A metal water pipe that has a minimum of ________ ft in direct contact with the earth is considered a grounding electrode.

A grounding electrode conductor shall not be connected in a wireway or other accessible enclosure on the supply side of the disconnecting means to ____________________________.

Where used outside, aluminum, or copper-clad aluminum grounding electrode conductors shall not be terminated within _________________ of the earth.

The grounding electrode conductor shall be of copper, aluminum, ___________________, or the items as permitted in 250.68(C).

Bonding together of all separate grounding electrodes will _____________ between them and between their associated wiring systems.

Where an AC system is connected to a grounding electrode in or at a building or structure, ___________.

If used as a grounding electrode, metal underground water pipe shall meet the requirements of

T/F: If practical, rod, pipe, and plate electrodes shall be embedded above the permanent moisture level.

Which of the following systems and materials shall not be used as grounding electrodes?

Concrete-encased electrodes of existing buildings or structures shall not be required to be part of the grounding electrode system where ______________.