solarken
NABCEP PVIP
- Location
- Hudson, OH, USA
- Occupation
- Solar Design and Installation Professional
I am looking at expanding a PV system that was installed by a certain solar company that went bankrupt. The current system has a single pair of 10AWG THHN and an oversized 6AWG THHN ground in 70ft of buried 3/4 EMT. The installer/designer did this customer no favors by undersizing the array in the first place, then used small conduit and no spare conductors in the DC run. There is plenty of space on the garage roof for more PV. I usually use PVC for underground, and I would have used larger than 3/4 for this and/or pulled in one spare pair to make future expansion easier. I need to decide whether to add another pair of 10AWG conductors in the DC run or just add one string on the garage and utilize the existing capacity of the single pair.
Any thoughts on difficulty of pulling out the existing 2x10AWG + 1x6AWG gnd wiring and pulling in 4x10AWG + 1x10AWG gnd, with this buried 3/4 EMT? I am guessing it is filled with water.
Any thoughts on difficulty of pulling out the existing 2x10AWG + 1x6AWG gnd wiring and pulling in 4x10AWG + 1x10AWG gnd, with this buried 3/4 EMT? I am guessing it is filled with water.