# 220 Volt Wire Size Calculator

The 220 volt wire size calculator will help you determine the appropriate electrical wire for your next house installation. Do you want to install a new bell, maybe a new water pump? Keep reading to find out how to size your cables.

## How to calculate the size of a 220 volt wire?

The following information is required before we start:

- Wire size material since it affects the electrical resistivity.
- Distance between your energy source and the equipment you want to energize.
- The amount of current your equipment needs.

Once we have it all, we will use the following formula:

where:

- $\%\text{drop}$ — Allowable voltage drop, in %.
- $V$ — Source voltage, measured in volts.
- $I$ — Maximum current running through the wire, measured in amps;
- $\varrho$ — Resistivity of the conductor material, measured in ohm meters;
- $L$ — Length of the wire, measured in meters; and
- $A$ — Cross-sectional area of the wire measured in square meters.

The result will be expressed in mm² (if using the metric system).

It is common for wires to indicate their size in AWG (American Wire Gauge) units. Our wire gauge calculator relates circular cross area in mm² to AWG, but do not worry; our 220-volt wire size calculator also provides results in AWG.

## How do you use this 220 volt wire size calculator?

- Verify your connection will be 220 volt alternate current.
- Choose your conductor material.
- Define the amount of current your equipment need. For example, a 1 HP pump connected to a 220 volts single phase will require 3.39 amperes.
- Finally, input the length of your cable (remember it's a one-way distance).

As a result, the 220-volt wire size calculator will indicate the cross area of the cable you need to install.

## Other useful tools like the 220 volt wire size calculator

Since you already know how to size a 220 volts wire, you can take a look at other calculators:

- Wire size calculator;
- DC wire size;
- 100 amp wire size;
- 12 volt wire size;
- Amp to wire size; and
- 24 volt wire size.

## FAQ

### What wire size should I use for a 20 amp 220 volt circuit?

10 AWG or 2.38 mm of wire diameter. Try our 220-volt wire size calculator or follow these steps:

- Multiply 20 amperes per two times cable distance and then by the material resistivity.
- Divide the result by the voltage drop. Here, you get the cross-section area which you can convert to AWG by using internet charts. For the calculation, we assume a maximum wire size length of 39 m (one-way).

### What size wire for 50 amp 220 volt circuit?

6 AWG. In our 220-volt wire size calculator:

- Make sure you are in AC single-phase mode.
- Add 50 amps in the Current section.
- Define the one-way distance of your wire, and you will get 6 AWG as a result. For the calculation, we assume a maximum wire size length of 46 m (one-way).