[RE-wrenches] Pass through/transition box for Enphase

Carl Adams swingjunkie at gmail.com
Wed Aug 10 14:37:45 PDT 2016


I second Mike Nelson's approach, simple, easily inspectable, rugged.

Carl Adams
SunRock Solar
NABCEP Certified PV Installer

On Aug 10, 2016 12:20 PM, "Mike Nelson" <mdelectricsolar at gmail.com> wrote:

> I have been using buchannon copper crimps with their plastic snap on "wire
> nuts" for years to splice rooftop wires (enphase or pv wire to string
> inverter) inside junction boxes or soladecks. Best connection you can have
> and I've never had one come loose or melt down.
>
> Michael D Nelson
> MD Electric & Solar, Inc.
> 707-684-0064 mobile
> 707-884-1862 office
> www.mdelectricsolar.com
> Sent from my iPhone
>
> On Aug 9, 2016, at 11:03 PM, Ray Walters <ray at solarray.com> wrote:
>
> I think the issue has always been locating the right parts, not the
> installation.  Everyone carries the Cobra X flex, but not the ferrules. We
> usually crimp lugs on and use breakers with stud terminals, so the need for
> ferrules is minimal.
>  I have always wondered about the terminal bussbars from Outback and
> Midnite though.  They're ILSCO and I can't find any mention about extra
> flex, which usually means they are not rated for anything beyond Class B
> stranding.
>
> R.Ray Walters
> CTO, Solarray, Inc
> Nabcep Certified PV Installer,
> Licensed Master Electrician
> Solar Design Engineer303 505-8760
>
> On 8/8/2016 9:54 PM, Jay wrote:
>
> Thimbles are easy to install and make fine strand wire OK for use in
> standard connections.
>
> Jay
> Peltz power.
>
> On Aug 8, 2016, at 5:39 PM, Glenn Burt <glenn.burt at glbcc.com> wrote:
>
> Be aware that depending upon the vintage of the Engage cable, up to
> recently the conductors used in their cables are fine stranded and cannot
> be used in the terminal blocks provided with the Soladeck.
> This has been acknowledged by Enphase with a revision to their Engage
> manufacturing spec, and by Soladeck to me in writing. One fix is to confirm
> the date of manufacturer of the Engage cable ( much of the fine strand
> version remains in distribution). Another is to source appropriate ferrules
> to be crimped onto the fine stranded conductors before using them in the
> standard Soladeck terminals.
>
> Also beware of the same issue if you are splicing with these older Engage
> cables. Most screw terminals like Polaris are also not listed for use with
> fine stranded conductors. NSI has a special Polaris terminal that is grey
> that is listed for use with fine stranding, and can safely be used.
> I saw a few incorrect Polaris blocks pulled from an installation recently
> that had melted...
> ------------------------------
> From: Michael Morningstar <mjmorningstar at gmail.com>
> Sent: ‎8/‎8/‎2016 15:23
> To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
> Subject: Re: [RE-wrenches] Pass through/transition box for Enphase
>
> I use DIN rail mount "feed through" terminal blocks. There's all kinds and
> you will find some constructed such that no live parts exposed.
> Michael
>
> On Aug 8, 2016, at 8:49 AM, Jason Szumlanski <jason@
> floridasolardesigngroup.com> wrote:
>
> I'm looking to bring 8 Enphase 240V circuits in multiple conduits into an
> enclosure inside the attic where I can transition to Romex. I'd rather use
> some kind of rail mounted terminals in an enclosure or something rather
> than making splices in a generic j-box. I'm not looking to combine circuits
> - just transition from THWN to Romex and keep things neat an organized.
>
> Any suggestions?
>
> Jason Szumlanski
>
>
>
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