as specified between conductors and for a period of 5 minutes as
follows:
Test Voltage, dc
First Test
Test on
Series
on New
Existing
Lighting Circuits
Circuits
Circuits
High Intensity Series
Lighting Circuits
(5,000-Volt Leads,
500- and 200-Watt
9000
5000
Medium Intensity
Series Lighting
Circuits (5,000-Volt
Leads, 30/45-Watt
6000
3000
600-Volt Circuits
1800
600
When additions are made to existing circuits, only new sections shall be
tested in accordance with "First Test on New Circuits" in table above. To
ensure reliable operation, complete circuit shall be tested at reduced
voltages indicated above.
b.
Leakage Current: Insulation leakage current shall be measured and
recorded for each circuit after a one-minute application of the
test voltage. If leakage current exceeds values specified below,
the circuit shall be sectionalized and re-tested and the defective
parts shall be repaired or replaced. Leakage current limits
include allowances for the normal number of connectors and splices
for each circuit as follows:
(1)
Three microamperes for each 300 m 1000 feet of cable.
(2) Two microamperes for each 200-Watt and each 500-Watt
5,000-volt series transformer.
(3) Two microamperes for each 30/45-Watt 5,000 volt series
transformer.
If measured value of insulation leakage current exceeds calculated value,
the circuit shall be sectionalized and specified test repeated for each
section. Defective components shall be located and repaired or replaced
until repeated tests indicate an acceptable value of leakage current for
the entire circuit.
3.20.5
Constant Current Regulator
Each constant current regulator shall be examined to ensure that porcelain
bushings are not cracked, no shipping damage has occurred, internal and
external connections are correct, switches and relays operate freely and
are not tied or blocked, fuses, if required, are correct, and liquid level
of liquid-filled regulators is correct. Relay panel covers shall be
removed for this examination; it is not necessary to open the main tank of
liquid-filled regulators. The instructions on the plates attached to the
SECTION 16525A
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