WireGaugeCalc Free calculator · NEC cited · works offline
Single Phase 10hp Motor Amps
Single phase 10hp motor amps is fast with WireGaugeCalc, which reads full load current from NEC Table 430.248.
It returns the amps for a 10 horsepower single-phase motor at the voltage you pick, so conductor sizing starts from a code value.
You get the number and the matching wire size without flipping through the table by hand.
Open the calculatorEnter any two values and read the rest.
Ohm’s law: V = I × R and P = V × I. Field aid only, verify against the current NEC and your local authority having jurisdiction.
Full Load Amps For Single Phase Motors
A 10 horsepower single-phase motor at 230 volts draws 50 amps full load per NEC Table 430.248.
The app uses the table value since single-phase FLA runs much higher than the three-phase equivalent.
It can also read larger ratings, so checking a 75 hp electric motor amps value on a three-phase service takes one tap.
Carrying The Amps Into The Circuit
After the full load amps, the app sizes the rest of the single-phase motor circuit:
- Full load amps of 50 A for 10 HP single-phase at 230V
- Branch conductors at 125% of FLA per NEC 430.22
- Overload set between 115% and 125% of FLA
- Breaker or fuse ceiling from NEC Table 430.52
- Voltage swap between 115V and 230V for comparison
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
Why is single-phase FLA so much higher than three-phase?
Single-phase power lacks the square-root-of-three factor that three-phase delivers, so the same horsepower pulls more current on one phase. That is why a 10 HP single-phase motor reads near 50 A while three-phase reads far less.
Can I use the table value to set the overload?
Size conductors from the table full load amps, but set the overload relay from the motor nameplate amps per NEC 430.32. Confirm the values against the current NEC and your local authority having jurisdiction.
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.