Well casing

[nizak]

Does a well need to be part of the grounding electrode system if its present?

I have driven ground rods at the service currently.

I don’t know the integrity of the pipe from the point in the basement to the casing.

Well has been non used for several years since city water became available.

City water comes in as plastic.

 

[infinity]

No the well casing is not required to be used as an electrode.

250.52(A)(6) Other Listed Electrodes.
Other listed grounding electrodes shall be permitted.
250.52(A)(7) Plate Electrodes.
Each plate electrode shall expose not less than 0.186 m2 (2 ft2) of surface to exterior soil. Electrodes of bare or electrically conductive coated iron or steel plates shall be at least 6.4 mm (1∕ 4 in.) in thickness. Solid, uncoated electrodes of nonferrous metal shall be at least 1.5 mm (0.06 in.) in thickness.
250.52(A)(8) Other Local Metal Underground Systems or Structures.
Other local metal underground systems or structures such as piping systems, underground tanks, and underground metal well casings that are not bonded to a metal water pipe.

 

[nizak]

“Not bonded to a metal water pipe.”

That means a municipal water system?

 

[Buck Parrish]

“Not bonded to a metal water pipe.”

That means a municipal water system?

It could mean plactic. Black plastic to the well has been very common for 50 years or better.

 

[infinity]

“Not bonded to a metal water pipe.”

That means a municipal water system?

As Buck stated metal water pipe for the well.

 

[don_resqcapt19]

The metal well casing is required to be used as grounding electrode, unless the well casing is bonded to a metal water pipe.

250.52(8) Other Local Metal Underground Systems or Structures.
Other local metal underground systems or structures such as piping systems, underground tanks, and underground metal well casings that are not bonded to a metal water pipe.

 

[infinity]

It says required for electrodes (A1)-(7) not (A8).

 

[tom baker]

WA requires the metal well casing to be part of the building GES if within ten ft of building

 

[don_resqcapt19]

It says required for electrodes (A1)-(7) not (A8).

I did not go back and read 250.50

 

[kwired]

Do we know if the casing is metal?

top portion that sticks out of the ground is often metallic but many newer wells this turns to plastic at about 5-6 feet down and is plastic most of the rest of the depth.