How Conductor Resistance Affects Losses
Quand cela s’applique
Use this guide to connect conductor geometry and temperature to resistance, voltage drop, and loss awareness during early electrical design work.
Outil à utiliser
Calculer la resistance DC d'un conducteur selon longueur, section, materiau et temperature.
Ouvrir Calculateur de resistance de conducteur →Étapes
- 1Start with conductor length, cross-sectional area, material, and temperature basis.
- 2Compute resistance for the conductor path you are assessing.
- 3Use that resistance in downstream voltage-drop or loss calculations.
- 4Check how temperature and smaller cross-section assumptions change the result.
- 5Move to code-based sizing, grouping, and thermal checks for final design.
Exemples
- Comparing copper and aluminum conductors for a feeder concept.
- Estimating whether a hotter conductor assumption materially increases losses.
Ce qu’il faut éviter
- Mixing mm^2 and m^2 in the same formula chain.
- Forgetting that temperature raises resistance.
- Treating resistance-only results as a full AC impedance study.
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FAQ
Does this replace ampacity calculations?
No. Resistance is only one part of conductor selection and does not replace code-based ampacity methods.
Why is temperature included?
Because conductor resistivity changes with temperature and that can materially affect losses and drop.