Carultch
Senior Member
- Location
- Massachusetts
As the title implies, what happened to 690.8(B)(2)(c) from NEC2011?
The text reads:
"The conductor selected, after applications of conditions of use, shall be protected by the overcurrent protective device, where required."
And particularly, does this rule still apply, even though not explicitly written in 690.8 for the PV-specific wire sizing algorithm? It seems like a general enough rule, that this might be the case. But it would help if it were still part of 690.8, to simplify making sure that your checklist is complete for all the wire sizing requirements.
The absence of this rule in 690.8 makes it difficult to rebut challengers of your design, when this particular rule would require an increased size above 1.56*Isc for terminations and 1.25*Isc/total derate for conductor ampacity.
So the question remains. Is this a rule that was intentionally eliminated to no longer require it? Or is it eliminated because it is implied by the first four chapters?
The text reads:
"The conductor selected, after applications of conditions of use, shall be protected by the overcurrent protective device, where required."
And particularly, does this rule still apply, even though not explicitly written in 690.8 for the PV-specific wire sizing algorithm? It seems like a general enough rule, that this might be the case. But it would help if it were still part of 690.8, to simplify making sure that your checklist is complete for all the wire sizing requirements.
The absence of this rule in 690.8 makes it difficult to rebut challengers of your design, when this particular rule would require an increased size above 1.56*Isc for terminations and 1.25*Isc/total derate for conductor ampacity.
So the question remains. Is this a rule that was intentionally eliminated to no longer require it? Or is it eliminated because it is implied by the first four chapters?