Grounding and bonding conductors include all conductors used to bond
transformer enclosures, equipment frames and structural members to the
grounding grid. Grounding and bonding conductors shall be sized as shown.
After being located to provide maximum physical protection, exposed
grounding conductors shall be securely attached to structural supports at
not more than two foot intervals with suitable fasteners. Bends greater
than 45 degrees in ground conductors are not permitted. Routing of ground
conductors through concrete should be avoided. When concrete penetration
is necessary, nonmetallic conduit shall be cast flush with the points of
concrete entrance and exit so as to provide an opening for the ground
conductor, and the opening shall be sealed with a suitable compound after
installation.
3.4.4
Surge Arrester Grounding
**************************************************************************
NOTE: Provide a "detail" for surge arrester
grounding. For ungrounded and single-grounded
systems modify paragraph in accordance with IEEE C2
and TM 5-811-1/AFM 88-9 Chapter 1.
**************************************************************************
Surge arresters and neutrals shall be bonded directly to the transformer
enclosure and then to the grounding grid with a bare copper conductor,
minimum size [4/0] [as shown]. Lead lengths shall be kept as short as
practicable with no kinks or sharp bends.
3.5
FIELD TESTING
**************************************************************************
NOTE: Select types to suit project conditions and
delete all others. Delete all paragraphs not
applicable. Tests must be justified.
**************************************************************************
3.5.1
General
Field testing shall be performed in the presence of the Contracting
Officer. The Contractor shall notify the Contracting Officer [_____] days
prior to conducting tests. The Contractor shall furnish all materials,
labor, and equipment necessary to conduct field tests. The Contractor
shall perform all tests and inspections recommended by the manufacturer
unless specifically waived by the Contracting Officer. The Contractor
shall maintain a written record of all tests which includes date, test
performed, personnel involved, devices tested, serial number and name of
test equipment, and test results. All field test reports will be signed
and dated by the Contractor.
3.5.2
Safety
The Contractor shall provide and use safety devices such as rubber gloves,
protective barriers, and danger signs to protect and warn personnel in the
test vicinity. The Contractor shall replace any devices or equipment which
are damaged due to improper test procedures or handling.
3.5.3
Ground-Resistance Tests
The resistance of [each grounding electrode] [each grounding electrode
SECTION 16311A
Page 73
Previous Page
