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I leave my generator connected to the house for load testing. My transfer switch only switches the 2 hot legs, the ground and neutral are always connected....so no need to add another ground at the generator or mess with the bonding strap at the generator.

But it is connected at the same time. Most transfer switches are only 2 poles (only switching over the 2 hot legs). The Neutral is still connected to the utility. Even if you have a 3 pole transfer switch, your breaker panel has a bonded ground to a rod at your house. So so even if you...

I 100% understand grounding. My question has to do with this particular setup. If the generator is grounded via the house ground wire, the current has over 150-200feet to travel before it grounds out at the service entrance. That all equates to resistance. Or the stray current can travel...

There isn't much, if any paint in the bottom of the skids (as it gets scraped away every time the gen is moved). And while silica isn't conductive, wet organic soil is (as we have in South Florida). In some places down here, you'll hit the water table with a ground rod after a couple feet...

Question. Wouldn't having the skids on the ground be grounding the gen. That's 11 feet of 2" skids...throw in a rain storm...

I stand corrected. Thank you

If you do that, then the generators housing is no longer grounded and a rod should be used to ground the housing.

Hope everything went well

I've never seen so much confusion on "grounding". You should only be using 1 ground at a time. Your house is grounded at at the service entrance. Since you are using an interlock and and breaker as your transfer switch, you are only opening both hot legs. Your Neutral is always connected...