Power cuts can affect lighting, alarms, access controls, lifts, heating systems and other building services.

Even when normal electrical systems stop working, fire protection arrangements must remain ready to support the safety of people and property.

Common Risks During a Power Cut

A power cut may create additional risks, including:

• Reduced visibility
• Failed electrical equipment
• Loss of heating controls
• Increased use of portable lighting
• Electrical surges when power returns
• Reduced security
• Disrupted communication
• Confusion around evacuation routes

These risks should be considered in the building’s emergency procedures.

How Emergency Lighting Helps

Emergency lighting helps illuminate escape routes when normal lighting fails.

It can help people identify:

• Corridors
• Staircases
• Fire exits
• Doorways
• Changes in floor level
• Fire safety equipment

Emergency lighting should be regularly inspected and maintained so it is ready when required.

Do Sprinklers Need Normal Building Lighting?

Fire sprinklers operate independently of ordinary building lighting.

Their operation depends on heat reaching the sprinkler head, not on people seeing the fire or switching on the lights.

However, the sprinkler system still relies on correctly maintained equipment such as water supplies, pumps, valves and alarms.

The Importance of Sprinkler System Controls

A sprinkler system should be checked to ensure that control valves remain in the correct position and that equipment has not been isolated during electrical or building maintenance work.

Any planned isolation should be managed by competent professionals and restored as soon as the work is complete.

Protecting Electrical Areas

Electrical rooms, plant areas and service cupboards may contain equipment that can create fire risks during faults or power restoration.

These areas should be kept clear, inspected properly and protected in line with the building’s overall fire strategy.

What Happens When Power Returns?

When electricity is restored, equipment may restart automatically.

This can create additional risks if machinery, heating systems or electrical appliances have been damaged during the outage.

Building managers should follow suitable restart procedures and investigate any unusual smells, sounds, heat or visible damage.

Fire Alarms and Monitoring Systems

Fire alarm systems may have battery backup, but the backup period depends on the system and its condition.

A power cut can also affect remote monitoring, access control, lifts and communication equipment.

Testing should confirm that the fire alarm and related systems continue to operate as intended.

Keeping Escape Routes Clear

During a power cut, people may rely more heavily on emergency signs and lighting.

Escape routes should remain clear of boxes, stock, furniture, equipment and temporary cables.

Fire doors should also be kept closed where required and should never be wedged open.

Preparing a Power-Cut Procedure

A building should have a clear procedure for managing power failures.

This may include:

• Checking emergency lighting
• Confirming fire alarm status
• Inspecting plant areas
• Contacting the electricity provider
• Restricting unsafe areas
• Informing occupants
• Checking sprinkler controls
• Recording the incident
• Reviewing the system after power returns

Regular Testing Matters

Fire safety equipment should not be checked only after a power cut.

Regular professional inspections can help identify weak batteries, faulty alarms, damaged equipment, closed valves and other problems before an emergency occurs.

Conclusion

A power cut can change the way a building operates, but fire protection must remain ready.

Emergency lighting, fire alarms, sprinkler systems, clear escape routes and effective procedures all support safer buildings when normal power is unavailable.

At Sprinklers UK, we provide professional fire sprinkler design, inspection, maintenance and support for buildings across the UK.

Learn more at www.sprinklersuk.co.uk