bonding and grounding
bonding and grounding
(OP)
I have an existing building and a new building. The new building is to be constructed immediately next to the existing with a fire separation wall between them. They are to be two (2) separate bldgs. The existing bldg is concrete block and steel and new bldg is all steel construction. Each has a separate service at 208/3. The services are 400+ feet apart. Each bldg has a separate water service and grounding electrode system. Is it best to tie the steel structure of the existing and new bldg together? Is it necessary to tie the water mains and grounding electrode systems together or will the steel structure tie suffice?






RE: bonding and grounding
250.58 Common Grounding Electrode. Where an ac system
is connected to a grounding electrode in or at a building
or structure, the same electrode shall be used to ground
conductor enclosures and equipment in or on that building
or structure. Where separate services, feeders, or branch
circuits supply a building and are required to be connected
to a grounding electrode(s), the same grounding electrode(
s) shall be used.Two or more grounding electrodes that are bonded together
shall be considered as a single grounding electrode
system in this sense.
I think you have to bond together the foundation grounding of both buildings. The water pipe shall be connected to the grounding electrode in both buildings.
RE: bonding and grounding
Bill
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"Why not the best?"
Jimmy Carter
RE: bonding and grounding
My question is per the NEC is tieing the steel structure of the two buildings together enough for the grounding electrode systems to be " effectively bonded together" and " considered as a single grounding electrode system in this sense." ( NEC 250.58)
RE: bonding and grounding
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: bonding and grounding
RE: bonding and grounding
M. Nissen,P.E.
Senior Electrical Engineer
Waldron Engineering & Construction