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Southwire® Voltage Drop Calc Screenshots

iPad

iPhone

About Southwire® Voltage Drop Calc

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.

What's New in the Latest Version 3.1.4

Last updated on Aug 3, 2023

Old Versions

Behind the scenes improvements.

Version History

3.1.4

Aug 3, 2023

Behind the scenes improvements.

3.1.3

Nov 18, 2020

New widget to display last calculation results.

3.1.2

Oct 8, 2020

Minor bug fixes.

3.1.1

Sep 17, 2020

Fixes crash in More section.

3.1.0

Aug 27, 2020

Residential mode will no longer compute a result recommending parallels.

3.0.3

Apr 23, 2020

Minor bug fixes.

3.0.2

Apr 9, 2020

Added drop down for predefined voltage values.

3.0.1

Mar 12, 2020

Minor content fixes.

3.0

Feb 21, 2020

New 3.0 version has the following changes from the previously released version:
- Commercial & residential modes
- Parallels
- Straight voltage drop calculation (in addition to minimum conductor size and maximum circuit distance calculations)
- Power Factor input
- DC current option

2.1.6

Dec 8, 2018

- Removed link to the SIMpull 600V Calculator on the More screen

2.1.5

May 10, 2018

- Extended results are modified to have more specific information
- Pop up has been added to get attention of the user whenever there is a warning on conductor sizes

2.1.4

Mar 23, 2018

- More descriptive labels for units selection.
- Default value for Max Voltage Drop set to 3%.
- Better definition for Parallels.
- Improved wording in Help & Feedback section.

2.1.3

Mar 2, 2018

Minor bug fix.

2.1.2

Feb 24, 2018

Reintroducing sets, and a few other minor improvements.

2.1.1

Feb 9, 2018

Bug fix.

2.1.0

Feb 2, 2018

- Removed No of Parallel runs.