Size equipment grounding conductors per NEC Table 250.122.
Based on NEC Table 250.122
Grounding Electrode Conductor
8 AWG
CopperBased on:
4 AWG or smaller
Note:
For service entrances. See NEC Table 250.66 for specific applications and exceptions.
NEC Table 250.66 sizing applies to grounding electrode conductors for AC systems.
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For Reference Only: This calculator is provided for educational and informational purposes only. It is not intended to be a substitute for professional engineering design, advice, or certification.
Code Compliance: Calculations are based on the 2023 National Electrical Code (NEC®). However, local codes, amendments, and Authority Having Jurisdiction (AHJ) requirements vary by location and may supersede standard NEC requirements.
Verify with Your AHJ: Local Authority Having Jurisdiction (AHJ) requirements take precedence over all general code references. Contact your local building department or electrical inspector to confirm applicable codes, amendments, and permit requirements before beginning any electrical work.
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NEC Reference: NEC Table 250.122
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