Wire (AWG) Calculator

Wire (AWG) Calculator

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This app is designed to assist the Aviation Maintenance Airframe and Powerplant (A&P) mechanic in determining the correct American Wire Gauge (AWG) wire size for given conditions, according to procedures outlined in FAA Publication AC 43-13 1B (Acceptable Methods, Techniques, and Practices - Aircraft Inspection and Repair), Chapter 11. 

  • Features

    Conditions include circuit length, current, voltage, wire temperature (known or estimated) and derating factors for both altitude and wire bundle size/loading percentage.
    The app also contains utilities that enable the aircraft mechanic to determine the following parameters without hands-on use of the AC 43-13 (when field/shop conditions make it impractical). Figures are referenced:


    - Maximum Wire Length (standard temperature). 
    -- Input parameters: circuit voltage, current, current flow and AWG. 
    -- Output: L1.

    -- Ref: AC 43-13 1B, Fig 11-2/3 


    - Maximum Current (standard temperature). 
    -- Input parameters: circuit voltage, current flow, wire length and AWG. 
    -- Output: Max Current.

    -- Ref: AC 43-13 1B, Fig 11-2/3 


    - Altitude Deration Factor. 
    -- Input parameter: Max Altitude. 
    -- Output: Altitude Deration Factor.
    -- Ref: AC 43-13 1B, Fig 11-5


    - Bundle Deration Factor. 
    -- Input parameters: Wire Count and Loading Percentage 
    -- Output: Bundle Deration Factor.
    -- Ref: AC 43-13 1B, Fig 11-6


    - IMAX (elevated temperature). 
    -- Input parameters: ambient temperature, conductor temperature rating and AWG. 
    -- Output: IMAX.
    -- Ref: AC 43-13 1B, Fig 11-4a/b


    When a chart does depict data due to input/output parameters exceeding chart limits, data is extrapolated and an appropriate warning ("** extrapolated data") is shown.




    The user of AWG CALCULATOR for any specific application without an independent verification of its accuracy does so at his/her own risk and assumes any and all liability resulting from such use. No warranty is offered as to the accuracy of results. Users should have a thorough understanding of the relevant theoretical criteria. 


    AWG Calculator
    Copyright 2020