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|  MIL-S-55257C(CR)
4.5.3.5 Reinspection of conforming group C Sample units. After
corrective action has been taken, the failed unit and/or additional
sample units shall be subjected to group C inspection (all inspections,
or the inspections which the sample failed, at the option of the techni-
cal activity). Any or all group A inspections may also be reinstituted.
All damage resulting from any testing shall be repaired. Final accept-
ance and shipment will be withheld until the reinspection results have
shown that the corrective action was effective and approved by the tech-
nical activity.
(See 3.12)
4.6 Electrical installation tests.
(AN/ASM-146 & AN/ASM-147)
4.6,1 Insulation breakdown test.
a. Remove all resistive and inductive loads from the lines such
as power panel fuse, fluroescent, indancescent, and neon lamps, voltmeter
and power plugs to equipments. Turn all breakers and switches to their
ON positions except the lighting circuits and 120V A.C. bench recepta-
cle Close the shelter door so that the blackout switch is activated.
b. Apply 100V DC Min to 500V DC Max test voltage for a period
of ten (10) seconds between conductors and between each conductor and
ground. The leakage resistance shall be no less than 50 megohms.
c. After test return all switches and breakers to their OFF po-
sitions and restore all resistive and inductive loads.
4.6.2 Test of lighting, circuit breaker #1 and door interlock
switch. (AN/ASM-146 & AN/ASM-147).
a. Check power entrance box for proper power connection.
Switch on main breaker. Voltmeter inside shelter should read input volts
(approx. 120 VAC), and the neon light over the doorway should be on.
b. Switch on all the auxiliary breakers. Turn on the blackout
by-pass switch and light #1 switch. Observe that half of the ceiling
lights are illuminated.
Observe that all the remaining
c. Turn on light #2 switch.
ceiling lights are illuminated.
d. Turn off the blackout by-pass switch, with the shelter door
opened, observe that all the lamps extinguish, and the neon light re-
main lit.
e. Close shelter door and turn latch to locked position. Ob-
serve that the door interlock switch causes all lamps to light again,
f. Unlatch and reopen door. The lamps extinguish once more as
the latch is turned, but the neon lamp remains lit.
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