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 <[email protected]> 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.
Cheers, Sam ![OnSite Energy]() | Sam Haraldson Operations Specialist (406) 551-6135 1515 N. Rouse Ave Bozeman, MT 59715 Locally owned and operated since 2012 | ![B Corporation]() |
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