It appears that you are describing a Ufer ground. It should not explode,
especially if these internal ground rods were properly bonded to the rebar.
John KK9A
Ken G Kopp K0PP wrote:
I should have been more specific in suggesting that grounds that
might end up carrying a lightening charge not be run through concrete.
The following is from personal "real world" experience.
I know of two specific cases where tower bases were blown apart by
lightning hits to the towers because ... in the interest of "neatness" ...
their ground rods were -inside- the concrete bases.
These two events took place in the Tampa Bay (St. Petersburg) area
of Florida. The Tampa Bay area has the distinction of having the highest
number of lightening strikes in the western hemisphere, BTW.
I worked aboard a USC&GS (NOAA) ship at the time and we did a lot of
lightening-related research. Picture flying a balloon-borne wire to
deliberately
attract lightening!
Concrete is rarely "dry" even after years of "curing". The dampness becomes
steam that's instantly created by the current from strike flowing through
the
ground that's -inside- the concrete. This steam becomes part of the
explosion.
73!
Ken Kopp - K0PP
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