MIL-DTL-62548C(AT)
3.2.2 Wire. The ignition lead wire shall be number 16 American Wire Gage (AWG)
minimum (see 4.2.3).
3.3 Operating requirements. The ignition lead shall provide the following functional,
operational, and performance capabilities.
3.3.1 Nuclear control. The ignition lead shall have optimum protection against
electromagnetic impulse (EMP) and transient radiation effects. There shall be at least 2 layers of
copperweld shielding or an equivalent shielding material (see 4.2.4.1).
3.3.2 Insulation resistance. The ignition lead insulation resistance between conductor
and the cable shield shall be a minimum of 100 megohms at 500 ± 10 volts (V) direct current
(dc) (see 4.2.4.2).
3.3.3 Maximum voltage. The ignition lead insulation shall show no evidence of
breakdown when subjected to 20 kilovolts (kV) root mean square (rms) voltage between the
conductor and the cable shield for a 5 to 10 second duration (see 4.2.4.3).
3.3.4 Accelerated aging. The ignition lead insulation shall withstand a temperature of
392 degrees Fahrenheit (°F) (200 degrees Celsius (°C)) for a minimum of 168 hours and
continue to meet the requirements of 3.3.2 and 3.3.3 without degradation in performance
(see 4.2.4.4).
3.3.5 Nuclear hardening. The ignition lead shall withstand a nuclear threat environment
as defined in "Nuclear Hardening Criteria," document control number LS199000006173
(see 4.2.4.5).
3.4 Interface requirements. The lead ignition shall accommodate the following inputs
and interfaces.
3.4.1 Electromagnetic interference (EMI). The ignition lead shall meet the requirements
of MIL-STD-461, or an equivalent, on a component level as part of the engine electronic control
system (see 4.2.5.1).
3.5 Support and ownership requirements. The ignition lead shall meet the following
logistics requirements.
3.5.1 Identification marking. The ignition lead shall be permanently marked and
identified in accordance with Drawing 12286829 and MIL-STD-130, or equivalent (see 4.2.6.1).
3.5.2 Interchangeability. The ignition lead shall be interchangeable with other parts
having identical part number (see 4.2.6.2).
3.5.3 Safety. The lead ignition shall pose no hazards, physically or electrically, to
operating personnel (see 4.2.6.3).
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