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    1) I've used the Euro connectors you show for decades with good
    results.  Not necessarily legal here, but I like them....<br>
    2) Before bad mouthing the wire nuts, I've found installer error to
    almost always be the problem.  In the installation pictured,  the
    wire nuts are not outdoor rated, and they have obviously not been
    twisted enough. None of the wires leading into the connector show
    any twist.  They need to be twisted until the wires wrap around
    themselves a couple of turns.<br>
    <br>
    I don't like wire nuts, but they are legal to use for DC, and only
    cause problems AC or DC when improperly installed.<br>
    I think the real reason we see so many failures on DC is they are
    outdoors (more corrosion, hotter) and they are higher continuous
    amperage than most AC circuits see.<br>
    <pre class="moz-signature" cols="72">R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer, 
Licensed Master Electrician
Solar Design Engineer
303 505-8760</pre>
    <div class="moz-cite-prefix">On 9/6/2016 1:39 PM, Chris Mason wrote:<br>
    </div>
    <blockquote
cite="mid:CAG6C1q=8hdBbDBKS4FY46hyX1G7W18151AuV7i18TVG4eY2=zg@mail.gmail.com"
      type="cite">
      <div dir="ltr">The problem is that wire nuts are not intrinsically
        sound, a good connection depends on the skill of the craftsman.
        They are not legal under the British electrical code, where I
        did my training, wires need to be firmly held under a screw as
        in a terminal. The US would be better to get rid of these nasty
        devices.
        <div>In Britain, you see these terminal strips used. As long as
          they stay dry, they last forever.</div>
        <div><a moz-do-not-send="true"
            href="http://my.rs-online.com/largeimages/R4649744-01.jpg">http://my.rs-online.com/largeimages/R4649744-01.jpg</a><br>
        </div>
      </div>
      <div class="gmail_extra"><br>
        <div class="gmail_quote">On Tue, Sep 6, 2016 at 3:19 PM,
          MDElectricSolar . <span dir="ltr"><<a
              moz-do-not-send="true"
              href="mailto:mdelectricsolar@gmail.com" target="_blank">mdelectricsolar@gmail.com</a>></span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0
            .8ex;border-left:1px #ccc solid;padding-left:1ex">
            <div dir="ltr">
              <div class="gmail_default" style="font-size:small">Yes,
                wire nuts, and loose connections are a big issue in AC
                circuits as well. One of my most frequent
                troubleshooting calls is tracing out loose/burnt/arcing
                connections behind receptacles and switches. Usually
                caused by sloppy workmanship, or contractors being in a
                hurry.</div>
              <div class="gmail_default" style="font-size:small">Mike</div>
            </div>
            <div class="gmail_extra"><br>
              <div class="gmail_quote">
                <div>
                  <div class="h5">On Tue, Sep 6, 2016 at 12:14 PM, Glenn
                    Burt <span dir="ltr"><<a moz-do-not-send="true"
                        href="mailto:glenn.burt@glbcc.com"
                        target="_blank">glenn.burt@glbcc.com</a>></span>
                    wrote:<br>
                  </div>
                </div>
                <blockquote class="gmail_quote" style="margin:0 0 0
                  .8ex;border-left:1px #ccc solid;padding-left:1ex">
                  <div>
                    <div class="h5">
                      <div>
                        <div>
                          <div
                            style="font-family:Calibri,sans-serif;font-size:11pt">Be
                            aware that SMA explicitly prohibits the use
                            of wire nuts in their installation
                            instructions on the DC input circuits.</div>
                        </div>
                        <div dir="ltr">
                          <hr><span
                            style="font-family:Calibri,sans-serif;font-size:11pt;font-weight:bold">From:
                          </span><span
                            style="font-family:Calibri,sans-serif;font-size:11pt"><a
                              moz-do-not-send="true"
                              href="mailto:jerrysgarage01@gmail.com"
                              target="_blank">Jerry Shafer</a></span><br>
                          <span
                            style="font-family:Calibri,sans-serif;font-size:11pt;font-weight:bold">Sent:
                          </span><span
                            style="font-family:Calibri,sans-serif;font-size:11pt">‎9/‎6/‎2016
                            14:32</span><br>
                          <span
                            style="font-family:Calibri,sans-serif;font-size:11pt;font-weight:bold">To:
                          </span><span
                            style="font-family:Calibri,sans-serif;font-size:11pt"><a
                              moz-do-not-send="true"
                              href="mailto:RE-wrenches@lists.re-wrenches.org"
                              target="_blank">RE-wrenches@lists.re-wrenches.<wbr>org</a></span><br>
                          <span
                            style="font-family:Calibri,sans-serif;font-size:11pt;font-weight:bold">Subject:
                          </span><span
                            style="font-family:Calibri,sans-serif;font-size:11pt">Re:
                            [RE-wrenches] Wire nuts</span><br>
                          <br>
                        </div>
                        <div>
                          <div>
                            <p dir="ltr">Wrenches<br>
                              Better pic</p>
                            <div class="gmail_extra"><br>
                              <div class="gmail_quote">On Sep 5, 2016
                                4:52 PM, "Jerry Shafer" <<a
                                  moz-do-not-send="true"
                                  href="mailto:jerrysgarage01@gmail.com"
                                  target="_blank">jerrysgarage01@gmail.com</a>>
                                wrote:<br type="attribution">
                                <blockquote class="gmail_quote"
                                  style="margin:0px 0px 0px
0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid">
                                  <p dir="ltr">To my fellow wrenches<br>
                                    It comes up every so often and with
                                    DC, I will not use, approve or pass
                                    any wire nuts on any DC side. Some
                                    say its OK but the facts are they
                                    will fail, this connection was just
                                    six years and when l opened the
                                    junction box it was glowing and by
                                    the looks of it has for some time.
                                    There are 8 strings 2 per string and
                                    thats a 12.5 % failure rate (the
                                    other one was completely distroyed)
                                    not to mention the fire hazard in a
                                    PVC junction box.<br>
                                    Please pass this along and tell
                                    everyone to stop using these. <br>
                                    Jerry</p>
                                </blockquote>
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          <div dir="ltr">Chris Mason
            <div>
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            <div>869.662.5670</div>
            <div>Skype: netconcepts</div>
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