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by Trumpy - 12/12/19 03:49 AM
FPE in Germany
by Trumpy - 12/12/19 03:29 AM
"Esoteric" countries and their wiring practices?
by Texas_Ranger - 12/02/19 10:52 AM
Look at this mess...
by NORCAL - 11/15/19 10:21 PM
New in the Gallery:
FPE in Germany pt.2
FPE Breaker panel in germany
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Re: Burnt Receptacle [Re: Lostazhell] #184515 02/12/09 03:15 AM
Joined: Mar 2008
Posts: 76
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packrat56 Offline
Member
What scares me is what you said about the panel crubling, now that's scary. I am interested in how it was the neutral that fried, you and Randy have got some good points though. I know a master electricain who is an electrical instructor at the community college that I am attending. He would sure be intrerested in this one, when I get a chance I will talk with him anout this, see what he says. I do agree with what Randy said though, a problem there is the only thing I can of that would make sense.


I have a sense of adventure, I just keep it leashed with common sense.
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Re: Burnt Receptacle [Re: packrat56] #184523 02/12/09 11:14 AM
Joined: Sep 2003
Posts: 119
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ComputerWizKid Offline
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Maybe the hot and Neutral were reversed?


Theres always enough room in the junction box.You just need a bigger hammer
Re: Burnt Receptacle [Re: ComputerWizKid] #184526 02/12/09 12:10 PM
Joined: Dec 2002
Posts: 307
S
sabrown Offline
Member
Though I can't tell the conductor type, I pulled a receptacle that looks very similar to this from my Grandmothers house. The culprit....aluminum wiring on a copper only rated receptacle. I kept the receptacle as a reminder and an object lesson for others. A loose copper conductor can have the same effect when under load.

Re: Burnt Receptacle [Re: sabrown] #184527 02/12/09 12:23 PM
Joined: Mar 2005
Posts: 399
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Alan Nadon Offline
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Grounded conductor. Theory verses reality. At the panel the grounded and grounding are equal potential. At the receptacle with no load they are equeal. When a load is applied between the hot and the grounded the grounded conductor becomes hot for half of each cycle.
When the refrigerator would run the grounded conductor would have a different potential from the grounded box. This would allow for an arc, from the grounded to the grounding.
This came up at a training session when an inspector (multi-hat) asked why he sometimes got zapped touching a white, i.e. grounded wire.


Alan--
If it was easy, anyone could do it.
Re: Burnt Receptacle [Re: Alan Nadon] #184529 02/12/09 12:56 PM
Joined: Mar 2008
Posts: 144
JoeKP Offline
Member
There is no ground wire... probably why it didn't trip at all


-Joe
“then we'll glue em' then screw em'”
-Tom Silva
TOH
Re: Burnt Receptacle [Re: JoeKP] #184532 02/12/09 01:29 PM
Joined: Apr 2002
Posts: 7,123
HotLine1 Offline
Member
I would venture an opinion like this.
Neutral connection at receptacle 'loose', and over time arcing from bad connection further deteriorated the condition. Heat transfer thru the recept transferred to the cord cap, causing further deterioration. Start-up cycles of the freezer added to the issue.

As to the cb not tripping...it's only monitoring the current on the 'hot' leg, and IMHO it's very doubtful that a fault to ground occurred in this situation.



John
Re: Burnt Receptacle [Re: HotLine1] #184571 02/13/09 12:54 PM
Joined: Mar 2008
Posts: 144
JoeKP Offline
Member
Originally Posted by HotLine1


As to the cb not tripping...it's only monitoring the current on the 'hot' leg, and IMHO it's very doubtful that a fault to ground occurred in this situation.



I agree, because there is no ground wire in the box


-Joe
“then we'll glue em' then screw em'”
-Tom Silva
TOH
Re: Burnt Receptacle [Re: Lostazhell] #190569 11/24/09 06:07 PM
Joined: Nov 2009
Posts: 10
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Luc Offline
Member
*is scared* Whoa! We have those recepts. at my work. And the place was built 50's or 60's so IDK about the wiring situation

Re: Burnt Receptacle [Re: Lostazhell] #197327 11/20/10 12:47 PM
Joined: Sep 2006
Posts: 154
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crselectric Offline
Member
the proximity of the wall paneling also covers the edge of the box, also the device screws go thru the paneling then I imagine into the 6-32 holes, yeah didnt look like there was a ground pigtail to box either. was this grounding type recept. grandfathered in as a replacement, due to not widely available non-gr. type?

Re: Burnt Receptacle [Re: Lostazhell] #197484 12/02/10 02:57 AM
Joined: Sep 2006
Posts: 154
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crselectric Offline
Member
interesting? it looks to me like the recept. might have been rev. polarity. unless the burnt wire is also discolored and not also black. I put up a similar gfci that the cust. said "and the breaker never tripped?" so if polarity was correct and the box wasnt grounded what would open the circuit, or vica versa, as here nothing opened?

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