Where Does the Grounding System End?‏

Where Does the Grounding System End?‏

Several questions are always asked "where does the grounding system end"?

The goal is to get the electricity to flow to ground. There are several ways to do this, including –

1- Through metal water supply pipes

2- Through metal rods driven into the ground

3- Through wires buried in the footings of buildings

4- Buried grounding plates or rings

5- The frames of metal buildings (more common in commercial than residential construction)

6- The metal castings of private water supply lines

In some areas, metal water pipes running to the street water mains are being replaced with plastic. This defeats the grounding system, and it is impossible to detect during your inspection.

Various jurisdictions have different requirements, and like all code issues the requirements have changed over time. For example, after 1987, ground into a metal supply waterpipe alone is not satisfactory. There must also be a grounding rod, because plastic water piping is becoming so popular.

HAPPY REHABBING!!!

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