MIL-PRF-11021H
resistor) until the circuit opens. There shall be no electrical contact with the switch assembly
case (see 4.6.11).
3.4.12 Switch lever torque. The torque required to operate the switch levers shall be
0.70 + 0.15 pound-force foot (lbf-ft) (0.95 + 0.20 N-m) (see 4.6.12).
3.4.13 Interlock strength. The main switch lever with the mechanical interlock in the
lock position shall withstand 3.0 lbf-ft (4.1 N-m) of torque without operating the switch (i.e.,
only the circuits specified for the tested index position shall have power delivered to them) or
damage to the switch assembly (see 4.6.13).
3.4.14 Interlock effort. While 0.70 + 0.15 lbf-ft of torque is applied to the switch
assembly's interlock lever, the application of the same amount of torque to the main switch lever
shall cause the main switch lever to rotate (see 4.6.14).
3.4.15 Endurance. The switch assembly shall show no evidence of mechanical or
electrical failure during or following 50,000 cycles of operation while connected to each of the
circuits energized as specified in TABLE IV. Switch contacts and sockets shall withstand current
loads during switching and breaking sequences. The values of the parameters measured after
endurance testing shall not differ by more than 20% from those measured prior to beginning the
test (see 4.6.15). Subsequently, the switch assemblies shall comply with 3.4.1, 3.4.2, 3.4.13, and
3.5.1. Any deviation from normal operation, even an intermittent anomaly, such that the switch
eventually returns to normal operation, shall be recognized as a failure and shall be cause for
rejection.
3.4.16 Dielectric strength. The insulation shall resist the application of 1000 volts root
mean square (RMS) at 60 cycles per second (cps) without charring, cracking, arcing, rupturing,
or other damage (see 4.6.16).
3.4.17 Switch lever position. When the switch levers are indexed as specified (see 3.3.6
and 3.4.10) at each of the switch index positions, the switch levers shall align within 5 degrees of
the index mark (see 4.6.17).
3.4.18 Switch lever indexing. The switch assembly levers shall positively index
themselves when rotated through all the specified positions. Upon application of 0.10 + 0.01 lbf-
ft (0.14 + 0.014 N-m) of torque, the switch lever shall not move more than 5 degrees and the
switch assembly shall meet the requirements of 3.4.1 and 3.4.2 (see 4.6.18).
3.4.19 Crimp terminations. Crimp terminations used internally within the switch
assembly, as applicable, shall meet the performance requirements specified by 3.4.19.1 through
3.4.19.5 (see 4.6.19).
3.4.19.1 Voltage drop. The crimp termination voltage drop shall be less than 6 mV
before the test, and shall be less than 11 mV after the test, as specified in TABLE II (see
4.6.19.1) for 14 AWG conductors.
7
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