WireGaugeCalc Free calculator · NEC cited · works offline
Size Of Cable For 175 Amp
Size of cable for 175 amp loads is fast with WireGaugeCalc, since the calculator runs on this page.
You enter 175 amps, pick copper or aluminum, and choose the termination temperature column to get the cable size.
That means you can match the conductor to a 175A breaker or load without reading the table by hand.
Open the calculatorSmallest conductor whose ampacity meets the load, NEC Table 310.16. Field aid only, verify against the current NEC and your local authority having jurisdiction.
Matching cable ampacity to 175 amps
A 175A circuit needs a conductor whose ampacity meets or exceeds 175A, so the size depends on the material.
WireGaugeCalc uses NEC 310.16 and the column you pick to return the matching AWG or kcmil.
Since 175A falls between standard breaker steps, the tool helps you confirm the right cable.
Copper vs aluminum at 175 amps
The result depends on what you enter:
- 175A breaker or load current
- Copper or aluminum conductor
- 60C, 75C, or 90C termination column
- Continuous load adjustment if needed
- Cable size returned in AWG or kcmil
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 copper size carries 175 amps?
At the 75C column, 2/0 copper is rated for 175A under NEC 310.16. Confirm the termination rating on your equipment and verify against the current NEC and your local authority having jurisdiction.
Does a 175 amp breaker change the cable size?
The conductor must be protected by the breaker and carry the load, so the ampacity has to reach 175A. The calculator returns the smallest cable that meets that rating for your material and column.
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.