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:* [email protected] [mailto: [email protected]] *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 [image: Gradient Cap] Lic 773985 millersolar.com <http://www.millersolar.com/> 805-438-5600
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