Today the code is that you have one entrance with the ground and neutral bonded to ground.
From there the rest of your place would be wired with 4 wires, one is a dedicated ground wire that doesn't bond to the neutral any other boxes.
Back a decade or so and before, treating each building as its own service with its own ground and neutral bond, and fed by 3 wires without a dedicated ground wire was acceptable in many cases.
So, what should you have? The 4 wires everywhere is probably better, but the three wire feed with individual service per building is grandfathered in and appears to be 'safe enough' for most uses.
My place was rewired in 2008 and still was allowed the 3 wire feed with separate service per building, bonded at each building. No one was excited about it, the electricians, inspector, etc. the three wire was perfectly fine for my uses on the farm. I have 11 buildings wired on the place.
The 11th one came later, and needed a separate isolated ground wire to the nearest junction box. It didnt need to carry all the way to the main service. This was fine with electrician and inspector. So I'm a hybrid setup I guess.
The electrical work was replacing the main services to the existing buildings. As long as we stopped at the box in the buildings only the backbone had to be to current code and inspected. Whatever was inside the buildings could stay as it was. Most is just 2 wire from the 1950s without a ground even, so the whole grounding deal is kinda moot at my place....
Everything done in 2008 and beyond was done by electricians, no homeowner engineering, and inspector checked it all out. In fact I was worried for the inspector, he had a box open testing stuff and a cat jumped on him with claws out, I thought we might get a fried inspector or cat from that.......
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Today's Featured Article - Timing Your Magneto Ignition Tractor - by Chris Pratt. If you have done major engine work or restored your tractor, chances are you removed the magneto and spark plug wires and eventually reached the point where you had to put it all back together and make it run. On our first cosmetic restoration, not having a manual, we carefully marked the wires, taped the magneto in the position it came off, and were careful not to turn the engine over while we had these components off. We thought we could get by with this since the engine ran perfectly and would not need any internal work. After the cleanup and painting was done, we began reassembly and finally came to t
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