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liquidtight #99512
05/27/06 12:59 AM
05/27/06 12:59 AM
V
victor  Offline OP
Junior Member
Joined: May 2006
Posts: 3
Las Vegas
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

2017 / 2014 NEC & Related Books and Study Guides
Re: liquidtight #99513
05/27/06 07:41 AM
05/27/06 07:41 AM
I
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
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
Re: liquidtight #99514
05/27/06 03:03 PM
05/27/06 03:03 PM
renosteinke  Offline
Cat Servant
Member
Joined: Jan 2005
Posts: 5,316
Blue Collar Country
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.

Re: liquidtight #99515
05/30/06 10:40 PM
05/30/06 10:40 PM
V
victor  Offline OP
Junior Member
Joined: May 2006
Posts: 3
Las Vegas
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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