In doing some homework prior to getting a generator transfer switch installed, it became apparent that houses need tb "Grounded" - and the typical ground is one or more copper rods pounded into the ground and then attached to a (neutral?) wire in the breaker panel.
This house is a split-level, crawl space but no basement, built in the fifties and I am unable to find anything that even looks like a ground.
One reason for no ground might be what the house is built on: a shale ridge. The builder scooped a notch out of a hillside, sold the topsoil, and built this house on the notch. Go down about 4", and you hit shale that is so solid that you need an air hammer or a breaker bar and lots of time to get through - as in 3 days with a breaker bar and a tin cup to make 2 4" wide 28" deep holes for a boat rack I put in last year.
Realistically, we've been in this house for 30+ years and never lost an appliance to electrical surge... but still... there's got tb good reasons for grounding.
That being said, I'm exploring after-the-fact methods.
The obvious is the copper pipe that water comes in on: buried several feet deep and running a good 30' to the main under the street. Seems like this was SOP until some time in recent history when it was deemed inadequate.
The second thing that comes up is a "Ufer" ground wherein the ground wire is tied to rebar in the house's foundation. I can find a lot of articles on the techniques of doing this in new construction, but nothing about retrofits.
The third approach seems tb lateral: long trenches in the yard with the grounding medium layed in the trench. Seems impractical to me bc the standard calls for 30" deep...
Has anybody been here: retrofitting a ground system to a house built on shale or rock?