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#99512 05/27/06 12:59 AM
Joined: May 2006
Posts: 3
V
victor Offline OP
Junior Member
Hi I would like to know where in the NEC talks about using liquidtight conduit to connect a dry type transformer because fo vibration. Thank you

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#99513 05/27/06 07:41 AM
Joined: Jan 2003
Posts: 4,391
I
Moderator
Welcome to the forum victor.

You will not find anything in the NEC requiring liquidtight conduit to be used to connect a dry type transformer because of vibration.

It is just a design choice buy the installer.


Bob Badger
Construction & Maintenance Electrician
Massachusetts
#99514 05/27/06 03:03 PM
Joined: Jan 2005
Posts: 5,445
Likes: 2
Cat Servant
Member
I'll go a bit farther...

True, the NEC does not address the matter. However, NECA standards document the use of flex at transformers as "trade practice", or good workmanship.

That aside, I noticed recently that some transformers have internal rubber mounts, so the piping actually does not connect to the part that vibrates.

I still like to see flex at the case, though. Old habits die hard.

#99515 05/30/06 10:40 PM
Joined: May 2006
Posts: 3
V
victor Offline OP
Junior Member
hi thank you for your reply, where can I get a copy of NECA stating the use of liquid flex as a good workmanship. Thank you


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