MIL-DTL-24317B
4.8.13 Dielectric withstanding voltage (see 3.16). Switches shall be tested in accordance with 4.8.13.a
4.8.13.1 At atmospheric pressure. Switches shall be tested in accordance with method 301 of MIL-
STD-202. The following details and exception shall apply:
(a) Special preparations or conditions The tests shall be conducted with the unit in its normal
position and shall be repeated for all other operating positions. Lamps, if applicable, shall be
removed from the switch before these tests.
(b) Magnitude of test voltage 1,000 volts, rms.
(c) Nature of potential AC.
(d) Duration of application of test voltage One minute for qualification and group C inspection; five
seconds for other tests.
(e)
Points of application
(1) Between all terminals and ground.
(2) Between all adjacent contact terminals of different poles.
(3) Between all unconnected terminals of the same pole.
(4) When applicable, between lamp circuit terminals and unconnected switch contact
terminals.
(f) Examination after test Switches shall be examined for arcing, flashover, and breakdown, and
current flow in excess of 10 microamperes.
4.8.13.2 At reduced barometric pressure. Switches designed for operation above 10,000 feet shall be
details and exception shall apply:
(a) Method of mounting Normal mounting means.
(b) Test-condition letter C, unless otherwise specified (see 3.1).
(c) Test voltage 400 volts rms.
MIL-STD-202. The following detail and exception shall apply:
(a) Test-condition letter B.
(b) Examination after exposure Switches shall be subjected to 10 cycles of operation of making
and breaking the rated resistive current at the lowest dc voltage specified (see 3.1), after a 6 hour
drying period in a forced draft oven, at a temperature of approximately 57°C.
After the test, switches shall be examined for evidence of excessive corrosion, warping, cracking, any
other damage, and when applicable, color fading of the lenses.
4.8.15 Insulation resistance (see 3.18). Switches shall be tested in accordance with method 302 of
MIL-STD-202. The following details shall apply:
(a) Test-condition letter B.
(b) Special conditions As specified in 4.8.13.1(a).
(c) Points of measurement As specified in 4.8.13.1(e).
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