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Old wire?

2482 Views 22 Replies 18 Participants Last post by  RIVETER
Was at a doctors building removing the time clock for outside lighting and adding a photocell.

Was pulling wire through the conduits to get upto the main floor so I could take it outside.
After lines are pulled in I went downstairs to do final connections and close up all the junction boxes. After closer examination I discovered that some if the wires were cracking up exposing the conductors. I'm just glad I didn't get a short while pulling through the conduit with my fish tape.











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OK Dan we've all made mistakes, that adds to our experience. And experience helps us not make more mistakes.

So, what's your next move?

We all make mistakes - and I will only punish those who don't learn from their mistakes.

Ever do any post mortem / failure analysis? We use them to develop M&P's (method of procedure) to ensure we don't make the same mistake in the future.
 

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It seemed to just a bad roll? Maybe they left it out in the weather?
All the other conductors were good and pliable.

Would like to get a fiberglass fish tape.
you will find a lot of insulation like this if the conductors have exceeded temp or been exposed to too much sunlight over time.

i use a nylon tubing type fishtape with plastic tips (greenlee)
requires a bit of gentle handling but slides easily in conduit even with
previously installed conductors
 

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I have never seen wire inside a panel do that. I cannot thing of any reason that should happen except the possibility the wire is a counterfeit of some kind?
I have seen platic fail like that but out of the sun and insode a panel? never. it looks like defective wire insulation to me.
 
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