# Southwire Voltage Drop

> Southwire Voltage Drop determines proper wire size for an electrical circuit.

Canonical page: [https://chrome-stats.com/d/com.southwire.voltageDrop](https://chrome-stats.com/d/com.southwire.voltageDrop)

## Overview

- **ID:** `com.southwire.voltageDrop`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** Southwire Company
- **Category:** TOOLS
- **Downloads:** 146,834
- **Rating:** 4.30 / 5 (260 ratings)
- **Version:** 3.2.5
- **Last updated:** 2026-08-24
- **First published:** 2014-09-26
- **Publisher country:** US
- **Size:** 4.77 MB
- **Data as of:** 2026-09-08
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.southwire.voltageDrop)
- **Website:** [http://www.southwire.com/apps](http://www.southwire.com/apps)
- **Privacy policy:** [http://www.southwire.com/support/privacy-policy-mobile-and-apps.htm](http://www.southwire.com/support/privacy-policy-mobile-and-apps.htm)

## Description

Southwire Voltage Drop Calculator is an essential Chrome extension for electricians and engineers, helping to determine the appropriate wire size for electrical circuits. It calculates wire sizes based on voltage drop limits and NEC ampacity to ensure safety and efficiency. Users can input current carrying capacity and conductor run specifics, selecting from AWG and KCMIL wire sizes.

This extension simplifies complex electrical calculations, enabling professionals to meet regulatory standards and design requirements quickly. Whether you need to limit voltage drop or verify wire sizing, Southwire Voltage Drop provides accurate results within seconds, streamlining the circuit planning process.

## Rankings

- #184,406 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_ADSERVICES_AD_ID`
- `android.permission.ACCESS_ADSERVICES_ATTRIBUTION`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.INTERNET`
- `android.permission.VIBRATE`
- `android.permission.WAKE_LOCK`
- `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE`
- `com.google.android.providers.gsf.permission.READ_GSERVICES`
- `com.southwire.voltageDrop.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`

## Review summary

Users praise the app as a very useful, accurate, and fast voltage-drop calculator that’s easy to use and handy for on-site verification. It helps explain results to clients and supports AC/DC work. Recurrent drawbacks include UI/UX problems with the agree button, poor screen scaling on phones, feature gaps like no 3-phase mode and no 16 AWG option, and concerns about cloning/licensing. Overall it’s a valuable tool when interface and feature gaps are addressed.

### Pros

- Very useful and accurate voltage drop/design tool
- Easy to use with a clean, to-the-point interface
- Handy on-site tool that helps verify conductor performance and explain results to clients
- Fast performance and versatile for AC and DC work
- Reduces guessing and provides quick, reliable numbers for quick decisions

### Cons

- Agree/acceptance button placement blocks access to the app (UI issue)
- App appears to be a clone and raises licensing concerns
- Doesn't fit or scale well on phone screens (UI responsiveness)
- Lacks 3-phase calculation capability
- Missing 16 AWG option

## Similar extensions and apps

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- [Southwire® Conversion Calc](https://chrome-stats.com/d/com.southwire.conversion) — 8,960 users, 4.67 / 5
- [Voltage Drop Calculator](https://chrome-stats.com/d/com.sis.voltagedropcalculator) — 102,222 users, 4.58 / 5
- [Wire Size Calculator](https://chrome-stats.com/d/com.bariskode.wire_size_calculator) — 8,883 users
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- [Calculate wire size and more](https://chrome-stats.com/d/awg.calculator.pro) — 329 users
- [Voltage Drop Calculator Pro](https://chrome-stats.com/d/com.sis.vdcalcpro) — 819 users, 5.00 / 5
- [DC Wire Size & Fuse Calculator](https://chrome-stats.com/d/com.guizeapps.dcwire) — 62 users
- [Voltage Drop Calculator](https://chrome-stats.com/d/com.sherifshaaban.voltagedropcalculator) — 552 users

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Source: [Chrome-Stats](https://chrome-stats.com/d/com.southwire.voltageDrop)