sandman.saunders8
Member
- Location
- Tucson, AZ, USA
This is fixed in the 2014 code. 125% of the inverter's maximum output current is carried all the way back to the service for the 120% rule calculations. The size of the OCPD is no longer used.
thanks all for the help.
The conversation here has brought up another question.
Suppose I have 167A of Inverter output, all run into an AC combiner panel. This number time continuous duty (125%) is : 166.7 x 1.25 = 208.4 Amps. But I can only fit (physically) a 200A switch into the gear. SO, I use fully rated fuses in the 200A switch, lets say they are 175A (just above the 166.7 amp) (note - I checked with littlefuse who says that all fuses under 600A are 100% rated). The point is that I save myself from having to install a 400 switch with 225A fuses. I would however size my conductors for 208A.
Additionally could I not install a utility required 200A non-fused PV disco (external to gear) ahead of the gear. these are fully rated.
Does anyone see an issue with this?