[RE-wrenches] Buchanan Crimp in 1000v Applications and the NEC

[Dave Tedeyan]

Hi Adam,
This response is just to you. Is NYSERDA the inspection agency you are
talking about? Cause they have given me issues about using Wago Nuts inside
a 3R box, even after I got a statement from Wago saying that it is okay to
put it inside a 3R box. But squirting a bit of No-Ox in there seems to make
them happy about it. The one time we put one inside a 3R panel board to
extend a short wire and forgot to put No-Ox on that one, they gave us a 2
out of 5 on the inspection, even though that was the only thing noted in
the entire inspection report! But I would be curious if the point you make
above will work with NYSERDA?

Cheers,
Dave

On Tue, Nov 11, 2025 at 4:16 PM AE Solar via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> We had an inspection agency that was giving us a hard time about using
> buchanan crimps in junction boxes because they aren't rated for
> outdoor/damp locations. The point was made (on this listserve) that "*if
> the inside of a 3R enclosure isn't considered dry enough for a buchanan
> crimp/cap, then there's millions of 3R panels with breakers and busbars in
> them that would have the same problem*". The inspection agency finally
> relented. We put a little No-Alox in the cap. I know that's not what your
> initial post was about, but tossing that in for consideration just in
> case...
>
> Adam Katzman (he/him)
> Autonomous Energies | Owner/Operator
> www.AutonomousEnergies.com <http://www.autonomousenergies.com>
> (518) 567-1468
>
>
>
>
> On Tue, Nov 11, 2025 at 3:51 PM Jay via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
>> Hi Sam
>>
>> I can’t imagine being just copper it would matter, the AHJ might have a
>> different opinion however
>>
>> Question.
>> How are you insulating them?
>>
>> Jay
>>
>>
>> On Nov 11, 2025, at 11:15 AM, Sam Haraldson via RE-wrenches <
>> re-wrenches at lists.re-wrenches.org> wrote:
>>
>> 
>> Wrenches,
>>
>> On the attached product spec sheet for Ideal Copper Crimps (aka Buchanan
>> crimps) you'll see that max voltage for the crimp is rated at 600V but an
>> asterisk indicates up to 1000V when "in fixtures and signs".  In our
>> application this is a 1000v system and we are joining pairs of #10 PV
>> wires.  The junctions are made in a rail-mounted, plastic j-box.  We could
>> not find the definition of "fixture" as it might pertain to this situation
>> in the NEC and as such are interested to learn more about using Buchanan
>> crimps for 1000V applications.
>>
>> <image.png>
>>
>>
>> Cheers,
>> Sam
>>
>> [image: OnSite Energy] <https://onsiteenergyinc.com/>
>>
>> Sam Haraldson
>> Operations Specialist
>> (406) 551-6135
>> 1515 N. Rouse Ave Bozeman, MT 59715
>> Locally owned and operated since 2012
>> [image: B Corporation] <https://onsiteenergyinc.com/bcorp>
>> <IDEALIndustries-Crimp Connectors.pdf>
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