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#121456 - 07/17/05 07:54 PM Is That Receptacle Hot?  
electure  Offline


Member
Joined: Dec 2000
Posts: 4,262
Fullerton, CA USA
Quote
Is it OK to place receptacles over baseboard heaters?


renosteinke


[Linked Image]


Tools for Electricians:

#121457 - 07/19/05 04:38 AM Re: Is That Receptacle Hot?  
Trumpy  Offline


Member
Joined: Jul 2002
Posts: 8,223
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?. [Linked Image]


#121458 - 07/19/05 05:12 AM Re: Is That Receptacle Hot?  
Big Jim  Offline
Member
Joined: Jul 2003
Posts: 394
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.


#121459 - 07/19/05 06:46 AM Re: Is That Receptacle Hot?  
LearJet9  Offline
Member
Joined: Apr 2005
Posts: 197
Millis, MA USA
Looks like this installation is 20 years old. No such rule/regulation existed back then.


#121460 - 07/19/05 07:39 AM Re: Is That Receptacle Hot?  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
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......) [Linked Image]


#121461 - 07/19/05 05:16 PM Re: Is That Receptacle Hot?  
Wireless  Offline
Member
Joined: Jun 2005
Posts: 73
Los Angeles CA USA
When do you have the heat and A/C running the same time?


#121462 - 07/19/05 08:18 PM Re: Is That Receptacle Hot?  
renosteinke  Offline
Cat Servant
Member
Joined: Jan 2005
Posts: 5,316
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.


#121463 - 07/19/05 08:33 PM Re: Is That Receptacle Hot?  
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
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.

[Linked Image]

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

#121464 - 07/23/05 02:33 PM Re: Is That Receptacle Hot?  
Theelectrikid  Offline
Member
Joined: Apr 2004
Posts: 810
Levittown, PA
Saw one of those on eBay recently.


Is there anyone on board who knows how to fly a plane?

#121465 - 01/13/06 10:28 PM Re: Is That Receptacle Hot?  
Theelectrikid  Offline
Member
Joined: Apr 2004
Posts: 810
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?

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