3.4.1
Exterior Location
Mount[ substation][ and][ switchgear] on concrete slab. Unless otherwise
indicated, the slab shall be at least 200 mm 8 inches thick, reinforced
with a 152 x 152 - MW19 x MW19 6 x 6 - W2.9 x W2.9 mesh, placed uniformly
100 mm 4 inches from the top of the slab. Slab shall be placed on a 150 mm
6 inch thick, well-compacted gravel base. Top of concrete slab shall be
approximately 100 mm 4 inches above finished grade. Edges above grade
shall have 15 mm 1/2 inch chamfer. Slab shall be of adequate size to
project at least 200 mm 8 inches beyond equipment, except that front of
slab shall be large enough to serve as a platform to withdraw breakers or
to operate two-high breaker lifters.
Provide conduit turnups and cable
entrance space required by the equipment to be mounted[ and as indicated].
Seal voids around conduit openings in slab with water- and oil-resistant
caulking or sealant. Cut off and bush conduits 75 mm 3 inches above slab
surface. Concrete work shall be as specified in Section 03300N
CAST-IN-PLACE CONCRETE.
3.4.2
Interior Location
Mount[ substation][ and][ switchgear] on concrete slab. Unless Otherwise
indicated, the slab shall be at least 100 mm 4 inches thick. Top of
concrete slab shall be approximately 100 mm 4 inches above finished floor.
Edges above floor shall have 15 mm 1/2 inch chamfer. Slab shall be of
adequate size to project at least 200 mm 8 inches beyond the equipment,
except that front of slab shall be large enough to serve as a platform to
withdraw breakers or to operate two-high breaker lifters. Provide conduit
turnups and cable entrance space required by the equipment to be mounted.
Seal voids around conduit openings in slab with water- and oil-resistant
caulking or sealant. Cut off and bush conduits 75 mm 3 inches above slab
surface. Concrete work shall be as specified in Section 03300N
CAST-IN-PLACE CONCRETE.
3.5
FIELD QUALITY CONTROL
3.5.1
Performance of Acceptance Checks and Tests
Perform in accordance with the manufacturer's recommendations and include
the following visual and mechanical inspections and electrical tests,
performed in accordance with NETA ATS.[ The [_____] Division, Naval
Facilities Engineering Command will witness formal tests after receipt of
written certification that preliminary tests have been completed and that
system is ready for final test and inspection.]
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NOTE: Thermographic surveying is not required on
most projects. NETA recommends that surveys be
performed during periods of maximum possible loading
but with not less than 40 percent of rated load on
the electrical equipment being inspected. Testing
at start-up will therefore not be beneficial except
for hard-to-reach areas where solid connections
cannot be verified by mechanical methods.
Thermographic surveying may be useful if equipment
operates under load for a specified period of time,
preferably 3 to 6 months, before testing. The
additional costs and the additional trip (3 to 6
months after the initial inspection) for the NETA
SECTION 16361N
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