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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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