Is it just me or did the "Ground the hell out of it" group totally screw up the 2011 code?
I've got an array field with (4) combiners (2-12 string and 2- 13 string) going to a recombiner. output ampacity required 694a.
So I'm running parallel 500kcm conductors to the inverter from the recombiner.
225kw 480v inverter puts out 271a 3?, requires 500kcm conductors (all copper)..
Per the code the combo ground needs to be "no smaller than the largest DC conductor", so the ground is parallel 500's and the 480v inverter output is single 500's???
Is there any way to put sanity into the equasion? pretty hefty ground since the GEC isn't really for fault current anyway?
Is there something I missed?
I've got an array field with (4) combiners (2-12 string and 2- 13 string) going to a recombiner. output ampacity required 694a.
So I'm running parallel 500kcm conductors to the inverter from the recombiner.
225kw 480v inverter puts out 271a 3?, requires 500kcm conductors (all copper)..
Per the code the combo ground needs to be "no smaller than the largest DC conductor", so the ground is parallel 500's and the 480v inverter output is single 500's???
Is there any way to put sanity into the equasion? pretty hefty ground since the GEC isn't really for fault current anyway?
Is there something I missed?