Just reading more slowly, each inverter has to be on its on separate
disconnect means. You cannot put multiple inverters on the same
disconnecting means unless there are individual disconnecting means
upstream.
On 2/25/2019 10:53 AM, William Miller wrote:
Friends:
I have an NEC code question on an upcoming project. It is a home that
has an existing 8 kW ground-mounted grid-tied system. The owner wants
to add another 10 kW of grid-tied PV. My question is about 705.12,
point of connection. Specifically section (D)(1). That section states:
/The source interconnection of one or more inverters installed in one
system shall be made at a dedicated circuit breaker or fusible
disconnecting means./
So if there are going to be two inverters on premise, do the outputs
have to be aggregated to connect via one circuit breaker? This might
be difficult to do as the exiting inverter is connected via a
different sub-panel than the one that is planned to receive the new
inverter output.
This article
<https://iaeimagazine.org/magazine/2014/01/16/load-side-pv-connections/>
addresses the question.
I would be very grateful if any of you can share any experience you
might have in interpreting this section of the code.
Thanks in advance.
William
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