Electrical Hazard Signs

Electrical Safety Signs help identify electrical hazards and warn people about potential dangers such as electric shock, high voltage equipment, live electrical systems and underground cables. They play a vital role in improving workplace safety and reducing the risk of accidents.

Also known as electrical warning signs, high voltage signs, electrical hazard signs and electricity danger signs, these signs are commonly used throughout industrial, commercial and public sector environments.

Electrical safety signs are widely used by facilities managers, electrical contractors, maintenance teams, construction companies, manufacturers, schools and local authorities. Common installation locations include substations, switch rooms, transformer compounds, distribution boards, plant rooms and restricted access areas.

Manufactured in the UK, our electrical safety signs are available in self-adhesive vinyl, rigid plastic, aluminium and photoluminescent glow in the dark materials to suit a wide range of indoor and outdoor applications.

Danger High Voltage Electrical Sign
Warn individuals of dangerous high voltage electrical hazards with this Danger High Voltage Electrical Sign.
• Alerts people to the presence of high voltage electrical hazards
• Suitable for electrical rooms, substations, switch rooms and industrial environments
• High-contrast yellow and black design ensures clear visibility and instant recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back), and Self Adhesive Vinyl
• Helps reduce the risk of electric shock and improve workplace safety compliance
Danger Buried Cables Electrical Sign
Warn workers of buried electrical cable hazards with this Danger Buried Cables Electrical Sign.
• Alerts workers to the presence of underground electrical cables
• Ideal for construction sites, excavation zones and utility areas
• High-contrast yellow and black design ensures clear visibility and instant recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back), and Self Adhesive Vinyl
• Helps reduce the risk of cable strikes, electrical accidents and excavation damage
Danger of Death Electrical Sign
Warn staff and visitors of potentially fatal electrical hazards with this highly visible danger sign for high-risk environments.
• Alerts individuals to deadly electrical danger
• Ideal for substations, electrical rooms and high-voltage areas
• High-visibility yellow and black design for clear recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reduce the risk of serious injury or death by clearly identifying life-threatening electrical hazards
Danger High Voltage Cables Underground Electrical Sign
Warn individuals of buried high voltage electrical cables with this Danger High Voltage Cables Underground Electrical Sign.
• Alerts individuals to underground high voltage cable hazards
• Ideal for construction sites, excavation areas and utility zones
• High-contrast yellow and black design ensures clear visibility and instant recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back), and Self Adhesive Vinyl
• Helps reduce the risk of serious injury, electrical accidents and excavation damage
Danger 240 Volts Electrical Sign
Clearly warns people of a 240 volt electrical hazard to help reduce the risk of electric shock or injury.
• Warns people of dangerous 240 volt electrical equipment or areas
• Suitable for plant rooms, workshops and electrical control areas
• High-contrast yellow and black design provides strong visibility and clear recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reinforce electrical hazard awareness and encourage safer access around electrical equipment
Danger 415 Volts Electrical Sign
Clearly warns people of a 415 volt electrical hazard to help reduce the risk of serious electric shock or injury.
• Warns people of dangerous 415 volt electrical equipment or areas
• Suitable for industrial sites, plant rooms and electrical panels
• High-contrast yellow and black design provides strong visibility and quick recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reinforce electrical hazard awareness and promote safer working around high-voltage equipment
Danger 400 Volts Electrical Sign
Clearly warns people of a dangerous 400 volt electrical hazard to help reduce the risk of electric shock or serious injury.
• Warns people of dangerous 400 volt electrical equipment or areas
• Suitable for industrial sites, plant rooms and electrical areas
• High-contrast yellow and black design provides strong visibility and clear recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reinforce electrical hazard awareness and support safer working around electrical equipment
Danger 440 Volts Electrical Sign
Clearly warns people of a dangerous 440 volt electrical hazard to help reduce the risk of electric shock or serious injury.
• Warns people of dangerous 440 volt electrical equipment or areas
• Suitable for industrial sites, plant rooms and electrical areas
• High-visibility yellow and black design provides strong visibility and clear recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reinforce electrical hazard awareness and promote safer working around electrical equipment
Danger 11000 Volts Electrical Sign
Clearly warns people of a dangerous 11000 volt electrical hazard to help reduce the risk of electric shock, serious injury or death.
• Warns people of dangerous 11000 volt electrical equipment or areas
• Suitable for substations, industrial sites and high voltage areas
• High-visibility yellow and black design provides strong visibility and clear recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reinforce high voltage electrical hazard awareness and support safer working practices
Danger Electric Shock Risk Electrical Sign
Clearly warns people of an electric shock hazard to help reduce the risk of serious injury or fatal accidents.
• Alerts people to the presence of an electric shock risk
• Suitable for workplaces, plant rooms and electrical areas
• High-visibility yellow and black design provides strong visibility and clear recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reinforce electrical safety awareness and encourage caution around hazardous electrical areas
Danger Live Wires Electrical Sign
Clearly warns people of live electrical wires to help reduce the risk of serious injury or electrical accidents.
• Alerts people to the presence of dangerous live electrical wires
• Suitable for workplaces, construction sites and electrical areas
• High-visibility yellow and black design provides clear recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reinforce electrical safety awareness and encourage caution around live wires
Danger Live Terminals Electrical Sign
Clearly warns people of live electrical terminals to help reduce the risk of serious injury from accidental contact.
• Alerts people to the presence of live electrical terminals and associated electrical hazards
• Suitable for electrical cupboards, plant rooms, control panels and switchgear areas
• High-visibility yellow and black design provides clear recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reduce accidental contact and supports safer working practices around electrical equipment
Danger Mains Voltage Electrical Sign
Clearly warns people of dangerous mains voltage to help reduce the risk of electric shock and serious injury.
• Alerts people to the presence of dangerous mains voltage and electrical hazards
• Suitable for industrial sites, plant rooms and electrical areas
• High-visibility yellow and black design provides clear and immediate recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reinforce electrical safety awareness and encourage caution around mains voltage
Voltage Symbol Electrical Sign With Yellow Background
Clearly warns people of an electrical hazard using a recognised high-voltage symbol to help reduce the risk of injury.
• Alerts people to electrical danger and high-voltage risks
• Suitable for workplaces, plant rooms and electrical areas
• High-visibility yellow and black design provides clear recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reinforce electrical safety awareness around hazardous electrical equipment
Isolate Main Supply Electrical Sign
Clearly warns personnel to isolate the main electrical supply before opening equipment to help reduce the risk of electric shock or injury.
• Instructs personnel to isolate the main supply before opening electrical equipment
• Suitable for plant rooms, electrical cabinets, maintenance areas and industrial sites
• High-visibility yellow and black design provides clear recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reinforce safe isolation procedures during servicing, inspection or maintenance
Live Busbars Electrical Sign
Clearly warns people of dangerous live busbars to help reduce the risk of serious injury from accidental contact with electrical components.
• Alerts people to the presence of live busbars and associated electrical hazards
• Suitable for electrical rooms, substations and industrial sites
• High-visibility yellow and black design provides clear and immediate recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reinforce electrical safety awareness and reduce accidental contact with live components
Danger 230 Volts Electrical Sign
Clearly warns people of a dangerous 230 volt electrical hazard to help reduce the risk of electric shock, serious injury or fatal accidents.
• Alerts people to the presence of a dangerous 230 volt electrical hazard
• Suitable for workplaces, plant rooms and electrical areas
• High-visibility yellow and black design provides clear and immediate recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reinforce electrical safety awareness and reduce the risk of electrical accidents
Warning Electric Fence Electrical Sign
Clearly warns people of an electric fence and potential electrical hazard to help reduce the risk of accidental contact.
• Alerts people to the presence of an electric fence and associated electrical risk
• Suitable for farms, agricultural land and restricted perimeters
• High-visibility yellow and black design provides clear and immediate recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reinforce electrical safety awareness and reduce accidental contact with electric fencing
Danger Electricity Electrical Sign
Clearly warns people of dangerous electricity to help reduce the risk of serious electrical injury or accidents.
• Alerts people to the presence of dangerous electricity and electrical hazards
• Suitable for workplaces, construction sites and utility areas
• High-visibility yellow and black design provides clear and immediate recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reinforce electrical safety awareness and reduce the risk of electrical incidents
Danger Of Death Electrical Sign
Clearly warns people of a potentially lethal electrical hazard to help prevent serious injury or fatal accidents.
• Alerts people to the presence of dangerous electrical risk
• Suitable for industrial sites, plant rooms and electrical areas
• High-contrast yellow and black design provides clear visibility and immediate recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reinforce critical electrical safety awareness in high-risk areas
Danger Of Death High Voltage Electrical Sign
Clearly warns people of potentially fatal electric shock from high voltage sources to help prevent serious injury or death.
• Alerts people to dangerous high voltage electrical hazards
• Suitable for electrical rooms, substations, plant areas and restricted zones
• Bold yellow and black design provides high visibility and instant recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reinforce electrical safety awareness around high voltage hazards
Mains Switch Electrical Sign
Clearly identifies the location of a mains electrical switch while warning people of the associated electrical hazard.
• Indicates the presence and location of a mains electrical switch
• Suitable for plant rooms, electrical cupboards and commercial premises
• High-contrast yellow and black design provides clear visibility and quick recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps improve safety awareness around electrical control points
Danger Overhead Cables Height Limit Electrical Sign
Warn staff, contractors and visitors of overhead electrical cables and height restrictions with this highly visible danger sign for hazardous environments.
• Alerts people to overhead cable hazards and height restrictions
• Suitable for construction sites, industrial areas and access routes
• High-visibility yellow and black design for clear recognition
• Available in Rigid Plastic (1mm), Rigid Plastic (2mm) and Self Adhesive Vinyl
• Helps reduce the risk of vehicles or equipment striking live overhead cables
Danger Overhead Live Wires Electrical Sign
Warn staff, contractors and visitors of hazardous overhead live electrical wires with this highly visible danger safety sign.
• Alerts people to the presence of overhead live electrical hazards
• Suitable for construction sites, industrial areas and outdoor work zones
• High-visibility yellow and black design for clear recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reduce the risk of accidental contact with live electrical wires
Danger Overhead Cables Electrical Sign
Clearly warns people of dangerous overhead electrical cables to help reduce the risk of accidental contact with live electrical hazards.
• Alerts people to overhead electrical cable hazards
• Suitable for construction sites, industrial areas and outdoor work zones
• High-contrast yellow and black design provides clear visibility and quick recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back), Self Adhesive Vinyl and Recyclable Correx ® (4mm)
• Helps improve electrical safety awareness and reduce the risk of accidental contact with live cables
Danger High Voltage Cables Overhead Electrical Sign
Warn staff, contractors and visitors of dangerous overhead high voltage cables with this highly visible electrical hazard sign.
• Alerts people to the presence of overhead high voltage cables
• Suitable for construction sites, industrial areas and utility zones
• High-visibility yellow and black design for clear recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reduce the risk of accidental contact with live electrical cables
Danger Switchgear Electrical Sign
Clearly warns people of dangerous electrical switchgear to help reduce the risk of serious injury or electrical accidents.
• Alerts people to the presence of dangerous electrical switchgear
• Suitable for plant rooms, electrical substations and industrial facilities
• High-contrast yellow and black design provides clear visibility and quick recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reinforce electrical safety awareness around switchgear and high-voltage equipment
Electrical Cupboard Sign
Clearly identifies an electrical cupboard, restricts unauthorised access and instructs people to keep the door locked.
• Warns of an electrical hazard while reinforcing restricted access and door security
• Suitable for electrical cupboards, plant rooms and maintenance areas
• High-contrast yellow, red and blue sections with clear symbols provide quick recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps prevent unauthorised access and supports safer control of electrical areas
Danger High Voltage - No Admittance Authorised Personnel Only Sign
Warn of high voltage hazards and restrict access to authorised personnel only with this highly visible combined danger and prohibition safety sign.
• Clearly warns of electrical danger and restricted access
• Ideal for plant rooms, electrical areas and restricted zones
• High-visibility yellow, black and red design for clear recognition
• Available in Aluminium Composite (3mm), Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps prevent unauthorised entry and reduce the risk of electrical injury
Danger Battery Charging Sign
Warns staff and visitors of battery charging hazards, helping improve safety awareness and reduce risks in designated charging areas.
• Warns people of hazards associated with battery charging areas
• Suitable for warehouses, workshops, plant rooms and maintenance areas
• High-contrast yellow and black warning design provides strong visibility and recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps improve safety awareness and reduce risks in charging zones
Warning Battery Charging In Progress Sign
Warns personnel that battery charging is in progress, helping increase awareness of associated hazards and improve safety around active charging areas.
• Alerts staff and visitors to battery charging activity and associated risks
• Suitable for warehouses, workshops, charging stations and plant rooms
• High-visibility yellow and black warning design provides quick recognition
• Available in Aluminium Composite (3mm), Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps reduce risks from electrical hazards, fumes and charging operations

Electrical Safety Signs Guide

Electrical Safety Signs are used to identify electrical hazards and communicate important safety information within workplaces and public environments. They warn employees, contractors and visitors about dangers including electric shock, high voltage equipment, live conductors and restricted access areas.

These signs form an essential part of workplace health and safety management, helping organisations reduce risk, improve awareness and maintain safer working environments around electrical installations.

Where Are Electrical Safety Signs Used?

  • Electrical switch rooms
  • Substations and transformer compounds
  • Distribution boards and control panels
  • Factories and manufacturing facilities
  • Warehouses and logistics centres
  • Construction sites
  • Plant rooms and maintenance areas
  • Solar and renewable energy installations

Available Materials

Self-Adhesive Vinyl

Ideal for smooth internal walls, electrical cabinets and equipment enclosures.

Rigid Plastic

Durable, cost-effective and suitable for most workplace environments.

Frequently Asked Questions


What are electrical safety signs?

Electrical safety signs warn people about electrical hazards including high voltage equipment, electric shock risks and live electrical systems.


Where should electrical safety signs be installed?

They should be displayed wherever electrical hazards exist, including switch rooms, substations, transformer compounds and electrical control panels.


What does a high voltage sign mean?

A high voltage sign warns that dangerous electrical voltages are present and that contact could result in serious injury or death.


Are electrical safety signs required in workplaces?

Electrical hazards should be clearly identified wherever risks remain and warning signage is necessary to communicate those dangers.


What colour are electrical warning signs?

Electrical warning signs typically feature a yellow background with black symbols and borders to indicate a potential hazard.


Can electrical safety signs be used outdoors?

Yes. Aluminium signs are particularly suitable for outdoor electrical installations and exposed environments.


Do glow in the dark electrical signs improve visibility?

Yes. Photoluminescent signs remain visible during power failures and low-light conditions, helping maintain hazard awareness.


What is the difference between electrical warning signs and danger signs?

Warning signs highlight potential hazards, while danger signs are generally used where there is a severe or immediate risk of serious injury.


Do you offer custom electrical safety signs?

Yes. Rainbow Safety can manufacture bespoke electrical safety signs with custom wording, symbols and site-specific instructions.

Why Buy From Rainbow Safety?

  • Manufactured in the UK
  • Over 30 years of safety signage expertise
  • Fast dispatch on standard products
  • Trade discounts available
  • Custom signage manufactured to order
  • Large range of workplace safety signs
  • Trusted by UK businesses, schools, contractors and local authorities
  • Expert support from an experienced safety signage team