Medical office standby generator: exam rooms, cold storage and dental equipment

A medical office standby generator is planned around the loads a practice cannot lose: the refrigerators holding vaccines or samples, the exam and treatment room lighting, and the equipment a day of appointments depends on. Sizing comes from the equipment sheets, and the wiring follows the classification the design sets. We sell and install Generac home standby and commercial generators, and this guide covers how a practice moves from its list to a working system.

Does a medical office need a standby generator?

It depends on the building, its occupancy and what the code requires to stay on. The design professional and the authority having jurisdiction decide the classification under NEC Articles 700, 701 and 702. Beyond what the code requires, a practice can choose standby power so an outage does not cancel a day of patients.

The decision usually starts with two questions. What would an outage cost the practice in cancelled appointments? And what is in the refrigerators that cannot warm up? If either answer matters, those loads go on the list. You choose them with us, and the size follows the list rather than the size of the building.

What should a medical office put on a standby generator?

The list starts with what keeps patients moving and what cannot warm up: the refrigerators holding vaccines or samples, the exam and treatment room lighting, and the equipment a day of appointments depends on. After that come the front desk, the phones, the network and the security system, chosen with the practice manager.

• Vaccine and sample refrigeration.
• Exam and treatment room lighting.
• The equipment the schedule depends on, from each room's installation sheets.
• The front desk, the phones and the network equipment behind them.
• Security, and the lighting in the halls and the waiting room.

Our medical office standby generators page covers the scope of the work for medical and dental practices.

Can a standby generator keep a vaccine refrigerator running?

Yes, if the refrigerator is on the load list the generator and the transfer switch are sized for. We list it with the rest of the loads before we recommend a size, and confirm the circuit it is on, so the refrigerator is connected to the generator side of the switch and not left on a circuit that goes dark.

Confirm the circuit before the work, not after. A refrigerator plugged into an outlet that shares a circuit with a break room microwave, or that was moved to a new outlet after the panel schedule was written, is easy to miss. The panel schedule we leave names each room and each piece of equipment, so the next person to read it knows which circuits are on standby power. Any temperature monitoring or storage rules your vaccine program sets are the practice's to follow; our part is the power.

What does a dental office put on a standby generator?

In a dental office the list often means the chairs, the compressor, the vacuum pump and the sterilizers, along with the operatory lighting and the front desk. The compressor and vacuum pump are motors, so how they start is part of the sizing, not just what they draw while running.

Imaging units, sterilizers, compressors, vacuum pumps and dental chairs each come with an installation sheet naming the voltage, the circuit size and whether the circuit must be dedicated. Those sheets are where the load list comes from, so gather them before the walkthrough if you can. If a sheet is missing, we read the nameplate on site.

How is a medical office standby generator sized?

From the equipment sheets and from measurements. Each installation sheet names the voltage and circuit, and we measure at the panel what the building actually draws. The load list counts how the compressor and vacuum motors start, and leaves room for equipment the practice plans to add, such as a new operatory or imaging unit.

Where the job calls for stamped drawings, we work from the design professional's plans. Where it does not, the load list we build with you is the basis for the size and the transfer switch. Either way, the recommendation names which loads are on standby power, so the practice knows exactly what will run in an outage and what will not.

The requirements that shape a commercial system are in our post on commercial standby generator requirements, and the full commercial scope is on our commercial standby generators page.

Does NEC Article 517 apply to a medical office generator?

NEC Article 517 covers health care facilities, including medical and dental offices, wherever patients are examined or treated. Standby power itself is treated three ways: emergency systems in Article 700, legally required standby in Article 701, and optional standby in Article 702. The design professional and the authority having jurisdiction decide the classification.

We confirm the patient care spaces with the design, explain the 700, 701 and 702 question before the bid, and wire and separate the system to match the classification. The classification is not ours to pick. It is set by the building and the people who design and approve it, and the price follows from it.

Can a generator be installed without closing the practice?

Yes. Most of the work happens outside or away from patients. The shutdown to connect the transfer switch is planned around the schedule: after hours, agreed with the practice manager in writing, and with no circuit opened without knowing what equipment is on it. Noisy work is scheduled after hours too.

Plan the refrigerators into the shutdown as well. Keeping their doors closed while the power is off, and agreeing the timing with the person responsible for them, is part of the written plan. Inside San Antonio, the City's electrical permit application covers generators. Outside the city, we confirm what that city requires before we give you the price. The inspector looks at the panel labeling and the working space NEC 110.26 requires in front of each panel.

What fuel and placement does a medical office generator need?

A natural gas unit needs a gas line sized for the generator, and a diesel unit carries its own fuel tank that the fuel vendor fills. Placement is set by the setbacks and the service access the code and the manufacturer call for, and in a leased building it is settled with the property manager first.

Gas line and gas connection are not included. That is a licensed plumber's work and we quote it separately. We coordinate the plumber with the electrical work. The walkthrough looks at where the unit can sit, where the gas meter is, and how the truck reaches the pad, so the plan is known before you get a price.

How much does a medical office standby generator cost?

It depends on the list and the classification. A practice keeping its refrigeration and lighting on is a smaller system than one keeping every operatory running, and an emergency system is wired and tested differently from optional standby. You get a written price after the free sizing visit, which for a business is a walkthrough of the building.

Request a walkthrough from our medical and dental office generator page or through our contact page. The installation scope is on Generac generator installation, every size is on our Generac generators page, and a kitchen planning the same work can read restaurant standby generator.

After the install, scheduled maintenance covers the generator, the batteries and the transfer switch, with written records after each visit, and emergency systems carry the testing and records NFPA 110 and the authority having jurisdiction require. Our Generac generator maintenance schedule explains a service visit.