High voltage warning signs.

Field-proven signage for substations, switchyards, and power infrastructure. Built to outlast the assets they protect.

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Built for Energy Infrastructure.

Identimark manufactures high voltage warning signs on our field-proven substrate. Graphics are embedded below the surface. Protected from sun, abrasion, and chemical attack. Every sign carries U3's lifetime guarantee.

Independently tested for 32+ years across Australian and New Zealand power industry infrastructure. Our signs remain legible long after standard materials have failed.

High voltage danger sign

High Voltage Signage Range.

Standard and custom high voltage signs built on our field-proven substrate. Made to last the life of your assets.

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Danger High Voltage — Standard identification for high voltage installations.

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Danger High Voltage — Keep Out — Perimeter and access restriction signage for substations and switchyards.

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Danger High Voltage — Authorised Personnel Only — Controlled access points for qualified electrical workers.

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Danger High Voltage Overhead — Overhead power line awareness for work zones and road crossings.

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Warning High Voltage — For applications where the warning classification applies.

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Voltage-Specific Signs — Custom signs specifying exact ratings for your installation.

Built for Energy Environments.

High voltage signage for every asset class. From local distribution through to major transmission.

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Substations and Switchyards
Every access point needs danger high voltage signage. Perimeter gates, building entries, equipment enclosures, switchgear bays. Substations are among the harshest environments for signage. Direct sun, temperature extremes, and airborne contaminants. Our signs do not fade, crack, or peel.

Transmission and Distribution
Towers, pole-mounted transformers, pad-mounted transformers, cable termination points. Overhead power line signage is critical at road crossings, construction zones, and farm access points where non-electrical workers encounter power infrastructure.

Generation and Industrial
Power stations, wind farms, solar farms, and industrial plants all contain high voltage equipment. Data centres with high-powered electrical distribution need compliant signage at every access point.

Who we work with.

Transgrid 405x124-1
Energex 405x124
Ergon 405x124
Northpower 405x124
ElectraNet 405x124
Connetics 405x124
Ausgrid 405x124
Unison 405x124 (1)
Featured projects

Transpower Tower Signage.

New Zealand

Identimark collaborated with Transpower’s engineering team to design a full range of U3 tower signage. A cost analysis revealed millions in potential savings, and a formal standards update followed.

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Explore the range.

FAQs.

How long do standard high voltage signs last outdoors?

Plastic, vinyl, and painted metal signs typically fade, crack, or peel within two to five years. Identimark signs are independently tested with 32+ years of field-proven performance. Installations from the early 1990s are still in service and fully legible.

What is the difference between a danger sign and a warning sign?

A danger sign is used when the hazard could kill on contact. A warning sign applies where the hazard is serious but not immediately fatal. Your electrical engineer or safety assessor determines which applies at each location.

Can high voltage signs be customised with specific voltage ratings?

Yes. We manufacture custom signs with exact voltage ratings for your installation. We also include facility names, asset identifiers, and emergency contacts. All custom signs carry the same lifetime guarantee.

Do I need reflective high voltage signs?

Reflective signs are required wherever signs must be readable in low light or at night. Substations, switchyards, and any location with shift workers or after-hours access typically need reflective versions.

Can you handle large rollouts across a network?

Yes. We manufacture network-wide signage programs covering hundreds or thousands of signs to a single specification. One supplier, consistent quality, delivered in bulk. Talk to us about your project.