Grounding Conductor Over Concrete
Grounding Conductor Over Concrete
(OP)
Hello,
Is it acceptabile to lay substation grounding mesh cupper conductor over a lean concrete of the foundation of cable trench in some places, knowing that the conductor will touch bars and there will be another layer of concrete over the conductor. Dose the cupper conductor get chemical interaction with the concrete or bars. There is suggestion to pull grounding conductor in such places through pvc sleevs of length 3.60 meters but I am afraid that this affect on discharging short circuit current.
We facing this situation as the contractor didn't pulled grounding conductor before making lean concrete of the cable trench.
Thanks
Is it acceptabile to lay substation grounding mesh cupper conductor over a lean concrete of the foundation of cable trench in some places, knowing that the conductor will touch bars and there will be another layer of concrete over the conductor. Dose the cupper conductor get chemical interaction with the concrete or bars. There is suggestion to pull grounding conductor in such places through pvc sleevs of length 3.60 meters but I am afraid that this affect on discharging short circuit current.
We facing this situation as the contractor didn't pulled grounding conductor before making lean concrete of the cable trench.
Thanks






RE: Grounding Conductor Over Concrete
The fact that the conductor is touching the bars is not a problem. But usualy for grounding is not used copper, becouse it has a high cost, it is used NiZn conductors. But if you use copper i don´t know if it will interact with the concrete.
RE: Grounding Conductor Over Concrete
It would be better to clamp the ground wire to the rebar, thereby using the reinforced concrete trench as an additional grounding electrode.
RE: Grounding Conductor Over Concrete
RE: Grounding Conductor Over Concrete
the corrosion in reinforced rebar Is a concern, additinal tickness or increase in rebar should be consider.
In several grounding fcilities, the concrete rebar and the semiconducting characteristics of the concrete was used to design an equipptential mesh taking advantageof the high moisture content in concrete and the conductivity of the steel rebar tied to copper loops. Ths arangement is safe, however test are recommende to verify that not be significant voltage difference between adjacent points to qualify the concrete slab as an equipptential surface.