Electrical Wiring Interconnect System


T he main passenger cabin, crew and galley areas are housed in the fuselage mid-wing. This pressurized zone is characterized by moderate environmental stress factors such as fluid condensation, humidity, temperatures in the -65° to +95°C range, and moderate dynamic vibration. The electrical wiring interconnect system utilizes mostly conventional interconnect technology, with an emphasis on general weight reduction, reliability, and speed-of-assembly. Production breaks are a significant challenge for the EWIS engineer, with cost control of interconnect interfaces a principal design requirement. The pressurized interface between the mid-wing fuselage and the wings requires careful attention in the specification and use of pressure bulkhead feedthrus. barrel section (pressurized passenger / crew cabin) Fuselage Mid-Wing Forward barrel section plus center section and aft-of-wing

Glenair SpliceSaver™ „„ Crimp wire termination solution saves time and labor over manual DO150 splicing „„ Ideally suited for crown and floor wiring in Zone 1 „„ Three versions: single- piece, Spiralock®, and bussed „„ Features Stinger™ crimp contact technology with integrated retention mechanism „„ Small form-factor and lightweight composite „„ Supports 1–3 wire terminations

Zone 1 Application Guidelines

Environmental Stress Factors

Applicable RTCA/DO-160 Requirements


DO-160 Category S and H (Table 8-1) DO-160 Category A, Test Procedure 1


Ground Survival Temperature

-65° to 95°C; DO-160 Category A3 (Table 4-1) Sea level to 10kft; DO-160 Category A3 (Table 4-1)

Pressure Differential

-55° to 85°C; DO-160 category A3 (Table 4-1) with Temperature change rate per DO-160 Category A (10 C min per minute) Exposure to humidity and condensation; DO-160 Category B

Operating Temperature



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