Southwire Voltage Drop
4.2star
212 reviews
100K+
Downloads
Everyone
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About this app
Southwire's voltage drop calculator will help you determine the proper wire size for an electrical circuit based on the voltage drop and current carrying capacity of an electrical circuit. Determines wire size to meet specific voltage drop limits or calculates voltage drop for a specific conductor run. When sizing conductors, calculations limits wire size to voltage drop and NEC ampacity. Southwire's Voltage Drop Calculator is designed for applications using AWG and KCMIL sizes only.
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Ratings and reviews
4.2
205 reviews
Bradley Fisk
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April 30, 2021
Excellent app for a construction electrician, or maintenance electrician who does rewiring jobs. Multiple options, first you have to learn how to calculate several wires of different sizes in one conduit, but after you do it is intuitive and just a great program
11 people found this review helpful
A Google user
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March 12, 2020
Spot on, except I wish the app gave an option to select insulation classes of conductors. Instead, it defaults to 60c insulation which is strange being that 75c is a typical spec. Just know your ampacity ratings of conductors, and base your selection off of the voltage drop. Ie... size 3 in the app is rated for 85A(60c), but I'm running size 3 THHN(90c) which is good for 115A.
12 people found this review helpful
Joseph Lawhorne
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July 18, 2022
Works well for the awg listed, but it doesn't go small enough. Should go down to 18 awg at least. Also, it would be nice to have a separate table showing max amps on a specific awg wire, so I know I can't use 12 awg at all, if I need 40 amps; It just doesn't work.
4 people found this review helpful
What's new
Behind the scenes improvements.
