Since the storm came and went, I would like to ask a question. With the whole house generators, what do people see out there? Are the generators manufactures instructions calling for installing a ground rod at the new generator? Or no ground rod? Or are they leaving it up to the local AHJ? Any thoughts/comments?
If you were using a generator to supply tents at a fair or something like that, Then I can see the need for a ground rod. You would then be generating your own neutral terminal at the gen. itself. At this point, I would think that the EGC would have to be a #6 cu to 2-grounding electrodes 6' apart.
If you were using a generator to supply tents at a fair or something like that, Then I can see the need for a ground rod.
The funny thing about that idea is if you just have a portable generator running cord and plug loads, the NEC doesn't require a rod and grounding the neutral actually makes the installation more dangerous.
All the gens used at a golf tournament had 2 grd rods each bonded to the neutral buss at the main. These were 70KW to 2 MW units feeding everything from a 10x10 shade cover to 50kSF membrane structures.
We utilized some portable units, mostly for 120 volt power used while we were working. No ground rods for them.
I used a 6500W portable at my home for 18 days, grd from twistlock to my main panel. Backfed CB, LOTO on main CB.