Commercial Single-Line Diagram: 34.5 kV Service to 480Y/277 V Panels

A single-line diagram from a 34.5 kV utility service through a main service switchgear and 34.5 kV-480Y/277 V transformer to lighting, HVAC, elevator, kitchen and IT room panels, with a 318.7 kVA, 383.3 A main sizing example.