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#193159 - 03/20/10 01:39 PM Old subject question  
George Little  Offline
Joined: Jan 2004
Posts: 1,489
Michigan USA
I know this is an old subject but I wonder if anyone has information on the installation of a receptacle with ground terminal up. I am not aware of anything in the NEC but there seems to be a policy of installing "ground prong up" in hospitals. Is there something in the hospital code that specifies this requirement?

George Little

2017 / 2014 NEC & Related Books and Study Guides

#193163 - 03/20/10 03:54 PM Re: Old subject question [Re: George Little]  
HotLine1  Offline

Joined: Apr 2002
Posts: 6,878
Brick, NJ USA

The logic is if a metal cover were to come into contact with a non-fully inserted plug, with ground 'up' there is no 'big flash'!

As to a code requirement, research will be required.


#193165 - 03/20/10 04:08 PM Re: Old subject question [Re: HotLine1]  
George Little  Offline
Joined: Jan 2004
Posts: 1,489
Michigan USA
John, I am familiar with that logic but can't really support it even slightly. I've been an electrician all my adult life and I'm 70 years old and I've never heard of that happening. Too far fetched for me. I just thought there would be some architect or engineer monitoring this board and they might have some NFPA or other standard that is used at the design phase of their specs.

George Little

#193166 - 03/20/10 04:53 PM Re: Old subject question [Re: George Little]  
EV607797  Offline
Joined: Oct 2006
Posts: 745
Fredericksburg, VA, USA
Well, while we are at it: What about horizontal mounting requirements in the Chicago area? I still haven't found a legitimate reason for that.


"But the guy at Home Depot said it would work."

#193169 - 03/20/10 07:35 PM Re: Old subject question [Re: EV607797]  
George Little  Offline
Joined: Jan 2004
Posts: 1,489
Michigan USA
At least with the horizontal mount and the grounded conductor blade up, you would not have a "big flash" like you still could if the ground blade were up. It's believable that the plate could still come in contact with the ground blade and the ungrounded blade with the ground blade in the up position. Assuming that the logic for mounting the receptacle in the ground up position to avoid the "big flash".
Come on hospital people what's the reason for mounting the receptacle in the "ground up" position.

Hey Fretwell- let's hear from ya.

Last edited by George Little; 03/20/10 07:36 PM.

George Little

#193172 - 03/20/10 08:46 PM Re: Old subject question [Re: George Little]  
Joined: Mar 2004
Posts: 251
Kingwood, TX USA
Although I know of no NEMA standards or requirements, it seams most commercial equipment like soda machines, ice makers and large coffee pots that have a right angle plug have a ground pin up configuration. Most home equipment like refrig. and window AC have Ground pin down. I have some hospital grade IEC cords with a right angle plug and they are ground pin up.

#193177 - 03/20/10 08:53 PM Re: Old subject question [Re: WESTUPLACE]  
Rewire  Offline
Joined: Feb 2008
Posts: 165
It was in the specs to put the ground up in the last hospital addition we did

#193193 - 03/20/10 10:01 PM Re: Old subject question [Re: Rewire]  
gfretwell  Offline

Joined: Jul 2004
Posts: 9,141
We just killed a thread for the same question didn't we? wink

but I am officially in the "it makes no difference category".
Typically I see people turning the switched receptacles upside down from the others as an aid to identifying them later.
The only time it does seem to matter is when you have a right angle molded plug. I have examples of cords that come out each way though and my UPS cords seem to come out at 45 degrees (so you can get 2 in a duplex I suppose.)

Greg Fretwell

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