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
Product Overview
This Danger Mains Voltage Electrical Sign clearly warns people of dangerous mains electrical voltage and the risk of serious injury from contact. Featuring a prominent electrical hazard symbol with bold Danger Mains Voltage text, it provides a highly visible warning to encourage caution around electrical hazards.
Where to Use
- Industrial sites
- Plant rooms
- Electrical areas
- Electrical equipment locations
- Areas with mains voltage hazards
Key Features
- Clearly warns of dangerous mains voltage
- Recognisable electrical hazard symbol
- High-visibility yellow and black design
- Bold Danger Mains Voltage message
- Helps reduce the risk of electric shock
Materials & Options
- Rigid Plastic (1mm)
- Rigid Plastic 1mm (Self Adhesive Back)
- Rigid Plastic (2mm)
- Rigid Plastic 2mm (Self Adhesive Back)
- Self Adhesive Vinyl
Compliance
This sign supports compliance with UK health and safety regulations, including:
- Health and Safety at Work etc. Act 1974
- Safety Signs and Signals Regulations 1996
Frequently Asked Questions
Where should this sign be installed?
Install the sign in a clearly visible position near plant rooms, electrical equipment or other areas where mains voltage hazards are present.
Is this sign suitable for outdoor use?
Suitability for outdoor use depends on the selected material and conditions at the installation location.
What does this sign indicate?
This sign indicates the presence of dangerous mains voltage and warns people to take appropriate care around the electrical hazard.
Trade Discounts
Rainbow Safety supplies safety signs to trade professionals across the UK.
Our trade customers include:
- Fire safety service companies
- Fire risk assessors and safety consultants
- Electrical wholesalers
- Facilities management companies
Approved trade customers receive:
- Preferential trade discounts
- Better margins for reselling safety signs
- Marketing support to help you sell more signs
- Access to our full range of safety signs
With the support and marketing tools provided, our sales have grown to over £3,000 per month.
Fire extinguisher servicing margins are not what they used to be, so supplying safety signs has become a valuable additional revenue stream for our business. On one warehouse safety survey alone we invoiced £5,100 on a single order.
We can now compete with internet prices and still make a healthy margin.
We were regularly asked to supply safety signs, but struggled to compete with internet prices while maintaining a worthwhile margin.
Working with Rainbow Safety has changed that. We can now offer our customers a competitive range of safety signs while still making a healthy margin for our business.
Loyalty Rewards
Rainbow Safety rewards regular customers across the UK who order safety signs on an ongoing basis.
- Schools and colleges
- Facilities management companies
- Contractors and maintenance teams
- Offices and commercial premises
- Preferential pricing for regular customers
- Free design service for custom safety signs
- Access to exclusive promotional offers
- Dedicated account manager if required
“Rainbow Safety has become our go-to supplier for safety signs.”
We regularly need safety signs for maintenance work, refurbishments and ongoing compliance updates. Since ordering from Rainbow Safety, the process has been straightforward, reliable and cost-effective.
The loyalty rewards and special offers have helped us save money across repeat orders, while the wide product range means we can usually source everything we need in one place.
Fast ordering, consistent quality and ongoing rewards have made Rainbow Safety a valuable supplier for our business.
Reviews
We attached the sign to our mains switch cupboard in Tauranga. The warning is clear and the sign looks professional. My only caveat - if you place it too low or behind clutter it could be overlooked, which defeats the purpose. For maximum safety, I’d recommend fixing it at eye‑level and keeping the area around the sign clean and visible. Otherwise, a good, functional danger sign
We bought the self‑adhesive plastic version for a small maintenance room in Hamilton. Application was simple and the sign looked neat. However, compared with heavy‑duty metal signage I’ve used before, this feels a bit light. I’d be cautious about using it outdoors long‑term or in places with heavy foot traffic or equipment nearby. For indoor or protected use though — solid enough.
I ordered this sign for our small woodworking shop near Wellington. The wording and symbol are unmistakable and easy to read from a few metres away. Installation was straightforward — we screwed it onto the wall beside the main switch. It gives a clear warning to anyone who might be tempted to mess with the panel, which helps keep safety awareness high. I’m satisfied with the quality and clarity — a great safety addition.
We installed this Danger Mains Voltage sign on our electrical distribution board at our shed in Auckland. The classic yellow and black design with the hazard lightning‑bolt icon grabs attention immediately — exactly what’s needed when there’s live mains electricity. The rigid‑plastic version we chose feels solid and weather‑resistant. Even after weeks with occasional humidity and dust, the sign remains firmly fixed and the print is crisp. Definitely a simple but essential safety measure — worth adding to any place with mains wiring.
