# NFPA: NFPA 70, National Electrical Code

> Publisher page for the installation code carrying field marking requirements. Adoption, edition and local amendments vary by jurisdiction; confirm what your project has adopted rather than assuming the latest edition. Checked September 12, 2026.

Canonical page: https://datacenterlabeling.com/references/s50

Original source: [NFPA: NFPA 70, National Electrical Code](https://www.nfpa.org/product/nfpa-70-standard/p0070code)

## Scope of this source

Publisher page for the installation code carrying field marking requirements. Adoption, edition and local amendments vary by jurisdiction; confirm what your project has adopted rather than assuming the latest edition. Checked September 12, 2026.

Establishes the publisher and identity of the installation code. Clause-level marking requirements are in the purchased document and are not reproduced here.

Rackstamp provides editorial field guidance. IDs, cases, and worksheet entries are fictional examples unless identified otherwise. Distinguish local conventions from adopted standards. Source notes describe the evidence scope; a linked overview is not the full standard or a project approval.

## Related guidance

- [Check arc flash and electrical safety labels against their source](https://datacenterlabeling.com/guides/arc-flash-and-electrical-safety-labels)