[RE-wrenches] Concrete tight versus raintight

[August Goers]

Hi William,



About 5 years ago this became a big issue up in San Francisco and we had to
learn the hard way. We used to just go buy outdoor EMT fittings and we were
okay, then the inspectors started requiring fittings that say raintight or
wet location (often stamped “wetloc”) on them. I don’t know for certain,
but I believe it might have been a clarification added in the 2008 NEC at
the time. See “NEC 358.42 Couplings and Connectors. Couplings and
connectors used with EMT shall be made up tight. Where buried in masonry or
concrete, they shall be concretetight type. Where installed in wet
locations, they shall comply with 314.15.”



If you go over to NEC 314.15 they mention that fittings installed in wet
locations shall be listed for use in wet locations.



So, you just need to make sure that the fittings you get are listed for the
correct purpose. I have seen both concretetight and wetloc type. As someone
else mentioned, most of the wetloc fittings have a plastic sealing ring in
them and many or blue colored.



Best,



August

Luminalt



*From:* re-wrenches-bounces at lists.re-wrenches.org [mailto:
re-wrenches-bounces at lists.re-wrenches.org] *On Behalf Of *William Miller
*Sent:* Wednesday, January 15, 2014 10:32 PM
*To:* RE-wrenches
*Subject:* [RE-wrenches] Concrete tight versus raintight



Friends:



It appears I may have a whole in my education.  I thought all EMT
compression fittings were alike.  It appears that I have been using
“concrete tight” fittings where I should have been using “raintight”
fittings.  Did they use to be the same item?  I did a web search on the
differences and came up empty.  I want to be informed in this area and
appreciate any knowledge.



William Miller





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Lic 773985

millersolar.com <http://www.millersolar.com/>

805-438-5600
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