[RE-wrenches] NEC 2020 - 705.12(B)(6)

[Jason Szumlanski]

Does anyone else think they botched the wording in this section? It's still
not clear, and we have a ton of meter/main combos with feed-through lugs
around here.

Where is it written, "where an overcurrent device is installed at the *supply
end* of the feed-through conductors," (emphasis added) are they referring
to the solar backfed breaker on the busbar or another breaker somewhere
along the feeder circuit? It goes on to state that the loads on the
supplying busbar can comply with any method in 705.12(B)(3), which
prescribes an OCPD at the load end of the feeder in 705.12(B)(3)(3), so
they can't be talking about that. I have to assume it is the solar
backfed breaker they are referencing.

See my interpretation of one scenario in the attached image.

We're a long way off from the 2020 code implementation here, but it can
help sway plans examiners looking to clarify the intent of the 2014/2017
code cycles.


Jason Szumlanski
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