ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
UL 508A SPACING
by ale348 - 03/29/24 01:09 AM
Increasing demand factors in residential
by tortuga - 03/28/24 05:57 PM
Portable generator question
by Steve Miller - 03/19/24 08:50 PM
Do we need grounding?
by NORCAL - 03/19/24 05:11 PM
240V only in a home and NEC?
by dsk - 03/19/24 06:33 AM
New in the Gallery:
This is a new one
This is a new one
by timmp, September 24
Few pics I found
Few pics I found
by timmp, August 15
Who's Online Now
1 members (ale348), 302 guests, and 14 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#81074 07/09/02 08:02 PM
Joined: Jul 2002
Posts: 17
Q
qopanel Offline OP
Member
Does this article require that you MUST run a grounding conductor with the branch circuits? I failed an inspection today in a patient area of an dentist office, because I did not run a separate grounding conductor to the panel. I used a grounding pig tail from my hospital grade receptacles to the back of my metal 1900 box. All the branch circuits are installed in EMT. Is this type of installation suppossed to be redundant? I really dont have a big problem with having to pull a ground to the receptacles (i've got plenty of room) but, I would like to know for the future if I have made a mistake.

Thanks
Bob

Stay up to Code with the Latest NEC:


>> 2023 NEC & Related Reference & Exam Prep
2023 NEC & Related Reference & Study Guides

Pass Your Exam the FIRST TIME with the Latest NEC & Exam Prep

>> 2020 NEC & Related Reference & Study Guides
 

#81075 07/09/02 08:21 PM
Joined: Apr 2002
Posts: 558
C
Member
Hi Bob

Yes, you do need to install a separate insulated equipment ground wire. All receptacles and other electrical equipment in patient care areas require redundant grounding (metal raceway with insulated ground wire). Read 517.13(B)

Curt


Curt Swartz
#81076 07/09/02 08:41 PM
Joined: Oct 2001
Posts: 172
W
Member
Bob
Where it says shall comply with A and B the B section requires the insulated ground.

517.13 Grounding of Receptacles and Fixed Electric Equipment in Patient Care Areas.
Wiring in patient care areas shall comply with 517.13(A) and (B).
(A) Wiring Methods. All branch circuits serving patient care areas shall be provided with a ground path for fault current by installation in a metal raceway system, or a cable armor or sheath assembly. The metal raceway system, or cable armor, or sheath assembly, shall itself qualify as an equipment grounding return path in accordance with 250.118. Type AC, Type MC, Type MI cables shall have an outer metal armor or sheath that is identified as an acceptable grounding return path.
(B) Insulated Equipment Grounding Conductor. In an area used for patient care, the grounding terminals of all receptacles and all non–current-carrying conductive surfaces of fixed electric equipment likely to become energized that are subject to personal contact, operating at over 100 volts, shall be grounded by an insulated copper conductor. The grounding conductor shall be sized in accordance with Table 250.122 and installed in metal raceways or metal-clad cables with the branch-circuit conductors supplying these receptacles or fixed equipment.

#81077 07/13/02 01:25 PM
Joined: Feb 2002
Posts: 2,233
H
Member
Bob,

Watch out if the area is for pediatrics too. You might need tamper resistent receptacles or covers.

#81078 07/13/02 02:21 PM
Joined: May 2002
Posts: 1,716
R
Member
Remember, critical branches can not be installed in AC or MC. (2002 change)

Bob, being that this is a dental facility you probably did not have a critical branch.

In any case your EMT would cover this.

You would still need redundant grounding as the others stated. FYI, you did not need HG receptacles in this installation, unless the equipment itself had HG cord caps.

Roger

[This message has been edited by Roger (edited 07-13-2002).]


Link Copied to Clipboard
Powered by UBB.threads™ PHP Forum Software 7.7.5