Published by Southwire Company on Jul 24, 2024

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Why should I report an Issue with Southwire Voltage Drop?

  1. AppContacter will directly Email your issue/feedback to an apps's customer service once you report an issue and with lots of issues reported, companies will definitely listen to you.
  2. Pulling issues faced by users like you is a good way to draw attention of Southwire Company to your problem using the strength of crowds.
  3. Importantly, customers can learn from other customers in case the issue is a common problem that has been solved before.
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About Southwire Voltage Drop

1. 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.

2. Determines wire size to meet specific voltage drop limits or calculates voltage drop for a specific conductor run.

3. When sizing conductors, calculations limits wire size to voltage drop and NEC ampacity.

4. Southwire's Voltage Drop Calculator is designed for applications using AWG and KCMIL sizes only.

Southwire Voltage Drop Customer Insights

1. 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.I don't know why the Southwire app calculates a different result than the Southwire website.

2. Fix and I will change my review, for voltage drop, ignoring wire size warnings, app works great.Some of the ampacity tables are incorrect.

3. 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 programWorks well for the awg listed, but it doesn't go small enough.

4. And will not calculate wire sizes smaller than 14 AWG; an option to just type in the Cmil area would be nice.Good tool.

5. over and back.Great App Bad Advice, I know you sell wire, but intentionally misinforming users about Table 310.15(B)(16) in the NEC isn't okay.

6. Ie... size 3 in the app is rated for 85A(60c), but I'm running size 3 THHN(90c) which is good for 115A.Very useful tool, especially when vetting out possible installs with customer during conversations.

7. Would be great otherwise.Spot on, except I wish the app gave an option to select insulation classes of conductors.

8. Your not being conservative your intentionally misleading to sell larger wire.

9. Love it! - John (GF) EC ElectricSome of the information takes up more than 1 line, instead of making the space bigger the app appears to cut of some information.

10. Which one is right? Try, 60amp,copper, 3-phz, 60Hz,208v, conduit, 150ft run, min conductor and 3% allowable v-drop.

11. Just know your ampacity ratings of conductors, and base your selection off of the voltage drop.

Steps to Troubleshoot & Fix Southwire Voltage Drop Issues

1. Fix Southwire Voltage Drop Not Working/Crashes/Errors/Unresponsive & Black/White screen:


  1. Restart Southwire Voltage Drop: Restarting the app will resolve most errors.
  2. Update the Southwire Voltage Drop App. Here is how:
    1. On Android goto PlayStore » Search for "Southwire Voltage Drop" » Open Southwire Voltage Drop » click "Update".
    2. On iPhone, goto AppStore » Your profile » Available Updates » Check for Southwire Voltage Drop » click "UPDATE".
  3. Clear Southwire Voltage Drop app cache: Clearing cached data will force your app to retrieve the latest data directly from Southwire Voltage Drop servers.
    1. On Android, goto Settings » Apps » Select "Southwire Voltage Drop" » click Storage » click "Clear Cache".
  4. Check Southwire Voltage Drop app permissions. If any of these permissions required to use your device's features are disenabled, Southwire Voltage Drop might not work.
  5. Uninstall and reinstall Southwire Voltage Drop. If nothing else has worked, completely uninstall Southwire Voltage Drop then reinstall.
  6. Restart your device. Last, restarting your device can often clear most problems causing Southwire Voltage Drop not working


2. Fix Southwire Voltage Drop Server issues & Internet Connection


  1. Check network connection: An unstable Internet will make Southwire Voltage Drop be unable to connect to it's servers. Ensure your wi-fi is working then restart app.
  2. Disable VPN: VPN can cause connection errors and lead to Southwire Voltage Drop not working. Make sure all VPNs are off
  3. Enable background data: When Background data is turned off, Southwire Voltage Drop may not be able to connect to the Internet when running in the background.

Reported Issues