Hi,
I've seen as common practice when backfeeding a PV breaker in a service panel, when an outside utility disconnect is also required, installing a Type "T" conduit body and sending Line 1 and Line 2 out to the disco as a switch loop.
Seems like this violates 300.3? There really shouldn't be inductive heating, as inverter outputs are balanced and there is no current on the grounded conductor anyhow. Also, the hot conductors back and forth in the same conduit would cancel each other anyhow?
The short version of the question...Is the grounded conductor required to be present at a switch/disconnect?
Thanks for any input
I've seen as common practice when backfeeding a PV breaker in a service panel, when an outside utility disconnect is also required, installing a Type "T" conduit body and sending Line 1 and Line 2 out to the disco as a switch loop.
Seems like this violates 300.3? There really shouldn't be inductive heating, as inverter outputs are balanced and there is no current on the grounded conductor anyhow. Also, the hot conductors back and forth in the same conduit would cancel each other anyhow?
The short version of the question...Is the grounded conductor required to be present at a switch/disconnect?
Thanks for any input