TIA-942
A telecom-industry standard for data-center infrastructure with its own Rated 1-4 reliability classification.
Current numbers
May 2024TIA-942-C: AI growth and sustainability; Rated-1..4 naming dates to the 2014 TIA/Uptime separation
Rated 1–4TIA-942-C resilience scale; full-facility telecom + M&E standard, May 2024 (C) revision