Hospital essential electrical system single line diagram
This critical power single line diagram shows a hospital essential electrical system at 480Y/277V. A 13.2 kV utility service feeds the normal switchgear through a 2500 kVA transformer, while two 1000 kW generators connect to common paralleling gear. Separate automatic transfer switches serve the life-safety and equipment branches.
Open it in the AI editor with a prompt pre-filled — keep what works, change what doesn't.
Scenario
This diagram shows a hospital’s essential electrical system, where two generators support distinct life-safety and equipment branches after a utility failure.
Key decisions
- Paralleled generators: Two 1000 kW units feed common paralleling gear for source redundancy.
- Separate ATS branches: Life-safety and equipment loads transfer independently at their rated switches.
- Life-safety loads: Egress lighting and the fire pump stay on a dedicated branch.
- Clinical continuity: ICU and operating-room loads receive the equipment branch.
- Smoke control: A dedicated motor feeder preserves smoke-management capability.
When to reuse this
Use this for a hospital with generator-paralleling gear and branch separation. Detailed generator controls and branch-circuit schedules belong on companion drawings.
Frequently asked questions
Why are there two hospital transfer switches?
What does generator paralleling gear do?
Does this show all hospital branches?
Try the diagram makers.
Tweak it with chat, export PNG/SVG, or fork it for your own use case.