The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Page 1 of 2 1 2 >
Topic Options
Rate This Topic
#121456 - 07/17/05 05:54 PM Is That Receptacle Hot?
electure Offline


Member
Registered: 12/24/00
Posts: 4229
Loc: Fullerton, CA USA
Quote:
Is it OK to place receptacles over baseboard heaters?


renosteinke


Top
Tools for Electricians:
#121457 - 07/19/05 02:38 AM Re: Is That Receptacle Hot?
Trumpy Offline


Member
Registered: 07/05/02
Posts: 8560
Loc: SI,New Zealand
Good question John,
The question I'd be asking is,can a cord running over the top of a heater like that, handle the vertical heat coming off of a heater?.
What would the temperature be?.
_________________________
Let's face it, these days if you're not young, you're old - Red Green grin
Top
#121458 - 07/19/05 03:12 AM Re: Is That Receptacle Hot?
Big Jim Offline
Member
Registered: 07/18/03
Posts: 377
Loc: Denver, CO USA
One of those outlets looks to be a 240 volt one, likely for the "window" A/C unit in the picture. That should make nice fireworks when the cord melts.
Top
#121459 - 07/19/05 04:46 AM Re: Is That Receptacle Hot?
LearJet9 Offline
Member
Registered: 04/24/05
Posts: 196
Loc: Millis, MA USA
Looks like this installation is 20 years old. No such rule/regulation existed back then.
Top
#121460 - 07/19/05 05:39 AM Re: Is That Receptacle Hot?
pauluk Offline
Member
Registered: 08/11/01
Posts: 7693
Loc: Norfolk, England
I wouldn't have thought having that A/C unit right above the heater was a good idea either, if only because it will restrict the convection from the latter.

On a serious note though, why are the grounds down on the left-hand receptacle and up on the 120 and 240V right-hand ones?

(Ducks and runs for cover......)
Top
#121461 - 07/19/05 03:16 PM Re: Is That Receptacle Hot?
Wireless Offline
Member
Registered: 06/09/05
Posts: 73
Loc: Los Angeles CA USA
When do you have the heat and A/C running the same time?
Top
#121462 - 07/19/05 06:18 PM Re: Is That Receptacle Hot?
renosteinke Offline
Cat Servant
Member
Registered: 01/22/05
Posts: 5305
Loc: Blue Collar Country
OK, guys, time for me to tell "the reat of the story."

This pic is from a hotel near the "downtown" of Reno. It will soon be demolished to make room for a new bus station.

The rule "no receptacles over heaters" is alluded to in 210.52. As this hotel is well over thirty years old, it is very possible that the code did not address the issue. As Trumpy suggested, there is a concern that the heat coming out of the unit might damage cords.

One of the receptacles- the one nearest the air conditioner- is a 'normal' convenience receptacle. The receptacle to the right, however, is another story.

THAT receptacle will look funny to those with good eyes. That is because this receptacle has a standard 120 pattern on the botton, and a 220 v. pattern above.
This receptacle is on the same circuit as the heater. The 220 part is to plug in the air conditioner.
The only problem with this set-up is that the 220 circuit comes from a different panel, and has no neutral. The 120 part, where active (not every room is) is powered from one leg of the heater circuit, and uses the conduit as a "neutral."
In many cases, this is accomplished by using a piece of wire to connect the ground screw on the device to the neutral screw. The return current than flows through the ground strap, mounting screws, and into the metal box. Since the device strap almos never sits snug against the box, the screws get hot enough to scorch/char the cover plate.
Top
#121463 - 07/19/05 06:33 PM Re: Is That Receptacle Hot?
iwire Offline
Moderator
Registered: 01/05/03
Posts: 4343
Loc: North Attleboro, MA USA
Quote:
THAT receptacle will look funny to those with good eyes. That is because this receptacle has a standard 120 pattern on the botton, and a 220 v. pattern above.


Those combo receptacles are still available.



But I would not suggest using it like this.

Quote:
The 120 part, where active (not every room is) is powered from one leg of the heater circuit, and uses the conduit as a "neutral."
_________________________
Bob Badger
Construction & Maintenance Electrician
Massachusetts
Top
#121464 - 07/23/05 12:33 PM Re: Is That Receptacle Hot?
Theelectrikid Offline
Member
Registered: 04/30/04
Posts: 854
Loc: Levittown, PA
Saw one of those on eBay recently.
_________________________
Is there anyone on board who knows how to fly a plane?
Top
#121465 - 01/13/06 07:28 PM Re: Is That Receptacle Hot?
Theelectrikid Offline
Member
Registered: 04/30/04
Posts: 854
Loc: Levittown, PA
Also if my eyes are good, all of those receptacles seem w little scorched.


Ian A.
_________________________
Is there anyone on board who knows how to fly a plane?
Top
Page 1 of 2 1 2 >

Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box

Recent Posts
Looking for older post
by sparkyinak
Today at 12:27 AM
License exam
by TRUE POWER
Yesterday at 11:33 PM
Members: Non-Members: Did you know?
by Admin
Yesterday at 02:34 PM
Safety at heights?
by HotLine1
01/21/17 08:51 PM
International Wire Colour Codes
by Texas_Ranger
01/21/17 03:29 PM

ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals