The stakes could not be higher. A failed start or an undersized set puts patients on ventilators, operating theatres and critical care at risk, and exposes your facility to regulatory action and liability.
Critical Power Lessons That Carry Across Sectors
USP&E designs, supplies and maintains mission-critical power for sites where an outage is not an option, and the same redundancy logic applies to hospitals and data centres. USP&E brings 150+ power projects in 45+ countries and 25,000 MW contracted since 2002, and our 400+ engineers and project managers can review your essential electrical system, size the generators and plan testing with your facilities team. We work under ISO 9001 and ISO 45001 certified systems with FCPA and OFAC controls. USP&E is a full-service EPC and O&M contractor, not a broker.
NFPA 110 Levels, Types and Classes
NFPA 110 classifies emergency power systems by level, type and class. Level 1 covers systems where failure could cause loss of life or serious injury, which includes hospital life-safety and critical loads. The type gives the maximum time to restore power; Type 10 means within 10 seconds. The class sets the minimum run time at rated load without refuelling.
NFPA 99 then divides the hospital’s essential electrical system into branches: life safety, critical and equipment. Each branch has its own transfer switch and priority, and you need to know where yours are. Your generator plant must carry all of them, with life safety and critical restored first. Always confirm which code editions your authority having jurisdiction enforces.
| Term | Meaning | Typical hospital requirement |
|---|---|---|
| Level 1 | Failure could endanger life | Life-safety and critical branches |
| Type 10 | Power restored within 10 seconds | Life-safety and critical loads |
| Class | Minimum run time without refuelling | Set by code and local risk |
| Branches (NFPA 99) | Life safety, critical, equipment | Separate transfer switches |
Sizing Hospital Generators
Size your plant from real load data, not the main breaker, and ask your clinical engineering team which equipment you cannot afford to lose even for seconds. Start with the connected load on each branch, apply realistic demand factors, then add the largest motor-starting step, such as chillers, fire pumps or air handling. Imaging equipment and large UPS systems add harmonic and transient demands that affect generator selection.
Leave room for growth. Your hospital will likely add beds, imaging suites and cooling over the life of your generator plant, so many designers reserve space and switchgear capacity for an additional unit. That choice costs little at the start and avoids a disruptive rebuild of the energy centre later.
A generator sizing chart gives a first estimate, but the final selection should check transient voltage dip and frequency recovery on the largest step, since sensitive medical equipment is less tolerant than most building loads. For a quick first estimate, use this independent generator size calculator.
Redundancy and Testing
Most hospitals, and probably yours, use N+1 generator plants, so the largest unit can fail or be in maintenance while the rest carry the essential load. Paralleling switchgear with load shedding keeps life-safety and critical branches online if capacity drops. Fuel storage, dual fuel supplies and maintenance bypass arrangements complete the design.
Testing proves it works. NFPA 110 calls for regular monthly exercise under load and periodic longer tests; your accreditation body will check the records. The redundancy USP&E designs for data centre power applies directly: concurrent maintainability, tested transfers and documented results.
This site’s O&M guide for mission-critical generator fleets covers ongoing testing and maintenance in more detail.
Planning a Larger Healthcare Campus
Large campuses with steady heating and cooling loads may justify on-site generation beyond emergency power, where natural gas engines/stations and gas turbine generators can supply combined heat and power, with diesel kept for Level 1 emergency loads. USP&E delivers used/new gas turbines and remanufactured GE Frame 6B units, and for US hyperscale campuses the New USP&E FX-45 45MW Modular Gas Turbine for the Hyperscale Data Center sector in the USA offers 2028–2030 slots, under hyperscale EPC/O&M for AI gas turbines, hyperscale generators and gas turbines for compute.
The same design discipline used for mission-critical data center campuses helps you plan a hospital plant that is safe to maintain and simple to test.
Global Offices Behind Your Mission-Critical Power Programme
Your team wants answers in its own time zone. USP&E’s offices in Colorado Springs (1755 Telstar Dr, Suite 300) and Knoxville (800 S Gay St, Suite 700) lead your mission-critical fuel gas specification conversations in the US, from the first data request to the site visit, so questions about fuel, interconnection and delivery are answered by people who can be on site.
The wider network carries the heavy lifting for fuel gas conditioning, Frame 6B units and gas turbine generators: London (162-168 Regent Street) for structuring and finance, Johannesburg (22 Kildoon Rd, Bryanston) for engineering and project controls, Cape Town (31 Brickfield Road, Woodstock) for design and commissioning support, and Wuxi, China (No. 1, Ningzhou Road, Wuxi) for China supply chain and manufacturing.
For healthcare clients, US teams review code compliance and site conditions in person, while Johannesburg engineering supports studies, protection settings and documentation. Regions served: USA | AFRICA | UK | UAE | CHINA. USP&E’s reach covers 150+ power projects in 45+ countries and 25,000 MW contracted since 2002, and the company is ISO 9001 and ISO 45001 certified.
Proof From USP&E Projects
These approved projects show USP&E delivering critical power where reliability is the whole point.
- USP&E has refurbished seven GE Frame 6B gas turbines to zero hours in-house for major US hyperscale data-centre developers.
- Resolute Mining, Syama, Mali: USP&E supplied, installed and operated a Caterpillar power station for the process plant and process water. Read the case study.
- Kinross Gold, Tasiast, Mauritania: USP&E supplied and installed a Caterpillar backup power station with new switchgear, on time and on budget. Read the case study.
How to Plan a Hospital Generator Plant
Your 3-step plan: 1. Share your branch loads and code requirements. 2. Get sizing, redundancy and testing proposals. 3. Install, commission and document.
- Collect connected load by branch: life safety, critical and equipment.
- Identify the largest motor-starting and UPS steps.
- Size the generators with N+1 redundancy and transient checks.
- Design paralleling, load shedding and transfer switches by branch.
- Commission with witnessed tests and set up the monthly testing record.
FAQ: Hospital Generators
Which USP&E offices support hospital generator projects?
USP&E supports US hospital projects from Colorado Springs and Knoxville, where teams can review sites and code requirements in person. Johannesburg leads engineering and protection studies, Cape Town adds commissioning support, London handles contracts and finance, and Wuxi supports China-made switchgear and enclosures.
Has USP&E delivered mission-critical power before?
Yes, USP&E has delivered 150+ power projects in 45+ countries, including power for data centres, mines and industrial sites that cannot tolerate outages. The track record above lists approved examples, and our design approach for critical facilities carries directly into healthcare.
Is USP&E a generator broker?
No, USP&E is a full-service EPC and O&M contractor, not a broker. We design, supply, install, commission and maintain generator plants, so the team that sizes your hospital generators is accountable for how they start, transfer and run through every test.
How quickly can USP&E respond to a hospital power enquiry?
USP&E replies to hospital enquiries within one working day. If you have a failed test or an urgent compliance issue, tell us and we will prioritise it. Send your one-line diagram, branch loads and current test records to help us respond with useful advice quickly.
What is NFPA 110 Level 1 Type 10?
USP&E explains it simply: Level 1 means the emergency power system protects life, and Type 10 means power must be restored within 10 seconds of a normal supply failure. Hospital life-safety and critical branches typically fall into this category under US codes.
How do I size a generator for a hospital?
USP&E sizes hospital generators from branch load data with realistic demand factors, then checks the largest motor-starting and UPS steps for voltage dip and frequency recovery. N+1 redundancy is usually added so one unit can be out of service without dropping essential loads.
How often must hospital generators be tested?
USP&E follows NFPA 110 in the US, which calls for monthly exercise under load and periodic longer-duration tests, with written records. Your accreditation body and local authority may add requirements. Check the code editions that apply to your facility and keep every test signed.
Can a hospital use gas generators instead of diesel?
USP&E sees many hospitals use gas engines or turbines for combined heat and power while keeping diesel for Level 1 emergency loads. Gas can serve emergency duty if the supply meets code reliability requirements, but on-site diesel storage remains the most common emergency choice.
Protect Every Life-Safety Load
With the right plant, your hospital rides through every outage and passes every test. With the wrong one, the next power cut becomes a clinical emergency. Let USP&E review your emergency power system.
Talk to an engineer through the USP&E contact page, on +27 10 822 2324 or at info@uspeglobal.com. You can also search the USP&E inventory for equipment that fits.
Powering Possibility. Built for the Frontier.