DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Electrical and Wiring > Grounding Switches




Help Support House Repair Talk by donating using the link above.
Reply
 
Thread Tools Search this Thread
Old 04-17-2017, 05:32 PM  
Snoonyb
Senior Member
Join Date: Sep 2006
Posts: 2,402
Liked 420 Times on 372 Posts
Likes Given: 1

Default

Quote:
Originally Posted by slownsteady View Post
q1: so 22 years ago, you installed plastic boxes?
q2: is there a bare ground wire in the wire runs (white, black, bare or green)?
See post #4.


__________________
Illigitimas non-carborundum
Snoonyb is offline  
 
Reply With Quote
Old 04-18-2017, 04:44 AM  
bud16415
Fixer Upper
HRT_ADMIN.png
 
bud16415's Avatar
Join Date: Feb 2013
Location: Erie Pa, Pa
Posts: 4,317
Liked 1434 Times on 1098 Posts
Likes Given: 774

Default

The only metal you come in contact with given a plastic cover plate is the heads of the screws that hold the cover on. They are threaded into the steel frame of the switch. In the unlikely event the power shorted to the frame a safety ground wire connected to the switch would make a path to ground and trip the breaker. If a metal box was used and it was grounded there would be no need for the ground wire as the metal frame is attached to the box.

If it were mine and I had the safety ground in the cable I would attach it. If I was replacing the switch and it was old work and no ground was there I wouldn’t give it a second thought and just hook it up like the old one.


bud16415 is offline  
 
Reply With Quote
Old 04-18-2017, 08:10 AM  
nealtw
Contractor retired
 
nealtw's Avatar
Join Date: Nov 2010
Location: Upper Fraser Valley, British Columbia
Posts: 23,349
Liked 2915 Times on 2556 Posts
Likes Given: 4800

Default

Quote:
Originally Posted by bud16415 View Post
The only metal you come in contact with given a plastic cover plate is the heads of the screws that hold the cover on. They are threaded into the steel frame of the switch. In the unlikely event the power shorted to the frame a safety ground wire connected to the switch would make a path to ground and trip the breaker. If a metal box was used and it was grounded there would be no need for the ground wire as the metal frame is attached to the box.

If it were mine and I had the safety ground in the cable I would attach it. If I was replacing the switch and it was old work and no ground was there I wouldnít give it a second thought and just hook it up like the old one.
Have another look at plastic boxes.
https://www.google.com/patents/US3119895
nealtw is offline  
 
Reply With Quote
Old 04-18-2017, 08:25 AM  
bud16415
Fixer Upper
HRT_ADMIN.png
 
bud16415's Avatar
Join Date: Feb 2013
Location: Erie Pa, Pa
Posts: 4,317
Liked 1434 Times on 1098 Posts
Likes Given: 774

Default

Quote:
Originally Posted by nealtw View Post
Have another look at plastic boxes.
https://www.google.com/patents/US3119895
Itís great someone patented one in 1968 but all the ones I have bought are all plastic expect for the two nails you use to attach them to a stud. When I go to the apron and vest stores they have barrels of the all plastic blue ones.

Seems simpler to just ground the outlet or the switch and my guess is thatís why they added the ground screw to the switches.
bud16415 is offline  
slownsteady Likes This 
Reply With Quote
Old 04-18-2017, 08:27 AM  
Snoonyb
Senior Member
Join Date: Sep 2006
Posts: 2,402
Liked 420 Times on 372 Posts
Likes Given: 1

Default

Quote:
Originally Posted by nealtw View Post
Have another look at plastic boxes.
https://www.google.com/patents/US3119895
Or these most commonly used today;http://www.homedepot.com/s/electrical+box?NCNI-5
__________________
Illigitimas non-carborundum
Snoonyb is offline  
 
Reply With Quote
Old 04-18-2017, 08:31 AM  
nealtw
Contractor retired
 
nealtw's Avatar
Join Date: Nov 2010
Location: Upper Fraser Valley, British Columbia
Posts: 23,349
Liked 2915 Times on 2556 Posts
Likes Given: 4800

Default

Quote:
Originally Posted by Snoonyb View Post
Or these most commonly used today;http://www.homedepot.com/s/electrical+box?NCNI-5
There you go, I have not seen a plastic box with out ground strap, but it looks like they are not in that picture.
nealtw is offline  
 
Reply With Quote
Old 04-18-2017, 08:33 AM  
Snoonyb
Senior Member
Join Date: Sep 2006
Posts: 2,402
Liked 420 Times on 372 Posts
Likes Given: 1

Default

Quote:
Originally Posted by bud16415 View Post
Itís great someone patented one in 1968 but all the ones I have bought are all plastic expect for the two nails you use to attach them to a stud. When I go to the apron and vest stores they have barrels of the all plastic blue ones.

Seems simpler to just ground the outlet or the switch and my guess is thatís why they added the ground screw to the switches.
And there are a number of unknowns like, what is the dwellings age and in the boxes that do not appear to have a ground conductor, could it be in a romex that didn't have a grnd conductor or in the evolution of romex when an 18ga. bare copper was included and as often as not, simply cut off close to the strip.
__________________
Illigitimas non-carborundum
Snoonyb is offline  
 
Reply With Quote
Old 04-18-2017, 08:34 AM  
Snoonyb
Senior Member
Join Date: Sep 2006
Posts: 2,402
Liked 420 Times on 372 Posts
Likes Given: 1

Default

Quote:
Originally Posted by nealtw View Post
There you go, I have not seen a plastic box with out ground strap, but it looks like they are not in that picture.
Every home desperado, low brow and ace have them.
__________________
Illigitimas non-carborundum
Snoonyb is offline  
 
Reply With Quote
Old 04-18-2017, 08:53 AM  
nealtw
Contractor retired
 
nealtw's Avatar
Join Date: Nov 2010
Location: Upper Fraser Valley, British Columbia
Posts: 23,349
Liked 2915 Times on 2556 Posts
Likes Given: 4800

Default

Quote:
Originally Posted by Snoonyb View Post
Every home desperado, low brow and ace have them.
Up here they have a strap like this one
https://www.homedepot.ca/en/home/p.o...000404475.html
nealtw is offline  
 
Reply With Quote
Old 04-18-2017, 09:12 AM  
Snoonyb
Senior Member
Join Date: Sep 2006
Posts: 2,402
Liked 420 Times on 372 Posts
Likes Given: 1

Default

I now understand your point of reference.

Mite be a long drive, from PA.


__________________
Illigitimas non-carborundum
Snoonyb is offline  
 
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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


Similar Threads
Thread Thread Starter DIY Home Repair Forum Replies Last Post
motion switches and removal of 4-way switches nadjacs Electrical and Wiring 5 08-27-2013 08:26 PM
grounding trigg Electrical and Wiring 4 12-02-2012 06:32 PM
Grounding the House bigdave101 Electrical and Wiring 3 02-04-2011 03:37 AM
grounding breaker panel fuzzman Electrical and Wiring 6 06-26-2010 07:10 PM
Grounding Garage Imacarguytoo Electrical and Wiring 2 10-20-2008 07:38 PM



Newest Threads