going out
3. GFCI Protected unswitched hot coming back
4. GFCI protected switched hot from switch loop

You need four wires from the J box over to the indoor switch/receptacle.
5. Unprotected neutral directly from J-box
6. Raw hot for receptacle only, from J-box
7. GFCI protected unswitched hot for switch only, from the outside via J-box
8. (GFCI protected) switched hot back to the outside via J-box

You really don't want the inside receptacle to be protected by an outdoor GFCI. If the GFCI tripped, you would have to go outside to reset it. If you insist you can do it this way:

Five wires from the J box through the pipe to the outside.
1. (Unprotected) neutral
2. Raw hot going out
3. GFCI Protected unswitched hot coming back
4. GFCI protected switched hot from switch loop
9. GFCI protected neutral coming back for switch loop

And three wires from the J box over to the indoor switch/receptacle.
5a. GFCI protected neutral from outside via J-box
7. GFCI protected unswitched hot
8. (GFCI protected) switched hot
__________________
Forget super sized fries. The Washington Redskins could promote healthy eating with First Lady Obama by choosing a (red skinned) turnip for a mascot.

Last edited by AllanJ; 04-17-2011 at 01:16 PM.
AllanJ is offline   Reply With Quote
Old 04-17-2011, 03:33 PM   #4
Member
 
Join Date: Mar 2011
Posts: 53
Rewards Points: 75
Default

GFCI and grounded conductors


Thank you AlanJ, I wasn't sure I even explained myself clearly.
whatrymes is offline   Reply With Quote
Old 04-17-2011, 10:04 PM   #5
Electrical Contractor
 
jbfan's Avatar
 
Join Date: Jun 2004
Location: Newnan GA
Posts: 5,957
Rewards Points: 2,310
Default

GFCI and grounded conductors


The light does not need ground fault protection.
__________________
Yes I am a Pirate, 200 years too late. "Jimmy Buffett"
jbfan is online now   Reply With Quote
Old 04-18-2011, 10:05 AM   #6
Licensed Pro
 
Join Date: Mar 2007
Location: SC
Posts: 1,545
Rewards Points: 1,000
Default

GFCI and grounded conductors


Couldn't you achieve the same thing with less wiring by using a combination switch/GFCI receptacle or a switch and GFCI in a 2-gang box?
__________________
"Life is hard. Life is harder when you're stupid." John Wayne
HouseHelper is offline   Reply With Quote
Old 04-18-2011, 10:50 AM   #7
Member
 
Join Date: Nov 2007
Location: Nashua, NH, USA
Posts: 6,976
Rewards Points: 2,048
Default

GFCI and grounded conductors


For unprotected outside light:

Three wires from the J box through the pipe to the outside.
1. (Unprotected) neutral for GFCI and light
2. Raw hot going out for GFCI only
4a. Unprotected switched hot from switch loop

Three wires from the J box over to the indoor switch/receptacle.
5. Unprotected neutral from J-box
6. Raw hot for receptacle (or second GFCI) and switch
8a. Unprotected switched hot for outside light
__________________
Forget super sized fries. The Washington Redskins could promote healthy eating with First Lady Obama by choosing a (red skinned) turnip for a mascot.

Last edited by AllanJ; 04-18-2011 at 10:53 AM.
AllanJ is offline   Reply With Quote
Old 04-18-2011, 09:58 PM   #8
Member
 
Join Date: Mar 2011
Posts: 53
Rewards Points: 75
Default

GFCI and grounded conductors


The point of this circuit is a receptacle, that is gfci protected, between 6 and 20 feet from an above ground pool. It is local code. I figured while I was running an underground circuit to a shed which is 15 feet from the pool, I would also add a motion detection light, and an override switch, to the back of our house. I also figured why not keep everything on the load side of the gfci but I'll think about that some more.

Thank you everyone

Advertisement

whatrymes 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
Problem with GFCI Outlets in Kitchen mkrawitz Electrical 13 04-14-2010 09:35 PM
Ungrounded GFCI + Surge Protector squigish Electrical 4 08-16-2009 05:45 PM
home grounding problem smoke-wagon Electrical 7 06-25-2009 04:07 PM
GFCI plugs in kitchen DeterminedMom Electrical 10 04-23-2009 11:42 PM
GFCI feeing subpanel question scott2332 Electrical 45 02-28-2009 04:15 PM




Top of Page | View New Posts