Madison Electric has an actual rubber washer to seal fitting to box as lock ring is tightened.
They are however fussy with the internal rings. Erika Weliczko REpower Solutions cell: 216.402.4458 On Jan 16, 2014, at 2:54 PM, "William Miller" <[email protected]> wrote: > Friends: > > We used some Bridgeport fittings yesterday. My foreman reports the following: > > The new blue rain tite connectors have a prob. The connectors have a plastic > gasket/ring that seals between the connector body and the box. It is > impossible to tighten the con to box without destroying the ring or having a > slightly loose con/box connection. A loose connection means poor bonding. > > I would add that any looseness of these fittings can contribute to mechanical > failure of conduit runs. We rely on code compliant strapping *and* secure > tightening of fittings to keep a conduit assembly secure and in place for > years to come. It looks like we need to find a fitting with firmer washers. > The Arlington NMLT fittings have yellow washers that are pretty rigid. I > will rob one and try it on the Bridgeports. We bought a quantity of the EMT > fittings and I don’t want to have to replace them… > > William > > > > From: [email protected] > [mailto:[email protected]] On Behalf Of August Goers > Sent: Thursday, January 16, 2014 8:00 AM > To: RE-wrenches > Subject: Re: [RE-wrenches] Concrete tight versus raintight > > 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 > > > <image001.jpg> > Lic 773985 > millersolar.com > 805-438-5600 > > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2013.0.3462 / Virus Database: 3681/7008 - Release Date: 01/16/14 > _______________________________________________ > List sponsored by Home Power magazine > > List Address: [email protected] > > Change email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org >
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