Commissioning · Cx
The structured testing (levels L1-L5) that proves a facility works correctly under load before it goes live.
Current numbers
G0-2019 / G1.1-2025 / Std 202-2024; G1.6P in first public review (Oct 2026)Published ASHRAE commissioning references and the data-center guideline now in public review; freeze the editions you adopt
Sept 2025NERC Level 2 Industry Recommendation on large-load interconnection, studies, commissioning and operations
L1–L5Electrical commissioning level taxonomy, from factory test to integrated systems test