Electrical cupboards are found in almost every type of commercial building, from offices and schools to warehouses, hospitals, shops and industrial premises.

They may contain distribution boards, electrical meters, control equipment, switchgear or other electrical installations.

Although many electrical cupboards look similar from the outside, the equipment inside can vary considerably.

So what signs should be displayed on an electrical cupboard? Is a Danger Electricity Sign enough? Do you need an Electrical Cupboard Sign , a High Voltage Warning , or an Authorised Personnel Only notice?

The correct choice depends on the installation, the hazards present and who may need access.

In this guide, we'll explain the different types of electrical cupboard signs, where they may be appropriate and what to consider before ordering.

Why Are Electrical Cupboard Signs Important?

Electrical cupboard signs can serve several different purposes.

They may help:

• Warn people about electrical hazards.

• Identify the location of electrical equipment.

• Communicate access restrictions.

• Reinforce relevant safety instructions.

• Help maintenance staff locate electrical installations.

For example, a cupboard labelled Electrical Cupboard tells people what is inside.

A Danger Electricity Sign communicates a hazard.

An Authorised Personnel Only notice communicates an access restriction.

These messages are related, but they aren't interchangeable.

The best electrical cupboard signage communicates the information people actually need before approaching or opening the cupboard.

Which Signs Should Be Displayed on an Electrical Cupboard?

There isn't one universal combination of signs required for every electrical cupboard.

The correct selection depends on the equipment, the risks and the applicable safety arrangements.

Here are the main options to consider.

1. Danger Electricity Signs

A Danger Electricity Sign provides a general warning about an electrical hazard.

It commonly features the recognised electrical warning symbol: a black lightning bolt inside a yellow triangle.

This is identified as symbol W012 in BS EN ISO 7010.

Where Might a Danger Electricity Sign Be Used?

Depending on the installation and relevant assessment, it may be appropriate for:

• Electrical distribution cupboards.

• Electrical equipment cabinets.

• Switchgear enclosures.

• Plant room electrical cupboards.

• Industrial control cabinets.

• Other relevant electrical installations.

When Should You Choose One?

A Danger Electricity Sign may be suitable where an electrical hazard needs to be communicated but a more specific voltage warning isn't necessary.

For example, an electrical cupboard containing low-voltage distribution equipment may need a general electrical hazard warning rather than a High Voltage Sign.

Buying tip: Don't assume that every electrical cupboard contains high-voltage equipment. Choose wording that accurately reflects the installation.

2. Electrical Cupboard Signs

An Electrical Cupboard Sign identifies the cupboard's purpose.

Unlike a hazard warning, its primary function is to tell people that the cupboard contains electrical equipment.

Where Are Electrical Cupboard Signs Useful?

They may be appropriate in:

• Office buildings.

• Schools and colleges.

• Commercial properties.

• Hospitals and healthcare premises.

• Retail buildings.

• Warehouses.

• Apartment blocks and shared buildings.

An identification sign can help facilities teams, contractors and maintenance staff locate the correct cupboard.

Is an Electrical Cupboard Sign the Same as a Danger Electricity Sign?

No.

An Electrical Cupboard Sign identifies the location.

A Danger Electricity Sign warns about an electrical hazard.

Depending on the circumstances, both messages may be useful.

However, adding an identification sign doesn't automatically satisfy any requirement for an electrical hazard warning.

3. High Voltage Warning Signs

A High Voltage Warning Sign specifically identifies a high-voltage hazard.

It may be appropriate where the cupboard or enclosure contains genuinely high-voltage equipment.

Examples can include certain industrial electrical installations and specialist switchgear enclosures.

Should Every Electrical Cupboard Have a High Voltage Sign?

No.

Many electrical cupboards contain low-voltage distribution equipment.

Using a High Voltage Sign where high voltage isn't present may communicate inaccurate information.

In the context of the Electricity at Work Regulations 1989, high voltage generally means voltage exceeding 1,000 volts AC or 1,500 volts DC.

However, lower-voltage systems can still cause serious or fatal injuries.

A general Danger Electricity warning may be more appropriate than a High Voltage Sign for some electrical cupboards.

4. Authorised Personnel Only Signs

Some electrical cupboards and equipment rooms require restricted access.

An Authorised Personnel Only Sign communicates that access is limited to people with appropriate permission.

These notices may be useful where:

• Electrical equipment requires controlled access.

• The cupboard forms part of a restricted plant area.

• Maintenance access is limited to designated personnel.

• Unauthorised access could create additional risks.

Does Every Electrical Cupboard Need an Authorised Personnel Only Sign?

Not necessarily.

The need for access restrictions depends on the installation, location and relevant safety arrangements.

Where access must be controlled, a sign should support suitable locks, barriers or other physical security measures.

A notice alone doesn't prevent someone from opening an unlocked cupboard.

5. Keep Clear & Do Not Obstruct Signs

Some electrical cupboards need to remain accessible for inspection, maintenance or emergency operations.

A Keep Clear or Do Not Obstruct notice may help communicate the need to maintain access.

These signs may be particularly useful where cupboards are located near:

• Storage areas.

• Corridors.

• Plant rooms.

• Warehouse operations.

• Building service areas.

However, the correct access and clearance arrangements depend on the installation.

A Keep Clear Sign doesn't establish the safe clearance distance for electrical equipment.

6. Electrical Isolation & Maintenance Notices

Electrical cupboards may also be associated with maintenance or isolation activities.

Relevant notices can include:

• Do Not Switch On.

• Isolate Main Supply.

• Electrical Equipment Under Maintenance.

• Other suitable maintenance instructions.

These messages serve a different purpose from permanent cupboard identification.

Should a Do Not Switch On Sign Be Left on the Cupboard Permanently?

Not as a substitute for a proper maintenance procedure.

Temporary warnings and notices should be used within an appropriate safe system of work.

A sign alone does not electrically isolate equipment or prevent it from being re-energised.

Electrical Cupboard Signs: Which Combination Do You Need?

The table below provides examples of sign choices for different situations.

These are examples rather than a universal list of legally required signs.

The correct selection should reflect the installation and relevant assessment.

Where Should Electrical Cupboard Signs Be Positioned?

The position of an electrical cupboard sign is just as important as its wording.

On the Outside of the Cupboard Door

Where the warning needs to be seen before the cupboard is opened, the outside of the door is often an appropriate location.

This allows people to recognise the hazard before accessing the equipment.

At Eye Level Where Practical

Signs should be positioned where they can be seen and understood.

The most suitable height depends on the cupboard, the surroundings and the intended viewing position.

Avoid Hidden or Obscured Signs

A warning may be ineffective if it is hidden by:

• Open doors.

• Stored equipment.

• Shelving.

• Other notices.

• Building fixtures.

Consider how people normally approach the cupboard.

Consider More Than One Access Point

Larger electrical rooms or equipment areas may have multiple entrances.

Each relevant approach may need suitable warnings.

Buying tip: Before ordering, check whether the sign will be read from directly in front of the cupboard or from further along a corridor.

What Size Electrical Cupboard Sign Should You Buy?

Electrical cupboard signs are available in different sizes.

The correct choice depends on where the sign will be installed and how far away it needs to be seen.

Small Electrical Cabinet Signs

Smaller signs may be suitable for equipment panels and cupboards viewed at close range.

Standard Cupboard Door Signs

A medium-sized warning may be appropriate for a cupboard door in an office, school or commercial building.

Larger Electrical Room Signs

Larger signs may be needed at plant room entrances or industrial locations where the warning must be recognised from further away.

Factors to Consider

• Viewing distance.

• Door dimensions.

• Available mounting space.

• Lighting conditions.

• Symbol and wording legibility.

• Whether the cupboard is recessed or partially obscured.

There is no single sign size suitable for every electrical cupboard.

Self-Adhesive Electrical Cupboard Signs vs Rigid Signs

The sign material should suit the mounting surface and environment.

Self-Adhesive Vinyl Signs

Self-adhesive vinyl may be suitable for compatible smooth, clean surfaces.

Typical applications include:

• Metal cupboard doors.

• Smooth equipment panels.

• Suitable cabinet surfaces.

Check that the surface is clean, dry and compatible with the adhesive.

Rigid Plastic Signs

Rigid plastic may be suitable where a more substantial mounted signboard is preferred.

Typical applications include:

• Walls beside electrical cupboards.

• Plant room entrances.

• Building service areas.

• Suitable mounting panels.

Other Sign Materials

Selected electrical hazard signs at The Sign Shed are available in other materials, including recycled plastic, Foamex and aluminium composite.

Check the individual product specifications for available options.

Which Material Is Best?

For a smooth cupboard door, a self-adhesive sign may be convenient.

For a wall or rougher mounting surface, a rigid signboard may be more suitable.

Consider cleaning procedures, moisture, temperature and other environmental conditions before ordering.

Are Electrical Cupboard Signs a Legal Requirement in the UK?

Electrical safety at work is governed by several requirements.

The Electricity at Work Regulations 1989 establish duties relating to electrical systems and work activities.

The Health and Safety (Safety Signs and Signals) Regulations 1996 require appropriate safety signs where significant risks remain after other relevant control measures have been taken.

BS EN ISO 7010 provides recognised graphical symbols for safety signs, including the electrical hazard warning symbol W012.

However, there isn't one universal rule requiring every electrical cupboard to display the same combination of notices.

The correct signage depends on the equipment, hazards and applicable requirements.

Does an Electrical Cupboard Sign Make the Installation Compliant?

No.

Electrical cupboard signs should support suitable safety arrangements, including:

• Appropriate electrical installation and maintenance.

• Suitable access controls.

• Competent electrical work.

• Safe isolation procedures.

• Relevant risk assessments.

• Safe working practices.

A warning sign doesn't make exposed live parts safe or prevent unauthorised access by itself.

Electrical Cupboard Signs for Different Buildings

Different environments can create different purchasing requirements.

Offices & Commercial Buildings

Office buildings may contain electrical distribution cupboards in corridors, service areas or dedicated rooms.

Suitable identification and hazard warnings can help communicate their purpose and risks.

Schools & Colleges

Electrical cupboards in schools may be located near classrooms, corridors or maintenance areas.

Access controls and suitable warnings should reflect the installation and the possibility of pupils encountering the area.

Warehouses & Factories

Industrial environments may contain electrical control cabinets, switchgear and distribution equipment.

Signs should remain visible despite machinery, stored goods and changing work activities.

Hospitals & Healthcare Buildings

Healthcare premises may have electrical cupboards serving critical building systems.

Clear identification can help maintenance teams locate equipment, while appropriate warnings communicate relevant hazards.

Residential Blocks & Shared Buildings

Communal areas may contain electrical meter cupboards or distribution equipment.

Suitable identification, warnings and access controls depend on the installation and building arrangements.

Common Mistakes When Buying Electrical Cupboard Signs

Avoid these frequent mistakes:

1. Assuming every cupboard requires a High Voltage Sign.

2. Using an Electrical Cupboard identification sign instead of a necessary hazard warning.

3. Selecting a sign without checking the equipment inside.

4. Installing warnings only on the inside of a cupboard door.

5. Choosing a sign too small for the viewing distance.

6. Using self-adhesive vinyl on an unsuitable surface.

7. Displaying access restrictions without suitable physical controls.

8. Allowing storage or equipment to obscure warning notices.

9. Treating a Do Not Switch On Sign as a substitute for electrical isolation.

10. Failing to update signage when the installation changes.

Electrical Cupboard Signs: Buying Checklist

Before placing an order, use this checklist.

Identify the Cupboard

• Electrical equipment identified.

• Operating voltage confirmed.

• Electrical hazards assessed.

• Access arrangements reviewed.

• Maintenance requirements considered.

Choose the Signs

• Danger Electricity warning considered.

• Electrical Cupboard identification considered.

• High Voltage warning selected only where appropriate.

• Restricted access notice reviewed.

• Keep Clear notice considered.

• Temporary maintenance notices assessed separately.

Select Size & Material

• Viewing distance checked.

• Suitable sign size selected.

• Mounting surface inspected.

• Sign material chosen.

• Quantity confirmed.

Installation & Maintenance

• Warning visible before opening the cupboard.

• Sign not obscured.

• Damaged notices identified for replacement.

• Signage reviewed when equipment changes.

Frequently Asked Questions

What Sign Should Be on an Electrical Cupboard Door?

A Danger Electricity Sign or Electrical Cupboard Sign may be appropriate, depending on the installation. In some circumstances, both identification and hazard warning messages may be useful.

Is a Danger Electricity Sign Required on Every Electrical Cupboard?

Not automatically. The need for a warning depends on the hazards and applicable safety requirements.

Do Electrical Cupboards Need High Voltage Signs?

Only where the warning accurately reflects the installation and is appropriate to the hazard. Many electrical cupboards contain low-voltage equipment.

What Is the Electrical Hazard Warning Symbol?

The recognised electrical hazard warning symbol is a black lightning bolt inside a yellow triangle, identified as W012 in BS EN ISO 7010.

Should an Electrical Cupboard Be Labelled?

Clear identification may be useful for maintenance and building management. Whether a particular sign is required depends on the installation and relevant requirements.

Do Electrical Cupboards Need Authorised Personnel Only Signs?

Not necessarily. Access restriction notices may be appropriate where controlled access is required.

Can I Use a Self-Adhesive Sign on a Metal Electrical Cupboard?

Self-adhesive vinyl may be suitable for a compatible smooth, clean metal surface. Check the product specifications and surface condition.

What Size Electrical Cupboard Sign Should I Buy?

Choose a size appropriate for the cupboard, viewing distance, lighting and available space.

Where Should Electrical Cupboard Warning Signs Be Positioned?

They should be visible before people encounter the hazard. The outside of the cupboard door is often a suitable location where a warning is required.

Are Electrical Cupboard Signs Suitable for Outdoor Cabinets?

Selected products may be suitable for outdoor applications where the material and fixing method are appropriate for the conditions.

Buy Electrical Cupboard & Electrical Hazard Signs from The Sign Shed

Whether you're identifying an electrical distribution cupboard, updating plant room notices or replacing warning signs across several buildings, choosing the correct signage helps communicate electrical hazards clearly.

At The Sign Shed , we supply a wide range of Electrical Hazard Signs for UK offices, schools, warehouses, factories, commercial properties and industrial premises.

Our collection includes:

• Danger Electricity Signs.

• Electrical Cupboard Signs.

• High Voltage Warning Signs.

• Electric Shock Risk Signs.

• Danger of Death Signs.

• Electrical Isolation Notices.

Choose from a selection of sizes and materials to suit different applications.

Made in Britain , with automatic bulk savings available on eligible orders.

Shop Electrical Hazard Signs at The Sign Shed and find suitable warnings for your electrical cupboards and equipment.