Mike Dolt Enterprises
Mike Dolt Enterprises
User: Dark Sparky, Location: USA
Asked on: Monday, April 4, 2011 at 4:44 pm EDT
Answered on: Tuesday, May 14, 2024 at 3:45 am EDT
Question: We have a water reservoir, being constructed of reinforced concrete. It is approximately 400' x 200' in size. A subconsultant performed the electrical design.No electrical equipment and no electric service is present at this structure.The original design did not include grounding (ground rods) for the structure. The reservoir is now under construction. The subconsultant has had a change of electrical staff, and the new electrical engineer feels that grounding IS required. They are proposing a ground ring around the reservoir, bonded to the rebar in the concrete.Based on the below comments - from another thread - I am uncertain if the grounding is required.Does this structure require grounding? If so, please generally describe what is required.Thank you.Refer to this thread where the following statement was agreed upon:"If the water pipe, the structural steel and/or the concrete encased electrodes are present, there is no need for ground rods to be installed.":http://forums.mikeholt.com/showthre...?highlight=concrete+ground+without+electrical
Requirement for Grounding
According to the reference thread you provided, if the following elements are present, grounding is not required: Water pipe Structural steel* Concrete encased electrodesPresence of Elements
In your case, the reservoir is constructed of reinforced concrete, which satisfies the requirement for "concrete encased electrodes." Since there is no mention of water pipes or structural steel, we can assume that they are not present.
Conclusion
Based on the information provided, grounding is not required for this water reservoir structure since it is constructed of reinforced concrete, which serves as a sufficient grounding system.
Additional Considerations
If there were any electrical equipment or electrical service present at the structure in the future, it would be necessary to provide a grounding system in accordance with applicable electrical codes. Flag for review