Electrical Hazard Signs | Clarion safety Systems

Q: "What is the electrical hazard symbol?"

"The electrical hazard symbol is a black lightning bolt arrow inside a yellow triangle. It is standardized as symbol W012 in ISO 7010 and warns of the risk of electric shock."

Q: "Are high voltage signs required?"

"Yes, in many situations. OSHA 29 CFR 1910.335(b)(1) requires safety signs or tags to warn employees about electrical hazards, and the National Electrical Code requires warning signage at entrances to spaces with exposed energized parts and on specific equipment."

Q: "What is the difference between a danger and a warning electrical sign?"

"A danger electrical sign is used where contact will result in death or serious injury, such as exposed high voltage. A warning electrical sign covers serious electrical hazards where the risk is less immediate. The severity definitions come from the ANSI Z535 standards."

Electrical Hazard Signs for Shock, Arc Flash, and High Voltage Risks

Potential electrical hazards exist in every facility, which makes electrical hazard signs an essential part of every safety sign system. Unlike mechanical hazards, electrical risks are usually invisible until contact is made. Clarion Safety's electrical signs use the latest ISO-standardized symbols and OSHA/ANSI Z535 formats to identify shock, arc flash, and electrocution hazards before anyone gets close enough to be harmed. OSHA's electrical safe work practice rules at 29 CFR 1910.335(b)(1) require safety signs and tags to warn employees about electrical hazards, and our signs give you a standards-based way to meet that mandate. For equipment-mounted warnings, see our electrical hazard safety labels.

Electrical Safety Signs and Symbols, Explained

The core electrical hazard symbol is a black lightning bolt arrow inside a yellow triangle, standardized as symbol W012 in ISO 7010. It communicates the risk of electric shock without a single word, which matters in facilities with multi-lingual workforces and visitors. Clarion signs pair this symbol with signal words and message text so viewers understand the hazard, the consequence and how to avoid it. Signs are available across the full severity range, from danger for exposed high voltage to caution for lower-severity electrical risks.

High Voltage Signs and Danger Electrical Signs for Every Environment

High voltage signs mark electrical rooms, switchgear, transformers, fencing and enclosures where contact with energized parts can be fatal. The National Electrical Code (NFPA 70) requires field markings and warning signage for specific equipment and entrances to spaces with exposed live parts, and NFPA 70E adds arc flash warning requirements for equipment likely to be examined or serviced while energized. Clarion offers danger high voltage signs, arc flash signs and voltage-specific formats built for indoor and outdoor durability.

Compliance with OSHA, NFPA 70E and ANSI Z535

OSHA 29 CFR 1910.335(b)(1) requires safety signs, safety symbols or accident prevention tags to warn employees about electrical hazards
NFPA 70E requires arc flash warning labels and signage for equipment that may be worked on while energized
ANSI Z535.2 defines the sign formats, and ISO 7010 provides the graphical symbols recognized worldwide

Unsure which electrical signs your facility needs? A Clarion Safety consult can map your electrical hazards to the right signs and severity levels. Contact our team to get started.

Frequently Asked Questions About Electrical Hazard Signs

What is the electrical hazard symbol?

The electrical hazard symbol is a black lightning bolt arrow inside a yellow triangle. It is standardized as symbol W012 in ISO 7010 and warns of the risk of electric shock.

Are high voltage signs required?

Yes, in many situations. OSHA 29 CFR 1910.335(b)(1) requires safety signs or tags to warn employees about electrical hazards, and the National Electrical Code requires warning signage at entrances to spaces with exposed energized parts and on specific equipment.

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

A danger electrical sign is used where contact will result in death or serious injury, such as exposed high voltage. A warning electrical sign covers serious electrical hazards where the risk is less immediate. The severity definitions come from the ANSI Z535 standards.