WireGaugeCalc Free calculator · NEC cited · works offline
#2 Aluminum Wire Amps
#2 aluminum wire amps are quick to confirm with WireGaugeCalc, since you pick the conductor and it returns the rating from the NEC ampacity tables.
The calculator reads NEC 310.16, so it shows the amperage at the 60, 75, and 90 degree C columns for aluminum.
You see the ampacity in seconds, so you can size or verify a #2 aluminum run without reading the table by hand.
Open the calculatorAllowable ampacity from NEC Table 310.16 at the chosen termination temperature. Field aid only, verify against the current NEC and your local authority having jurisdiction.
Reading the Ampacity Columns
Aluminum carries fewer amps than copper at the same gauge, so the calculator shows the aluminum value directly.
It lists the 60, 75, and 90 degree C ratings, since the column you use depends on the terminations.
The tool defaults to the 75 degree C column most lugs use, so the rating you read is the one that applies on the job.
What WireGaugeCalc Shows for #2 Aluminum
The calculator pulls the conductor data you need:
- Reads ampacity from NEC 310.16 for #2 aluminum
- Shows the 60, 75, and 90 degree C columns
- Defaults to the 75 degree C termination rating
- Compares the aluminum value against copper
- Notes when derating lowers the usable amperage
One app for every NEC calculation
WireGaugeCalc keeps the calculations you reach for most in one place:
- Voltage drop and wire sizing for any run
- Conduit fill for EMT, PVC, and RMC
- Box fill and junction box sizing
- Ampacity and temperature derating
- Motor circuit and load calculations
- Conduit bend offsets and saddles
Built for the field, works offline
The whole app runs on your phone, so it keeps working in a basement, an attic, or a job site with no signal.
There is no account to create and nothing to load. Open it, run the number, and get back to work.
- No signup and no signal needed
- Answers in a tap, not a spreadsheet
- Same tool on phone, tablet, and desktop
Every result cites the NEC article
Each answer shows the table or formula it came from, so you can check the method and learn the code as you go.
That makes the app useful on the job and during exam prep, since the reasoning is right next to the number.
Switch the code year your job runs on
Jurisdictions adopt the NEC at different times, so you can match the calculation to the code in force:
- NEC 2017, 2020, and 2023 tables
- Copper and aluminum conductors
- 60, 75, and 90 degree C terminations
- Single-phase and three-phase systems
Run the number, then get back to work
Stop flipping through a paper book or hopping between calculator sites. Enter your values, read the code-cited answer, and move on. Free to use, no signup.
Open the calculatorFrequently asked questions
How many amps does #2 aluminum wire carry?
#2 aluminum carries 90 amps at the 75 degree C column under NEC 310.16. Verify the rating against the current NEC and your local authority having jurisdiction, since derating and conduit conditions can lower it.
Can #2 aluminum feed a 100 amp circuit?
Not at the 75 degree C column, since 90 amps falls short of 100, so a larger gauge is needed there. The calculator shows the next size up when the rating does not meet the load.
Is WireGaugeCalc free to use?
Yes. Every calculator is free to run with no signup. A paid tier adds saved projects, PDF reports, and extra code years, but the core math stays free.
Does it work without internet?
Yes. The app runs on your device, so it keeps working with no signal on a job site, in a basement, or in an attic.
Are the results code accurate?
Results follow published NEC tables and standard formulas, and each answer shows the article it came from. It is a field aid, not a stamp of approval, so verify against the current code and your local authority before you wire anything.
Which NEC code year does it use?
You can switch between NEC 2017, 2020, and 2023, since jurisdictions adopt the code at different times. Pick the year your job runs on.