ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Anybody comment on materials pricing?
by gfretwell - 06/10/21 01:33 PM
2 pole GFI feeding 1 and 2 pole loads
by gfretwell - 06/04/21 02:27 AM
Lock-down Thread
by HotLine1 - 06/01/21 08:15 AM
Updated Forum Software
by Admin - 05/31/21 12:09 AM
Square D "All-In-One" Panelboard
by HotLine1 - 05/29/21 12:13 PM
New in the Gallery:
2020 - 2021 Winter Project
2020 - 2021 Winter Project
by Bill Addiss, April 29
Garden 2021
Garden 2021
by Bill Addiss, April 26
Who's Online Now
0 members (), 39 guests, and 15 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#94198 07/17/05 01:56 AM
Joined: Nov 2002
Posts: 244
W
wewire2 Offline OP
Member
I'm looking for opinions to save me from codebook homework.
The scenario is an old house wired with Romex and metal boxes. The romex has a gound that is undersized (#16 awg). The existing receptacles are worn out non-grounded type. The grounding conductors are twisted together inside the box and wrapped around the clamp screw. The owner does not want to rewire. Can the existing undersized grounds be used to attach new U-ground receptacles legally? It seems like a safer installation in one respect with the grounding but maybe a fire hazard due to the undersize ground.
What about liability when you replace a ungrounded receptacle with a new ungrounded one? In the kitchen if replacing existing unground receptacles would it be mandatory (not just safer) to upgrade them to GFI?
Old houses are cans of worms. Where do you draw the line with meeting current codes when doing repairs?

2017 / 2014 NEC & Related Books and Study Guides
Joined: Apr 2002
Posts: 914
E
Member
As long as the existing wiring is in good condition there I'm aware of no code requiring you to bring it to current standards when replacing devices. The undersized ground, if in good condition, should be OK. Check the continuity ground to neutral to see if it's good. You mentioned the grounds where twisted, you should crimp these. You are allowed to put 3 prong receptacles on an ungrounded system if you put the circuit on a GFCI, so if you want to be safe, do this for extra protection.

When replacing the outlets in wet areas like kitchens and baths always replace with a GFCI.

Joined: Jun 2005
Posts: 91
G
Member
Not much homework to it. See 406.3 for details. [Linked Image]


-George
Joined: May 2002
Posts: 1,716
R
Member
I agree with Electric Eagle, that if the existing EGC, even being smaller than todays standard, is intact (verify continuity) it could be used.

George's reference is the correct article, but there is some opinion (mine included) that 406.3(D)(3) does not eliminate the requirements of 250.114.

Roger

[This message has been edited by Roger (edited 07-17-2005).]

Joined: Mar 2005
Posts: 236
Member
i wonder if the home owner has a computer
and other expensive electronic equipment that he would like to see knocked out by a spike or lighting strike. surge surpressors without a efficient ground are useless. perhaps instead of rewiring eveything a couple of new dedicated circuits would be worth the cost. in my humble opinion.

h20

Joined: Jun 2005
Posts: 12
D
Member
wewire2
Valid point on the where do you stop bringing up to code. Insuring that no one gets shock and no fires would be main concern. Some codes are for convenience only and just make life easier.
406.3 (D)(1)
If a grounding conductor EXISTS in the receptacle enclosure than a grounding type recept. SHALL be used.
I agree with everyone on checking continuity of EG and tap from existing grounds. Plus the code requires the use of them if they exist in the enclosure.
I would consider using some arc faults on the bedroom circuits and gfci in kitchen and baths.


Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
Posts: 165
Joined: March 2007
Top Posters(30 Days)
Admin 11
Trumpy 10
Popular Topics(Views)
280,304 Are you busy
213,394 Re: Forum
200,331 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5