Reference tables and custom data

The Settings > Reference Tables page is currently a read-only browser for the NEC 2026 reference data available to EKX. Use the category list and search box to inspect the values used by sizing calculations.

EKX does not currently provide controls on this page to create, edit, or delete organization or user table overrides. Do not treat the displayed JSON as an editable project setting.

How table data affects sizing

Each calculation resolves one complete row for every table key. When an approved organization or user override exists in the database, the more specific row replaces the system row for that key; EKX does not merge partial JSON objects with the system row.

Sizing evidence records the effective table-basis hash. When a calculation uses custom table data, its cited table sources and caveats identify that data as custom rather than published NEC data.

Current limitations

• The application UI cannot author or manage custom table rows.
• A custom row must contain the complete validated structure expected for its

table key.

• Custom rows remain within the project's selected electrical-code profile.

They cannot implement CEC, IEC, another NEC edition, or a local code by themselves.

• Cable-tray factors are currently implemented as NEC 2026 rules, not editable

reference-table data.

If your organization needs controlled custom reference data, contact EKX support with the table, engineering basis, approval owner, and required scope. Confirm local amendments and acceptance with the authority having jurisdiction (AHJ) before relying on altered values.