Fundamentals in selecting Wire Sizes in Aerospace Applications

Standard:
Issuing:
Scope:

The scope of this report is to capture the fundamental principles of selecting a wire size for an aerospace application using the method prescribed in SAE AS50881 standard. Also, provided in this report are additional calculations to ensure the wire selection will adequately perform in a particular design function including meeting environment constraints. Some of the calculations in this report have been simplified to demonstrate the process for validating the wire size selections for a particular design application. More precise calculations should be investigated and evaluated to ensure proper assessment of each individual calculation in this report.

Rationale:

The selection of aerospace wire sizes per SAE AS50881 is a straight forward process to complete. For electrical power feeders and power distribution applications, additional information, as well as environmental and installation constraints, are required to properly evaluate the correct wire size selected for its particular design requirements.

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