Electrical problem might have ended badly

   / Electrical problem might have ended badly #11  
A breaker should have tripped or fuse blown before "wires suppling power to the next receptacle were burnt completely off". I'd strongly suggest your neighbor have his electrical system inspected by an electrician. It sounds like a higher capacity breaker or fuse has been installed on that line. No circuit containing outlets should have a breaker greater than 20 amps. Someone may have had a 30 or higher breaker in a drawer and put it in, trying to save the cost of buying a proper replacement. I don't think he's out of the woods yet.


PineRidge said:
The neighbor down the road called me this past Tuesday and asked if I might help him with an electrical problem that he was having.

Seems over the summer months he had used an older dehumidifier in the basement to keep things dry. The latter part of the summer the dehumidifier quit working as did half of the receptacles in the basement area.

Since I'm aware that most receptacles are connected daisy chain style the last receptacle in the basement that was still working would most likely be the place to start troubleshooting.

I removed the Bakelite cover plate after killing the power to find a melted area on a foam draft gasket about the size of a quarter. The wood paneling was also charred in an area about the size of a dime and the wires suppling power to the next receptacle were burnt completely off the receptacle. The receptacle itself fell apart in my hands as I was removing it from the single gang box. :eek:

Most likely this damage was a result of a loose connection and aggravated by the amp draw of the old dehumidifier. My recommendation was that the dehumidifier no longer be used, that he count his blessings, and that he say a prayer that evening thanking the man above that the home and possibly his life were spared from a fire.

I thought this might be a good story to share since it ended well. Most of the time we only hear about the unfortunate accidents that happen from day to day.
 
   / Electrical problem might have ended badly
  • Thread Starter
#12  
Mike it's #14 wire w/a 15 amp breaker at the panel. All the receptacles are also rated at 15 amps as well.

Don't think a breaker will trip unless an over-current condition exists. Loose connections can cause enough heat to start a fire without an over-current situation to the best of my knowledge.
 
   / Electrical problem might have ended badly #13  
PineRidge said:
Mike it's #14 wire w/a 15 amp breaker at the panel. All the receptacles are also rated at 15 amps as well.

Don't think a breaker will trip unless an over-current condition exists. Loose connections can cause enough heat to start a fire without an over-current situation to the best of my knowledge.
Absolutely. Think of the elements in a old style electric heater or a toaster oven. They glow red hot and don't draw more than 15 amps. Touch paper to one of those elements, and it will ignite.
 
   / Electrical problem might have ended badly #14  
SnowRidge said:
Absolutely. Think of the elements in a old style electric heater or a toaster oven. They glow red hot and don't draw more than 15 amps. Touch paper to one of those elements, and it will ignite.

Very good example. Thanks.
 
   / Electrical problem might have ended badly #15  
Would one of the newer Arc-Detection breakers have detected this?
 
   / Electrical problem might have ended badly
  • Thread Starter
#16  
Chris I would think that a good question for the inspector. Is he still actively posting?
 
   / Electrical problem might have ended badly #17  
PineRidge said:
Mike it's #14 wire w/a 15 amp breaker at the panel. All the receptacles are also rated at 15 amps as well.

Don't think a breaker will trip unless an over-current condition exists. Loose connections can cause enough heat to start a fire without an over-current situation to the best of my knowledge.

That's true. Perhaps the outlet was defective or installed incorrectly. Now I'd be worried about the condition of all the outlets in the house. Or at least the ones installed by the person that installed that one. Or the breaker could be defective.
 
   / Electrical problem might have ended badly #18  
I know the one on my porch appeared to have just a bit of the wire under the screw terminal... it was hanging on by just a thread of what was left of the solid wire. I wondered if it was not completely under the screw or the screw was not tight enough.
 
   / Electrical problem might have ended badly
  • Thread Starter
#19  
Moss in my case the solid wire was still wrapped completely around the screw on all the connection points.
 
   / Electrical problem might have ended badly #20  
PineRidge said:
Moss in my case the solid wire was still wrapped completely around the screw on all the connection points.
It doesn't have to be the terminals. It can be the where one of the plug blades and the receptacle contacts meet. If they do not make good electrical contact because of corrosion or other factors and a high current is drawn, it can go up in smoke.

I have personally experienced four of these failures and only one was due to a loose terminal.
 

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