Wire nuts on the DC side have been verboten in Oregon for over a decade. IMO,
copper split bolts wrapped with insulating then regular tape are the way to go.
Back in the days of 12V system and no series fusing, we used to use them all
the time to combine PVs. I've gone into some of those systems
we will never use wire nuts I have seen to many issues we will use
insulated cable connector blocks or if there is room splicer blocks, I have
been updating inverters with no problems if its a larger inverter more then
2 strings we use 1000 volt PV wire and the combiner box. the new inverters
requi
Steve:
The PV is 200 feet away on the other side of a building. We have THWN in PVC
conduit. This job was installed over 10 years ago. We don't want to repull all
of the leads for 6 strings in PV wire.
We Void splices like the plague but the PV leads terminated in a HU361 switch
and we needed
SB4000US. The next job is now underway with 4000US and 5000US units.
William
Miller Solar
> On Jun 24, 2014, at 9:03 AM, Jerry Shafer wrote:
>
> Which inverters are you installing to replace the 2500U
> Jerry
>
>
>
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Which inverters are you installing to replace the 2500U
Jerry
On Mon, Jun 23, 2014 at 3:39 PM, William Miller
wrote:
> Friends:
>
> We are starting to replace dying SB2500s with new units. The AFCI is
> giving us fits with disturbances. We are told we can not even use wire nuts.
>
> Has anyone
Morning William,
You can contact me offline, or better yet, call our Service Line. I checked
and see no calls in about AFCI issues.
Also, we don't recommend wire nuts on DC conductors (or AC) due to the
probability of unreliable and highly resistive connection.
Thanks
SMA America, LLC
Steve
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