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
Warns individuals of dangerous high voltage electrical hazards to prevent serious injury or death
• Alerts people to the presence of high voltage electricity
• Suitable for electrical rooms, substations, and industrial environments
• High contrast yellow and black design ensures clear visibility
• Available in durable materials for indoor and outdoor use
• Helps reduce risk and improve workplace safety compliance
Danger Buried Cables Electrical Sign
Warns of buried electrical cables to prevent accidental damage and serious injury during excavation or ground works.
• Alerts workers to the presence of underground electrical hazards
• Ideal for construction sites, excavation zones, and utility areas
• High-contrast yellow and black design ensures clear visibility
• Available in durable materials suitable for various environments
• Helps reduce risk of cable strikes and associated accidents
Danger of Death Electrical Sign
Warns of a potentially fatal electrical hazard to prevent serious injury or death.
• Alerts individuals to deadly electrical danger
• Ideal for substations, electrical rooms, and high-voltage areas
• High-contrast yellow and black design ensures strong visibility
• Available in durable materials suitable for indoor and outdoor use
• Helps reduce risk by clearly communicating life-threatening hazards
Danger High Voltage Cables Underground Electrical Sign
Warns of buried high voltage electrical cables to prevent accidental contact or excavation hazards.
• Alerts individuals to underground high voltage cable danger
• Ideal for construction sites, excavation areas, and utility zones
• High-contrast yellow and black design ensures clear visibility
• Available in durable materials suitable for long-term use
• Helps reduce risk of serious injury or electrical accidents
Danger 240 Volts Electrical Sign
Warns of a 240 volt electrical hazard to reduce the risk of shock or injury in high-risk environments.  
• Clearly warns of 240 volt electrical danger  
• Suitable for plant rooms, workshops, and electrical control areas  
• High-contrast yellow and black design ensures strong visibility  
• Available in Rigid Plastic (1mm), Rigid Plastic (2mm) and Self Adhesive Vinyl
• Helps prevent accidents and promotes electrical safety awareness  
Danger 415 Volts Electrical Sign
Warns of a 415 volt electrical hazard to reduce the risk of serious shock or injury in high-voltage areas.
• Clearly alerts individuals to the presence of 415 volt electrical danger
• Suitable for industrial sites, plant rooms, and electrical panels
• High-contrast design ensures maximum visibility and quick recognition
• Available in durable materials for long-lasting performance
• Helps prevent accidents and promotes safe working environments
Danger 400 Volts Electrical Sign
Warns individuals of the presence of dangerous 400 volt electrical hazards to prevent serious injury or death.
• Provides a clear warning of high voltage electrical danger
• Suitable for use in industrial sites, plant rooms, and electrical areas
• Bold black text and symbol on yellow background for high visibility
• Available in Rigid Plastic (1mm), Rigid Plastic (2mm) and Self Adhesive Vinyl
• Helps reduce the risk of electric shock and supports workplace safety compliance
Danger 440 Volts Electrical Sign
Warns of the presence of dangerous 440 volt electrical hazards to prevent serious injury or death.
• Clearly alerts individuals to high voltage electrical danger
• Ideal for industrial sites, plant rooms, and electrical areas
• High visibility yellow background with bold black text and symbol
• Available in durable Rigid Plastic (1mm), Rigid Plastic (2mm) and Self Adhesive Vinyl
• Helps reduce risk of electric shock and improves workplace safety awareness
Danger 11000 Volts Electrical Sign
Warns individuals of dangerous 11000 volt electrical hazards to prevent serious injury or death
• Provides a clear warning of extreme high voltage electrical danger
• Suitable for use in substations, industrial sites, and high voltage areas
• Bold black text and symbol on yellow background for maximum visibility
• Available in durable materials for long-lasting performance
• Helps reduce the risk of electric shock and supports workplace safety compliance
Danger Electric Shock Risk Electrical Sign
Warns individuals of electric shock hazards to prevent serious injury or fatal accidents in high-risk areas.
• Alerts people to the presence of electric shock risk
• Ideal for workplaces, plant rooms, and electrical areas
• High-visibility yellow background with bold black text and symbol
• Available in durable rigid plastic or self adhesive vinyl
• Helps improve safety awareness and reduce accident risk
Danger Live Wires Electrical Sign
Warns individuals of the presence of live electrical wires to prevent serious injury or accidents.
• Clearly warns of dangerous live electrical hazards
• Suitable for workplaces, construction sites, and electrical areas
• High-contrast yellow and black design ensures clear visibility
• Available in durable materials for long-lasting use
• Helps reduce risk of electrical accidents and improves safety awareness
Danger Live Terminals Electrical Sign
Warns of exposed live electrical terminals and the risk of serious injury from contact.
• Warns of live electrical terminals and electrical hazards
• Suitable for electrical cupboards, plant rooms, control panels and switchgear areas
• High-contrast yellow and black design ensures clear visibility
• Available in durable Rigid Plastic (1mm), Rigid Plastic (2mm) and Self Adhesive Vinyl
• Helps reduce accidental contact and supports safer working practices
Danger Mains Voltage Electrical Sign
Warns of dangerous mains electrical voltage to prevent serious injury or fatal accidents.
• Alerts individuals to the presence of high voltage electrical hazards
• Suitable for use in industrial sites, plant rooms, and electrical areas
• Bold yellow and black design ensures high visibility and instant recognition
• Available in durable rigid plastic and self adhesive vinyl materials
• Helps reduce risk of electric shock and supports workplace safety awareness
Voltage Symbol Electrical Sign With Yellow Background
Warns of electrical hazards using a clear voltage symbol to reduce the risk of injury.
• Alerts individuals to electrical danger and high voltage risks
• Suitable for workplaces, plant rooms, and electrical areas
• High-contrast yellow and black design ensures strong visibility
• Available in durable Rigid Plastic (1mm), Rigid Plastic (2mm) and Self Adhesive Vinyl
• Helps improve safety awareness around hazardous electrical equipment
Isolate Main Supply Electrical Sign
Warns personnel to isolate the main electrical supply before opening equipment to prevent electric shock or injury
• Ensures electrical systems are safely isolated before access
• Ideal for plant rooms, electrical cabinets, maintenance areas, and industrial sites
• High-contrast yellow and black design for maximum visibility
• Available in durable materials suitable for long-term use
• Helps reduce risk of electrical accidents during servicing or inspection
Live Busbars Electrical Sign
Warns of dangerous live busbars and electrical hazards to prevent serious injury or death
• Alerts individuals to high-risk electrical hazards
• Ideal for electrical rooms, substations, and industrial sites
• High-visibility yellow and black design for immediate recognition
• Available in durable rigid plastic and self adhesive vinyl options
• Helps reduce risk of accidental contact with live electrical components
Danger 230 Volts Electrical Sign
Warns of dangerous 230 Volt electrical hazards to prevent injury or fatal incidents.
• Clearly alerts people to high voltage electrical danger
• Suitable for workplaces, plant rooms, and electrical areas
• High-contrast design ensures excellent visibility
• Durable materials suitable for long-term use
• Helps reduce risk of electrical accidents and injuries
Warning Electric Fence Electrical Sign
Warns individuals of the presence of an electric fence and potential electrical hazard.
• Alerts people to high voltage electric fence risks
• Ideal for farms, agricultural land, and restricted perimeters
• Bold yellow background with clear black text and symbol for high visibility
• Available in durable rigid plastic or self adhesive vinyl options
• Helps prevent accidental contact and improves site safety awareness
Danger Electricity Electrical Sign
Warns of electrical hazards to prevent serious injury or fatal accidents.
• Alerts individuals to the presence of dangerous electricity
• Suitable for workplaces, construction sites, and utility areas
• High-contrast design ensures clear visibility and instant recognition
• Durable materials suitable for long-term indoor or outdoor use
• Helps reinforce safety awareness and reduce risk of electrical incidents
Danger Of Death Electrical Sign
Warns of lethal electrical hazards to prevent serious injury or fatality
• Alerts individuals to the presence of dangerous electrical risk
• Suitable for industrial sites, plant rooms, and electrical areas
• High contrast yellow and black design ensures clear visibility
• Available in durable materials for long-lasting performance
• Helps reinforce critical safety awareness in high-risk environments
Danger Of Death High Voltage Electrical Sign
Warns of the risk of fatal electric shock from high voltage sources.
• Alerts individuals to dangerous high voltage electrical hazards
• Suitable for electrical rooms, substations, plant areas and restricted zones
• Bold yellow and black design ensures high visibility and instant recognition
• Available in durable Rigid Plastic (1mm), Rigid Plastic (2mm) and Self Adhesive Vinyl
• Helps prevent serious injury or death by reinforcing safety awareness
Mains Switch Electrical Sign
Warns individuals of the location of the mains electrical switch and associated electrical hazard.
• Indicates the presence of a mains electrical switch and potential hazard
• Ideal for plant rooms, electrical cupboards, and commercial premises
• High-contrast yellow and black design ensures clear visibility
• Available in durable materials suitable for various environments
• Helps improve safety awareness around electrical control points
Danger Overhead Cables Height Limit Electrical Sign
Warn individuals of overhead electrical cables and height restrictions with this highly visible electrical hazard safety sign.
• Alerts people to overhead cable hazards and height restrictions
• Suitable for construction sites, industrial areas, and access routes
• High-contrast yellow and black design ensures clear visibility
• Available in Rigid Plastic (1mm) and Self Adhesive Vinyl
• Helps reduce the risk of vehicles or equipment striking live cables
Danger Overhead Live Wires Electrical Sign
Warns individuals of hazardous overhead live electrical wires to prevent serious injury or fatal accidents.
• 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 immediate recognition
• Available in durable materials for long-lasting performance
• Helps reduce risk of accidental contact with live wires
Danger Overhead Cables Electrical Sign
Warn individuals of dangerous overhead electrical cables with this highly visible electrical hazard safety sign.
• Alerts people to overhead electrical hazards
• Suitable for construction sites, industrial areas, and outdoor work zones
• High-contrast yellow and black design ensures clear visibility
• Available in Rigid Plastic (1mm), Rigid Plastic (2mm), Self Adhesive Vinyl, and Recyclable Correx ® (4mm)
• Helps reduce the risk of accidental contact with live cables
Danger High Voltage Cables Overhead Electrical Sign
Warn individuals of dangerous overhead high voltage cables with this highly visible electrical hazard safety sign.
• Alerts people to the presence of overhead high voltage cables
• Suitable for construction sites, industrial areas, and utility zones
• High-contrast yellow and black design ensures clear visibility
• Available in Rigid Plastic (1mm) and Self Adhesive Vinyl
• Helps reduce the risk of accidental contact with live electrical cables
Danger Switchgear Electrical Sign
Warns of electrical hazards associated with switchgear to prevent serious injury or death
• Clearly alerts individuals to the presence of dangerous electrical switchgear
• Ideal for use in plant rooms, electrical substations, and industrial facilities
• High-contrast design with bold text and symbol ensures maximum visibility
• Available in durable Rigid Plastic (1mm), Rigid Plastic (2mm) and Self Adhesive Vinyl
• Helps reduce risk of accidental contact with high-voltage equipment
Electrical Cupboard Sign
This multi-message safety sign warns of electrical hazards, restricts access, and instructs that the cupboard door must remain locked.
• Clearly identifies electrical hazard and restricted access area
• Ideal for plant rooms, maintenance areas, and electrical cupboards
• High-contrast colours and symbols for immediate recognition
• Durable construction suitable for long-term use
• Helps prevent unauthorised entry and enhances site safety
Danger High Voltage - No Admittance Authorised Personnel Only Sign
Warns of high voltage hazards and restricts access to authorised personnel only
• Clearly warns of electrical danger and restricted access
• Ideal for plant rooms, electrical areas, and restricted zones
• High-contrast colours and bold symbols for maximum visibility
• Durable construction suitable for long-term use
• Helps prevent unauthorised entry and reduce risk of injury
Danger Battery Charging Sign
Warn staff and visitors of battery charging hazards with this highly visible Danger Battery Charging safety sign.
• Warns people of hazards associated with battery charging areas
• Ideal for warehouses, workshops, plant rooms, and maintenance areas
• High-contrast yellow and black design ensures strong visibility and recognition
• Available in Rigid Plastic (1mm) and Self Adhesive Vinyl
• Helps improve safety awareness and reduce risks in charging zones
Warning Battery Charging In Progress Sign
Warn personnel of active battery charging hazards with this highly visible Warning Battery Charging In Progress sign.
• Alerts staff and visitors to battery charging activity and associated risks
• Ideal for warehouses, workshops, charging stations, and plant rooms
• High-visibility yellow and black design ensures quick recognition
• Available in Aluminium Composite (3mm), Rigid Plastic (1mm), Rigid Plastic (2mm), 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