Warning - Arc Flash and Shock Hazard De-energize unit Before Removing Cover - Safety Signs by Caledonia Signs

Inform personnel that electrical equipment poses a significant risk of arc flash and electric shock. Removing covers from energized units can result in severe burns, electrical shock, or fatal injuries. The sign instructs workers to ensure that the equipment is fully de-energized, locked out, and verified safe before any maintenance or inspection is performed.

This sign should be placed on high-voltage electrical panels, switchgear, motor control centres, transformer enclosures, and other energized equipment where accessing internal components is required. It is most effective when attached directly to the unit’s cover or nearby on the equipment housing, ensuring that personnel are immediately aware of the requirement before attempting to open it. Placement at eye level or near handles and access points increases visibility and compliance.

The wording “De-energize Unit Before Removing Cover” provides a clear, actionable instruction, while “Arc Flash and Shock Hazard” highlights the severity of the risk. This combination ensures that workers, maintenance personnel, and contractors understand both the hazard and the critical safety procedure, reinforcing adherence to electrical safety protocols such as lockout/tagout and the use of personal protective equipment (PPE).

Overall, using this sign is crucial for preventing serious injuries or fatalities, maintaining compliance with occupational health and safety regulations, and promoting a strong culture of electrical safety in industrial, commercial, and utility environments. It clearly communicates the need for proper energy isolation before accessing energized equipment.

Materials Explained

Below is a more detailed description of the materials this particular safety sign is available in. Helping you decide which sign option is most suitable for your application.

Rigid Plastic: This lightweight, gloss white PVC is resistant to weather, moisture, chemicals, and general wear and tear, making it suitable for harsh environments. Its smooth, solid surface allows for crisp printing of text and graphics, enhancing readability and visual impact. Businesses who choose Rigid Plastic signs benefit from fewer replacements and minimal maintenance, making it a practical investment for reliable and effective safety signs.

Self-Adhesive Vinyl: Self-adhesive vinyl is easy to apply and it is budget-friendly. Its adhesive backing allows for easy application to a variety of surfaces such as glass, metal, plastic, and painted walls, which simplifies installation and reduces setup time. Self-adhesive vinyl provides a clean, professional finish that suits many indoor environments including offices, retail, industrial sites, and vehicles. It is more affordable than many other material types and allows for custom shapes, colours, and graphics.