NEC 2026 Compatible

A 200A service entrance conductor for a residential dwelling is composed of 3/0 AWG copper conductors. What is the minimum size copper grounding electrode conductor required to a ground rod electrode, assuming the largest service-entrance conductor is 3/0 AWG copper?

Journeyman Level📋 NEC 250.66(A)Grounding Electrode Conductor Sizing
Circuit Diagram
Service Entrance — NEC Article 230 Utility XFMR 7200V:240V Service Drop (overhead) Weatherhead Clearances 230.24(B) 10ft min over sidewalk M Meter MAIN DISC 200A 230.70 SERVICE PANEL 120/240V 200A MLO GE Rod 250.52 Grade GEC 250.64
A

No. 4 AWG copper

B

No. 6 AWG copper

C

No. 2 AWG copper

D

No. 8 AWG copper

Explanation & Direct Citation

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