MV · Medium voltage
The utility-to-facility distribution voltage class feeding site transformers and switchgear; the level where lead times, arc-flash energy, and gear cost step up sharply.
Current numbers
NEC 2029 (partial, forecast); UL certification pathway openNEC 2029 expected to add partial 800 VDC provisions (SemiAnalysis); UL opened an MV SST certification program in September 2026
4 → 3 functional blocksillustrative AC → integrated MV/DC functional-block count, including final DC conversion