How Can I Protect My Dental Practice’s Equipment From Power Surges and Outages?
A power cut is more than an inconvenience for a dental practice.
If the electricity goes off during the working day, treatment may need to stop, computers and practice management systems can go offline, and essential equipment may have to be shut down.
There is also another risk that is sometimes overlooked: power returning after an outage or experiencing a voltage surge can potentially damage sensitive electrical and electronic equipment.
For dental practices in Bournemouth, Poole, Christchurch and across Dorset, having a plan for both power surges and power outages can help reduce equipment damage, disruption and unnecessary downtime.
So, how can you protect your practice?
The answer usually involves a combination of surge protection, appropriate UPS systems, emergency lighting, electrical inspections and a practical power-outage procedure.
What can happen to a dental practice during a power outage?
Modern dental practices rely on electricity for far more than lighting.
Depending on the practice, equipment and systems may include:
- Dental chairs and treatment units
- Dental surgery lighting
- X-ray equipment and digital sensors
- Computers and monitors
- Practice management software
- Routers and networking equipment
- Telephone systems
- Autoclaves and sterilisation equipment
- Air compressors
- Suction systems
- Security systems
- Fire alarm systems
- Emergency lighting
A short interruption may simply mean resetting equipment and waiting for the electricity to return.
A longer outage can have a much bigger operational impact.
NHS England’s guidance for primary dental services specifically recognises power failure as an event that can make it impossible to provide dental services from the premises.
That makes electrical resilience worth considering as part of the practice’s wider business continuity planning.
What is a power surge and why can it damage dental equipment?
A power surge is a short-duration increase in electrical voltage.
Surges can have different causes, including events on the electricity network and lightning-related electrical activity. Even when a surge lasts only a fraction of a second, sensitive electronic equipment can potentially be affected.
This matters in a dental practice because many modern systems contain electronic components.
For example, a practice could have expensive electronics in:
- Digital X-ray systems
- Computers and servers
- Monitors
- Dental chairs
- Imaging equipment
- Networking equipment
- Electronic control systems
That does not mean every power surge will damage equipment. However, the potential cost of replacing sensitive equipment makes prevention worth considering.
This is where surge protection can play a role.
How does surge protection work in a dental practice?
A Surge Protective Device (SPD) is designed to help protect an electrical installation and connected equipment from transient overvoltages.
Rather than relying solely on a plug-in surge-protected extension lead, a practice can ask an electrician to assess whether protection at the electrical installation level is appropriate.
BS 7671 includes requirements relating to surge protective devices, including provisions within Regulations 443 and 534.
The important point is that surge protection should not simply be treated as buying a few inexpensive extension leads.
A qualified electrician can look at the practice’s:
- Existing consumer unit/distribution board
- Electrical installation
- Earthing arrangements
- Critical equipment
- Existing protection
- Electrical demand
- Proposed SPD arrangement
They can then determine what protection is appropriate for the building and equipment.
Should every dental practice install an SPD?
Not necessarily in exactly the same configuration.
The appropriate solution depends on the individual electrical installation, risk assessment and equipment.
For a Dorset dental practice with significant investment in electronic equipment, however, it is sensible to discuss surge protection with a competent electrician rather than assuming standard sockets provide sufficient protection.
What is a UPS and does my dental practice need one?
A UPS (Uninterruptible Power Supply) provides temporary battery power when the mains supply fails.
It is important to understand what a UPS is—and isn’t.
A UPS generally isn’t intended to keep an entire dental practice operating indefinitely during a major power cut.
Instead, it can provide short-term backup to selected critical equipment.
For example, a practice might consider UPS protection for:
- Practice computers
- Servers
- Network equipment
- Routers
- Monitors
- Telephone equipment
- Other sensitive electronic systems
The UPS can provide enough time for equipment to be shut down correctly or, depending on its capacity and load, keep selected systems running for a limited period.
The correct UPS depends on the equipment’s power requirements and how long the practice needs it to operate.
Don’t simply buy the biggest UPS available and connect everything to it.
A better approach is to identify which systems are genuinely critical and have an electrician or suitably qualified IT/equipment professional assess the requirements.
What about dental chairs, X-ray machines and autoclaves?
This is where a dental practice needs to be particularly careful.
Not every piece of dental equipment should automatically be connected to a standard UPS or backup power system.
Large or specialist equipment may have specific electrical requirements set by the manufacturer.
For example, an X-ray system, autoclave or compressor may require particular:
- Electrical ratings
- Circuits
- Isolation arrangements
- Load capacity
- Earthing arrangements
- Installation requirements
The manufacturer’s instructions should therefore be checked before making changes to the electrical supply.
HSE guidance also stresses that electrical equipment must be suitable for the electrical supply being used and that specialised equipment may need to be inspected or tested by someone with specific competence in that equipment.
The solution isn’t to put every appliance on a backup battery.
Instead, identify your critical equipment and establish what protection or backup arrangement is appropriate for each item.
What should a Dorset dental practice do during a power cut?
Stop treatment safely
If a power failure occurs during treatment, staff should follow the practice’s clinical and safety procedures to make the patient safe.
Establish whether the problem is local
Check whether the whole building has lost power or whether only part of the practice is affected.
If appropriate and safe, staff can check the consumer unit for an obvious tripped protective device.
Protect sensitive equipment
Where appropriate, safely shut down computers and other equipment rather than repeatedly switching equipment on and off while the supply is unstable.
Equipment connected to a UPS may have additional protection and shutdown time.
Check emergency lighting
Emergency lighting is particularly important if normal lighting is unavailable.
Recent CQC dental inspection reports demonstrate why this should not be overlooked. For example, a 2026 inspection found a practice had automatic emergency lighting but could not demonstrate appropriate testing, while another dental practice was criticised because emergency lighting had not been properly maintained.
Contact the electricity network if appropriate
If the problem is an external power cut, the local electricity network operator is responsible for dealing with the network fault.
Ofgem explains that power cuts can result from faults, damage or severe weather and provides information about reporting interruptions and network-operator responsibilities.
Know when to call an electrician
If the problem appears to be within the practice rather than the external electricity network, a competent electrician should investigate it.
Having equipment protection is only half the solution. Your staff should also know what to do if the power suddenly disappears.
A simple practice procedure could include:
They should not repeatedly reset a device that keeps tripping.
Repeated tripping can indicate an underlying electrical or equipment fault.
Can a power cut damage dental equipment?
It can, depending on the circumstances and the equipment involved.
The interruption itself isn’t necessarily what causes damage.
The bigger concern may be what happens to the electrical supply during an interruption, restoration or other abnormal electrical event.
Sensitive electronic equipment can be vulnerable to electrical disturbances, which is why practices should consider a combination of:
Good electrical installation + surge protection + appropriate backup power + equipment maintenance + a power-outage procedure.
It is also important not to overlook the condition of the underlying electrical installation.
An SPD or UPS isn’t a substitute for maintaining the practice’s wiring, protective devices and equipment.
HSE guidance states that electrical equipment and installations should be maintained to prevent danger, with checks and testing appropriate to the equipment, environment and risk
How can I reduce the risk of electrical problems before they cause an outage?
Prevention is usually better than trying to deal with a failed system in the middle of a busy surgery.
A Dorset dental practice should consider:
Regular electrical inspections
An Electrical Installation Condition Report (EICR) can help identify deterioration, defects and other issues within the fixed electrical installation.
Carl Ashley Electrical Services provides electrical testing and inspection services, including EICRs and PAT testing, for commercial clients in and around Bournemouth.
Appropriate equipment testing
Electrical equipment should be maintained according to its risk and use.
HSE guidance specifically says there is no universal legal requirement for every portable appliance to receive an annual PAT test. The appropriate inspection and testing regime should be based on risk, equipment and the working environment
Check for overloaded sockets
Avoid excessive use of extension leads and adapters.
This is particularly relevant as practices add computers, chargers, monitors and other electronic equipment.
A recent CQC dental inspection, for example, identified daisy-chained electrical wiring under a desk, noting the risk of overloading and excessive heat.
Maintain emergency lighting
Emergency lighting needs to be installed, maintained and tested appropriately so that staff and patients aren’t left in darkness if the normal supply fails.
Review your consumer unit
If your practice has older electrical equipment or has significantly increased its electrical demand, it may be worth having the installation assessed.
Carl Ashley’s electrical FAQ notes that consumer-unit upgrades can help installations accommodate increased electrical demand, although the existing installation should be assessed first.
What should be included in a dental practice power-outage plan?
A useful plan doesn’t need to be complicated.
NHS England has highlighted major power failure as a potential business-continuity issue for healthcare premises, while its dental policy specifically recognises power failure as an event that can prevent dental services being delivered from the premises.
You should consider the following:
Who is responsible?
Nominate someone to coordinate the response.
What equipment is critical?
List equipment that needs to be shut down, protected or kept operational.
Where is the consumer unit?
Make sure authorised staff know where it is and understand what they can safely check.
Where are the emergency lights and torches?
Keep backup lighting accessible.
Who is the electricity network operator?
Keep the relevant contact details available.
Who is your electrician?
Keep your electrical contractor’s details accessible, particularly if an internal electrical fault is suspected.
What happens to appointments?
Your practice’s business continuity arrangements should explain how patients are contacted and how appointments are managed if the practice cannot safely operate.
NHS England has highlighted major power failure as a potential business-continuity issue for healthcare premises, while its dental policy specifically recognises power failure as an event that can prevent dental services being delivered from the premises.
Protecting Your Dental Practice Before the Next Power Problem
A power outage doesn’t have to mean losing control of the situation.
For a dental practice, the best approach is to consider the problem before the electricity fails.
Start by identifying your critical equipment and systems. Then consider whether your practice would benefit from:
- Surge Protective Devices
- UPS systems for selected equipment
- Appropriate emergency lighting
- Electrical installation testing
- Equipment inspection and testing
- A maintained consumer unit and electrical installation
- A documented power-outage procedure
- Regular reviews of your electrical risks
The right solution will depend on the individual practice, its equipment and its electrical installation.
If you’re a dental practice in Bournemouth, Poole, Christchurch or elsewhere in Dorset and want to discuss protecting your electrical systems and equipment, Carl Ashley Electrical Services can assess your requirements and advise on suitable electrical solutions.
Don’t wait until a power problem stops your practice. A preventative electrical assessment could help you identify vulnerabilities before they become an expensive disruption.
Get In Touch With Carl Ashley Electrical For Electrical Support
If you’re looking for an EICR for your dental practice, contact Carl Ashley Electrical Services. We’re fully qualified and equipped with everything you need. To find out more, give us a call today.
