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What failed first?

Learn the NEC with Mike Holt now!

Which failed first?

  • Connection internal to molded cord cap?

    Votes: 1 10.0%

  • Mating Surface(s) in receptacle?

    Votes: 8 80.0%

  • Your guess is as good as mine.

    Votes: 1 10.0%
  • Total voters
    10
  • Poll closed .
augie47

augie47

Moderator
Staff member
Location
Tennessee
Occupation
State Electrical Inspector (Retired)
The conductor does not seem to show near the damage as the cord cap so not likely a loose terminal. Poor mating surfaces is far too common a problem on these.
 
LarryFine

LarryFine

Master Electrician Electric Contractor Richmond VA
Location
Henrico County, VA
Occupation
Electrical Contractor
I voted for #2. The contact points look just like a breaker/stab overheating situation.

I believe that normal heat weakened the receptacle contact, which snowballed into arcing.

Better receptacles are more difficult to insert plugs into.
 
infinity

infinity

Moderator
Staff member
Location
New Jersey
Occupation
Journeyman Electrician
The gap on that burnt contact terminal seems to be as tight as the one on the other side. Given the fact that there is green corrosion on the EGC and the screws my guess is that the burnt terminal had corrosion between it and the cord cap.
 
rambojoe

rambojoe

Senior Member
Location
phoenix az
Occupation
Wireman
Pink and black...
It definately GLOW ARCED.
just kidding...
Blade contact primero...
The black insul. shrunk so much it looks like a 12awg.
 
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