shield-continuity test shall be performed on the length of new and
existing cable including the splice. After a satisfactory
insulation-resistance test, a DC high-potential test shall be
performed on the completed cable system utilizing a test voltage
75 percent of new cable tested value.
3.2.1.3
Ground Rods
Perform ground resistance tests for ground rods before any wire is
connected. Take measurements in normally dry weather, not less than 48
hours after rainfall. Ground resistance shall also be measured for each
piece of equipment and medium voltage cable splice to the ground electrode.
Use a portable ground testing megger in accordance with manufacturer's
instructions to test each ground or group of grounds. The instrument shall
be equipped with a meter reading directly in ohms or fractions thereof to
indicate the ground value of the ground electrode under test.
3.2.2
Approval of Test Results
**************************************************************************
NOTE: Use this paragraph of specifications covering
work under SOUTHNAVFACENGCOM cognizance.
**************************************************************************
Medium voltage cable test results shall be approved by SOUTHNAVFACENGCOM
(Code 074).
3.3
SCHEDULE
Some metric measurements in this section are based on mathematical
conversion of inch-pound measurements, and not on metric measurement
commonly agreed to by the manufacturers or other parties. The inch-pound
and metric measurements are as follows:
PRODUCTS
INCH-POUND
METRIC
a.
Fireproofing Tape
- Thickness
30 mils
0.762 mm
- Width
3 inches
75 mm
b.
Pull Wire
- Tensile strength
200 pounds
890 Newton
c.
Ground Rod
- Diameter
3/4 inch
19 mm
- Length
10 feet
3050 mm
-- End of Section --
SECTION 16302N
Page 42
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