I'd like to describe an installation I saw yesterday, and get your thoughts. I apologize for not having pics, but I'll try to be clear.
The location was a small store, with paved parking completely around the little building. Out at streetside was a pole-mounted sign.
Power to the sign was provided by a circuit run in RMC. The RMC was simply laid atop the asphalt - no straps or anchors. Then the RMC was paved over, sort of.
The new pavement extended about four feet on either side of the pipe, and tapered from the existing parking lot to the top of the pipe. The finished result was an asphalt ramp on either side of the pipe, and the top of the pipe exposed to the sky.
To be fair to the paving crew, you did not notice these ramps when either driving or walking over the pipe. The location is such that a LOT of traffic goes directly over the pipe - yet there is no sign of damage to the pipe.
Would you consider this a proper install? Is the pipe 'supported' as required? What are your thoughts?
As to support, I guess the blacktop kind of keeps the pipe in place, but again it's not compliant. I've seem RGC kind of tuched away against a concrete curb, strapped to the curbing, and surronded by debris, but it was a repair that was not permitted or inspected.
I also came upon 3" RGC that was set into a 'speed bump' and the irrigation guy used it for a raceway to cross a private road. LOL!
BTW, I think you could drive a semi accross what you describe, with no damage to the RGC, as long as the blacktop holds up
If the pipe is under the surface, it is buried. The only thing that gets you a break is "concrete" Any other material is just "cover" whether it is dirt, gravel, sand or asphalt. It would be tougher to prove he couldn't just run it on the surface.
Traffic'd raceways need to be 24" cover even if they are low voltage runs.
I've seen a California job by illegal immigrant 'electricians' ( couldn't even speak halting English ) wherein they notched the concrete and asphalt - then laid in Schedule 40 PVC and pulled their circuits. A slight film of concrete buried their handicraft.
However, since the location was a Heavy-Duty Long Haul Truck Stop -- somehow I expect those circuits to fail.
As you might imagine the ENTIRE overhaul was un-permitted work. The owners were illegal immigrants, too -- this time from Turkey.
Take this scene, with a twist. Someone wants to run an underground service from pole to house. There is a lot of ledge rock and you can't dig deeper than 1 foot. Can you lay the pipe on the ledge rock, cover it with concrete, then put either dirt or pavement over it and still be code compliant?