Originally Posted By: jpeck
This post was automatically imported from our archived forum.
That was a "Yes" and a "No", depending on what, where, and how.
I thought that part of the code was pretty much self-explanatory (unlike many sections), so I did not add to it.
However, here it is:
250.64 Grounding Electrode Conductor Installation.
Grounding electrode conductors shall be installed as specified in 250.64(A) through (F).
WHAT - (A) Aluminum or Copper-Clad Aluminum Conductors.
WHERE - Bare aluminum or copper-clad aluminum grounding conductors shall not be used where in direct contact with masonry or the earth or where subject to corrosive conditions.
HOW - Where used outside, aluminum or copper-clad aluminum grounding conductors shall not be terminated within 450 mm (18 in.) of the earth.