NOTE: Include the following option when key
interlocking is specified.
**************************************************************************
[(7)
Test interlock systems for proper operation and sequencing.]
b.
Electrical Tests
(1)
Perform contact-resistance tests.
[(2) Trip fault interrupters by operation of overcurrent control[
and remote trip].]
(3)
Perform insulation-resistance tests.
(4) Perform an over-potential test on each switched way pole with
the switched way in the open position in accordance with the
manufacturer's instructions.
[(5) Set fault interrupter overcurrent control in accordance with
government provided settings. Request settings from government,
in writing, a minimum of 30 days prior to scheduling electrical
tests.]
3.4.1.2
Grounding System
a.
Visual and Mechanical Inspection
Inspect ground system for compliance with contract plans and
specifications.
b.
Electrical Tests
Perform ground-impedance measurements utilizing the
fall-of-potential method. On systems consisting of interconnected
ground rods, perform tests after interconnections are complete.
On systems consisting of a single ground rod perform tests before
any wire is connected. Take measurements in normally dry weather,
not less than 48 hours after rainfall. 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 rod or
grounding systems under test.
Submit the measured ground resistance of each ground rod and
grounding system, indicating the location of the rod and grounding
system. Include the test method and test setup (i.e., pin
location) used to determine ground resistance and soil conditions
at the time the measurements were made.
3.4.2
Follow-Up Verification
Upon completion of acceptance checks and tests, the Contractor shall show
by demonstration in service that devices are in good operating condition
and properly performing the intended function. Test shall require each item
to perform its function not less than three times. As an exception to
requirements stated elsewhere in the contract, notify the Contracting
Officer 5 working days in advance of the dates and times for checks and
SECTION 16341N
Page 14
Previous Page
