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Joined: Oct 2000
Posts: 2,749
[Linked Image]

OR was it because the rigid metal conduit was threaded into the T Conduit Body made of aluminum?

This was part of a lighting system on a floating dock where boats can be boarded for an ocean cruise, or taxi to the airport.

Joe Tedesco, NEC Consultant
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Joined: Jul 2003
Posts: 394
Judging from the condition of the GRC, I vote for massive corrosion.

Joined: Aug 2002
Posts: 1,081
Is any of this listed for use in a corrosive environment, such as near salt water?

Is there such a special listing requirement?

[This message has been edited by ThinkGood (edited 10-21-2003).]

Joined: Apr 2002
Posts: 7,323
Likes: 7
I'll have to cast a vote that the conduit was "pulled" out of the (probably) aluminum condulet. You said "floating dock"......someone possibly forgot to take that into consideration when they made-up the pipe. Movement, or possibly "contraction" due to the length of the run and the temp when it was installed can factor in also.


Joined: Apr 2002
Posts: 7,323
Likes: 7
Think Good:
Yes, there is PVC coated RGC for corrosive areas. It's a BEAR to work with!!

Sch 80 PVC, if otherwise suitable for the location is the preferred. That is, after checking the spec, plans, and assuring that it's otherwise approved for the intended install. And, you can't forget the expansion joints.


Joined: Jan 2004
Posts: 91
two dissimilar metals causes galvanic action. is the use of penetrox (or its equivalent) be used and comply with code. as to the installation the lazy electrician probably crossthreaded the pipe and after one thread caught left it that way. I agree that plastibond or ocal should have been used and the condulets cost a fortune.

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