WireGaugeCalc Free calculator · NEC cited · works offline
10 Gauge Aluminum Wire Amp Rating
10 gauge aluminum wire amp rating is quick with WireGaugeCalc, since you pick the conductor and the tool reads the matching NEC 310.16 column.
It shows the 60C, 75C, and 90C values for 10 AWG aluminum so you can match the rating to your equipment terminations.
So you size to the correct column instead of guessing the wire's capacity.
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 by Termination Temperature
Aluminum 10 AWG carries less than copper of the same size, so the tool pulls its dedicated NEC 310.16 row.
Since most terminations are rated 75C, the calculator highlights that column while still showing 60C and 90C.
It uses the lowest-rated part in the circuit to set the usable ampacity, so a 60C device caps the rating even on a 90C conductor.
What Sets the 10 AWG Aluminum Rating
A few choices decide which ampacity figure applies:
- Conductor material, aluminum
- Size, 10 AWG
- Termination temperature, 60C, 75C, or 90C
- Equipment and lug ratings on both ends
- Any ambient or bundling derate that lowers it
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
What is the amp rating of 10 gauge aluminum wire?
10 AWG aluminum is rated 30A at 60C, 35A at 75C, and 40A at 90C per NEC 310.16, but the usable value is capped by the lowest termination rating in the circuit. Verify against the current NEC and your local authority having jurisdiction.
Why is aluminum 10 AWG rated lower than copper 10 AWG?
Aluminum has higher resistance and carries less current for the same size, so the NEC lists it in a separate column with smaller ampacity values.
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.