3.5.2
Construction Tests
**************************************************************************
NOTE: Coordinate the construction test requirements
with the other specification sections to eliminate
redundant tests and provide additional reference to
necessary tests.
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Individual component and equipment functional tests for fuel piping,
coolant piping, and lubricating-oil piping, electrical circuit continuity,
insulation resistance, circuit protective devices, and equipment not
provided by the engine-generator set manufacturer shall be performed prior
to connection to the engine-generator set.
3.5.2.1
Piping Test
a.
Lube-oil and fuel-oil piping shall be flushed with the same type
of fluid intended to flow through the piping, until the outflowing
fluid has no obvious sediment or emulsion.
b.
Fuel piping which is external to the engine-generator set shall be
tested in accordance with NFPA 30. All remaining piping which is
external to the engine generator set shall be pressure tested with
air pressure at 150% of the maximum anticipated working pressure,
but in no case less than 1 MPa 150 psig, for a period of 2 hours
to prove the piping has no leaks. If piping is to be insulated,
the test shall be performed before the insulation is applied.
3.5.2.2
Electrical Equipment Tests
**************************************************************************
NOTE: Delete ground resistance test where covered
by other project specifications, or where no grounds
are installed.
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a.
Low-voltage cable insulation integrity tests shall be performed
for cables connecting the generator breaker to the [automatic
transfer switch] [panelboard] [main disconnect switch]
[distribution bus] [_____]. Low-voltage cable, complete with
splices, shall be tested for insulation resistance after the
cables are installed, in their final configuration, ready for
connection to the equipment, and prior to energization. The test
voltage shall be 500 volts dc, applied for one minute between each
conductor and ground and between all possible combinations
conductors in the same trench, duct, or cable, with all other
conductors in the same trench, duct, or conduit. The minimum
value of insulation shall be:
R in megohms = (rated voltage in kV + 1) x 304,800/(length of
cable in meters).
(R in megohms = (rated voltage in kV + 1) x 1000/(length of cable
in feet)
Each cable failing this test shall be repaired or replaced.
The
repaired cable shall be retested until failures have been
eliminated.
SECTION 16264A
Page 59
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