Re: [RE-wrenches] Grounding Top of Pole Mount Array with a Ufer

I wasn't clear or accurate in my comment " a lot more surface area in 8" pipe 5-6 feet into the earth" which we have never done.  should have said "5-6 feet into 1.5 yards of concrete embedded in the ground"  Having seen many instances of steel in concrete from demo jobs, little or no rust

Re: [RE-wrenches] Grounding Top of Pole Mount Array with a Ufer

Words of wisdom Ray! One has to occasionally measure the impedance especially if you are in lightning country! I wish the midnite spd's had another blue led that told you impedance was in a good range. Probably not easy, but a nice dream! Dave Angelini Offgrid Solar "we go where powerlines d

Re: [RE-wrenches] Grounding Top of Pole Mount Array with a Ufer

Copper can get a pretty good oxide layer on it as well, but I'm not versed in the science enough to know how any of that effects the conductivity. Instead, I assume that the NEC has investigated corrosion, and so we just follow the code. For plate electrodes (250.52(A)(7)), it just specifies di

Re: [RE-wrenches] Grounding Top of Pole Mount Array with a Ufer

That’s why we use the Ufer, our AHJ assumes that once a layer of rust develops this is not valid... Dana Orzel Great Solar Works, Inc. C - 208.721.7003 d...@solarwork.com Idaho Contractor - # 028765 Idaho PV # 028374 NABCEP # 0