Electrical Analysis Tools

Electrical analysis tools.




Wire Sizing ...

Ampacity and voltage drop tables

Ampacity table common gages and insulations...

Voltage drop for 12, 24, 48 and 120 volt systems...

The two main things in picking wire size are: 1) don't exceed the maximum current carrying (ampacity) of the wire, and 2) don't have an excessive voltage drop along the wire.

I find these two tables helpful in a lot of cases to check for ampacity and for voltage drop.

Good Voltage Drop Calculator from Calculator.net ...



voltage drop calculatorA good voltage drop calculator for any voltage DC or AC.

Also wire properties, resistance, ampacity table for copper wire.

Voltage Drop Calculator,
Nick Degaggis

Wire Size Calculator ...

Very handy wire size calculator.

It calculates the minimum wire size for 3% or less voltage drop.

Another good voltage drop calculator



Another very nice calculator.
Various wire sizing and maximum amperage tools, tables, calculators, and wire application data:

Another wire table for AWG that includes resistance per 100 ft and much more.
Wire Table            

 And another from Northern Arizona Wind & Sun

PV Array Sizing
PVWatts  -- A Performance Calculator for Grid-Connected PV Systems


This is a really useful tool.

An easy calculator you can use to find out how much power you will get from a PV installation in your area.

It calculates PV system performance based on hour by hour records for sun in your area.

Version 1 is very easy to use, and works worldwide.
Version 2 allows more detailed inputs, but seems rather complex and puzzling at times to me.

PV wiring recommended distances and currents chart.

PV Wire Chart


Recommended distances and currents for 2% voltage drop in low voltage PV circuits.
Electric Motor Tools


Approximate motor current draw at full load.