3tigerz

This connection (in pics) is located in a electrical sub base below PTAC unit (a/c,heat combo) through the wall. This is the third unit failure and is very concerning. The wiring practice of the previous employee worries us. The cord from the a/c unit has a very thick insulation and when attached with a wire nut it did not seem to be a proper fit causing, what I believe, to be arcing in the wire nut until it fails. Does this theory seem valid? These connections are about 4 to 5 years old (if that info helps).
My background: I was an industrial electrician for over 6 years, yes I served my apprenticeship, but do to the economy I moved out of the service area and took a job in charge of maint. in a high end senior building. Any thoughts on the faults?
Thanks.

http://s578.photobucket.com/albums/s...albumview=grid

3tigerz

sorry posted in wrong cat.

JohnJ0906

No connector or strain relief on that cord?

Just wire it up and shove it into the unit?

Yes, you should be concerned, and worried. Was this employee an electrician?



I wonder why the PTACs didn't come with a factory connected cord.

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John from Baltimore
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All responses based on the '08 NEC
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Speedy Petey

Duplicate.

Go here: high resistance?