Home AC outlet (melted)

Reply

  #1  
Old 01-31-19, 01:32 PM
Member
Thread Starter
Join Date: Jan 2019
Posts: 4
Received 0 Votes on 0 Posts
Home AC outlet (melted)

Weird thing happening. I melted the inside of my wall outlet. I replaced all the 2 prong outlets with grounded outlets. There isnít a dedicated ground wire, but I discovered that the mounting boxes are grounded. A couple months after having secuessfully swapped the outlets, one of them melted. I think itís the outlet that is at the start of a circuit. With the outlet removed, breaker on, and all wires splayed out, upstream hot to downstream hot or neutral both read at about 98V... what is happening here?

 
Sponsored Links
  #2  
Old 01-31-19, 03:04 PM
ray2047's Avatar
Group Moderator
Join Date: Mar 2006
Location: USA
Posts: 33,597
Received 13 Votes on 11 Posts
Did you connect to the screws or back stabs? What is voltage hot to ground?
 
  #3  
Old 01-31-19, 09:25 PM
Member
Thread Starter
Join Date: Jan 2019
Posts: 4
Received 0 Votes on 0 Posts
I connected to the screws. Hot to ground is 120V
 
  #4  
Old 01-31-19, 09:53 PM
ray2047's Avatar
Group Moderator
Join Date: Mar 2006
Location: USA
Posts: 33,597
Received 13 Votes on 11 Posts
You have a loose neutral connection somewhere.
 
  #5  
Old 02-01-19, 09:11 AM
Member
Thread Starter
Join Date: Jan 2019
Posts: 4
Received 0 Votes on 0 Posts
Ah Okay. Is this typically an issue at neutral wire connections to receptacles downstream from the issue and not at the breaker panel? Probably user error if so. Downstream appliances have been behaving properly with no other melting. For a while I had the up and downstream hots and neutrals connected respectively in the problem area without a receptacle in line with downstream outlets passing voltage tests.




https://i.postimg.cc/tCmgsnmb/image.jpg
https://i.postimg.cc/T1zHs93G/image.jpg
Melted hot side and charring in the ground slot.
 
  #6  
Old 02-01-19, 11:57 AM
Forum Topic Moderator
Join Date: Sep 2005
Location: USA
Posts: 4,642
Received 19 Votes on 18 Posts
Where the melting occurred, I would say it was a loose connection between the wire and the screw. Maybe it just wasn't seated quite right when the screw was tightened or the screw wasn't tightened enough.

If it was an issue with the internals or an appliance plugged in, it would have melted more from the inside.

Loose connections cause heat, and heat causes the melting.

Assuming it's all copper wiring, right?
 
  #7  
Old 02-01-19, 02:33 PM
Member
Thread Starter
Join Date: Jan 2019
Posts: 4
Received 0 Votes on 0 Posts
I didnít have anything plugged into that outlet when it was giving me problems. There is a pass through and the opposite side of the wall has the whole entertainment system on it- no problems there.

Yes I believe itís copper wiring and itís old. Some of the jacket is dry rotting away. I think loose connection makes sense- but if you see above, I was getting some weird readings with no receptacle in line. I guess I can check the neutrals on the rest of the circuit as best I can and throw a new receptacle in there- will report back.
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes
 
Ask a Question
Question Title:
Description:
Your question will be posted in: