Equipment Grounding Conductor Size Chart
Common equipment grounding conductor sizes by breaker rating, with the voltage-drop upsize caveat.
- Source
- Table 250.122
- Edition
- 2023
- Updated
- 2026-07-27
- Scope
- United States
Lookup Table
What size EGC is tied to this overcurrent device?
| OCPD rating | Copper EGC | Aluminum EGC | Note |
|---|---|---|---|
| 15 A | 14 AWG | 12 AWG | Common branch circuit |
| 20 A | 12 AWG | 10 AWG | Common branch circuit |
| 60 A | 10 AWG | 8 AWG | Feeder range |
| 100 A | 8 AWG | 6 AWG | Feeder range |
| 200 A | 6 AWG | 4 AWG | Service and feeder checks differ |
Calculated against the NEC 2023 edition using 250.122. Confirm the edition adopted by your AHJ, which may differ and may carry local amendments.
Not covered by this tool
- Local amendments and equipment markings can be stricter than this reference view.
- Marginal values should be checked directly against the adopted edition.
- This page is a routing aid and does not replace the owning calculator for project-specific inputs.
Data last verified