Engineering tools
Explore electrical sizing and harness layout with these interactive calculators. Use your circuit and bundle information to explore preliminary design options.
Electrical sizing
Start with the wire-size selector, or assess current capacity and voltage drop separately.
Wire-Size Selector
Compare wire sizes against estimated ampacity and maximum allowable resistive voltage drop.
Open tool →Bundle Ampacity Calculator
Estimate current capacity using wire size, bundle loading, temperature, and installation conditions.
Open tool →Voltage Drop Calculator
Estimate voltage drop, voltage at the load, and wiring losses using circuit current, wire lengths, and conductor resistance.
Open tool →Harness layout
Estimate bundle diameter first, then carry the result into bend-radius and conduit-sizing calculations.
Bundle Diameter Estimator
Enter wire quantities and outside diameters to estimate bundle diameter and a planning range.
Open tool →Bend Radius Calculator
Use wire, cable, or bundle dimensions to estimate bend-radius requirements for the selected installation category.
Open tool →Conduit Sizing Calculator
Use bundle diameter to estimate the minimum conduit inside diameter and check available conduit sizes.
Open tool →The ampacity and wire-size estimates assume simplified wire construction, bundling, installation environments, and constant loading. For more complex systems and loading profiles, contact Lectromec to learn about our advanced ampacity thermal models.
For informational purposes only. Results are estimates and do not establish design suitability or compliance. Qualified engineering personnel must review applicable standards, aircraft and equipment requirements, manufacturer specifications, installation conditions, and the complete engineering design before use.