An isolation transformer doesn't change anything. We are talking interconnected systems. Any grid-tied power source cannot be an SDS. It can be connected to an SDS, but it cannot by itself be an SDS.
If any load can draw its power from both the service and the PV system concurrently, the PV system cannot be SDS.On a strict reading of code definitions, I agree with shortcircuit.
Not entirely...However, I believe that with respect to system grounding, the point is moot. 690.47 supersedes 250.
A very good practical rule, even if it may be hard to derive that from the definitions.If any load can draw its power from both the service and the PV system concurrently, the PV system cannot be SDS....
A very good practical rule, even if it may be hard to derive that from the definitions.
If any load can draw its power from both the service and the PV system concurrently, the PV system cannot be SDS.
Not entirely...
But what's relevant for line-side connections is whether you want to call the transition disconnect a service disconnect or a PV system disconnect. There are differences in grounding requirements.
If you apply the requirements of 690.47 that supersede Article 250, you cannot call it a service disconnect... JMO
Anything on the PV side of the PV system [AC] disconnect is part of the PV system... :roll:How about the DC PV conductors? What system do they belong to, and do they have direct connection to the rest of the premises wiring?
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