Not only did TPVFDP ignore "250.53(D)(1) Supplemental
Electrode Required." TPVFDP also failed to carefully read and
therefore totally misconstrued what was posted. Water pipe
must be bonded to remove electricity from that water pipe.
IOW safety ground system must connect to water pipe. But
water pipe alone is not sufficient for earth grounding. Even
if water pipe is used as an earth ground, still another
earthing ground must be installed.

Post the specific statement where I say, "you can forgo
connecting to an underground metal water pipe if you have
another electrode." You made that mistake of reading
selectively previously. I corrected you then. Why do you
'only read what you want to read' again?

Water pipes must be grounded to remove electricity from
those pipes. The list of acceptable earth grounds are in
250.52(A)(2) through (A)(7). They are (and to repeat again)
metal frame of building or structure, concrete-encased
electrode, ground ring, rod and pipe electrodes, plate
electrodes, other local metal underground systems or
structures. The water pipe [of 250.52(A)(1)] is no longer
sufficient for earth grounding as stated quite bluntly in
"252.53(D)(2) Supplemental Electrode Required"


Some jurisdictions (some gas companies) require a ground
connection to gas pipe just like to water pipe. Consult local
company for details. Again not bonded for earth grounding.
That connection required by some gas companies is to remove
electricity from interior gas pipe. Again the concept.
Neither water nor gas pipes are either sufficient or
acceptable as an earth ground. But connection to pipes is
(water) or may be (gas) required to remove electricity from
those pipes. List of required earth ground is 250.52(A)(2)
through (A)(7).

Takoma Park Volunteer Fire Department Postmaster wrote:
W Tom's position is that you can forgo connecting to an underground
metal water pipe if you have another electrode. Did you read the
first section of the US NEC that I quoted? It says
"250.50 Grounding Electrode System.
If available on the premises at each building or structure served,
each item in 250.52(A)(1) through (A)(6) shall be bonded together to
form the grounding electrode system. Where none of these electrodes
are available, one or more of the electrodes specified in 250.52(A)(4)
through (A)(7) shall be installed and used. "
Note the use of the prescriptive SHALL in the first sentence. If the
water pipe is there you must use it as part of the grounding electrode
system. That remains true even when there is no other metallic piping
present. Surely you are not saying that the underground metal water
pipe in a building with no interior metallic piping is "likely to
become energized" thus falling under the bonding requirement.
--
Tom