combinations of sections as they are installed. Each section or
progressive combination of sections shall be tested with a megohmmeter
providing a voltage of approximately 1000 volts, a direct reading in
resistance. Results shall be documented. Faults indicated by these tests
shall be eliminated before proceeding with the circuit installation.
3.22.5
Electrical Acceptance Tests
Acceptance tests shall be performed for series and multiple airfield and
heliport lighting circuits only on complete lighting circuits. Each series
and multiple lighting circuit shall receive a high voltage insulation test.
3.22.5.1
Low-Voltage Continuity Tests
Each series circuit shall be tested for electrical continuity. Faults
indicated by this test shall be eliminated before proceeding with the
high-voltage insulation resistance test.
3.22.5.2
High-Voltage Insulation Resistance Tests
Each series lighting circuit shall be subjected to a high-voltage
insulation resistance test by measurement of the insulation leakage current
with a suitable high-voltage test instrument which has a steady, filtered
direct current output voltage and limited current. High-voltage tester
shall include an accurate voltmeter and microammeter for reading voltage
applied to the circuit and resultant insulation leakage current. Voltages
shall not exceed test values specified below.
a.
Test Procedure: Both leads shall be disconnected from regulator
output terminals and support so that air gaps of several inches
exist between bare conductors and ground. Cable sheaths shall be
cleaned and dried for a distance of 300 mm 1 foot from ends of
cables and exposed insulation at ends of cables. Ends of both
conductors of the circuit shall be connected together and to
high-voltage terminals of test equipment, and test voltage applied
as specified in the following tabulation between conductors and
ground for a period of 5 minutes.
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
SECTION 16526A
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