NEC 2023 Article 250 — Grounding and Bonding

Updated Apr 17, 2026

System and equipment grounding. Main bonding jumper in service panel. Separately derived systems need grounding electrode. Grounding electrode conductor sized per Table 250.66.

Common residential mistake: neutral-ground bond on subpanel. Must be bonded only at service equipment per 250.142.

category

Electrical — Grounding

code body

NEC

code year

2023

adopted by

["ca-la","ca-sf","ca-sd","az-phx","nv-lv"]

source url

https://www.nfpa.org/codes-and-standards/all-codes-and-standards/list-of-codes-and-standards/detail?code=70

SOURCES

🔗https://www.nfpa.org/codes-and-standards/all-codes-and-stand...

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