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Old 10-31-2007, 10:15 AM   #16
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I agree with Nate, just by loosening the clamp eliminates the short, but you still have bad insulation. Either replace the cable or if you left enough slack in the run, you may be able to feed more cable into the box and cut out the bad spot. Take your time removing the outer sheath of the 3-wire, it is easy to nick the actual wire insulation with your knife. Also agree with Andy, you are not a dumbass, wire it with confidence, check with your continuity tester, then power it up.


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Old 10-31-2007, 10:40 AM   #17
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Thanks guys - yes I left about an extra foot of slack so I can just cut off the bad part and re-clamp carefully. Am quite surprised the clamp caused that damage - I inspected the cable closely and there is no visible damage - I guess the crushing of the clamp causes tiny damage that creates the short. Yikes.
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Old 10-31-2007, 11:28 AM   #18
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Originally Posted by HouseHelper View Post
Check the cable clamp at JB 1. It is very easy to overtighten **/3 cable and cause a short. Also, it is better to check wiring using an ohmmeter instead of an extension cord. A lot less fireworks and much safer.
You're welcome.

I like to use the plastic snap-in NM clamps on **/3 cable just for this reason.
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Old 11-05-2007, 06:41 AM   #19
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Wanted to give you an update here and ask one more dumb question...

I replaced the Romex with 10 gauge THHN over the weekend. First let me say how enjoyable the job is when you use the right materials and techniques. Last week I ripped my hands apart trying to get Romex thru the conduit. Yesterday I used lubricant on the 4 THHN wires and they glide thru the conduit with ease. Things I wish I had known sooner : )

I tested at each critical point using the ohmmeter - all is OK. So all that is left now is the connection at the service panel which I need to find some daylight time for this week as my space is dark when all the power is shut off.

My question - I got a 30A double pole breaker for the circuit.... both the top and bottom half of the breaker handle are labeled 30A. Is this the right breaker for a 30A 120/240 dryer circuit or do I need to get one with 15A on each pole for a total of 30A? Again advice welcome.
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Old 11-05-2007, 06:45 AM   #20
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You have the right breaker.


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