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Signage for Identifying Electrical Hazards


In the world of electricity, hazards can lurk unseen, hidden amidst a maze of cables and wires. A single oversight or neglect of proper electrical safety signage could lead to devastating consequences. At LEM Products, we make your safety our top priority. Our mission is to eliminate the risk with electrical wiring and cables, making workplaces safer with high-quality, durable, and clear safety signage.

Our signs serve as a constant reminder of the invisible dangers that exist in any environment where electricity is at play, providing clear warnings and instructions to protect your most valuable asset — your people. 

LEM electrical markers are essential for marking wire and cable. They are used to identify wires and wire marking components for wire and cable installation, repair, and safety. 

Take a closer look at our selection of electrical safety signs and markers below and find the one ideal for your operations:

  • Arc Flash Labels
  • Wire Markers
  • Cable Markers
  • Voltage Markers
  • ANSI & NEC compliance
  • Private Branding


Arc Flash Labels

Wire Markers

Cable Markers

Voltage Markers

ANSI & NEC compliance

Private Branding

Arc Flash Labels

Arc Flash labels are placed on electrical panels and switchboards to warn about hazards when working on energized electrical equipment.

  • Pressure-sensitive vinyl with aggressive acrylic adhesive
  • Meets the most current ANSI standards for safety labeling
  • Compliant with NEC standard 110.06 Flash Protection

Wire Markers and Cable Markers

Industry-standard wire markers and cable markers, as manufactured by LEM Products, Inc., are made of durable vinyl-coated cloth with an aggressive adhesive that firmly wraps around the wire or cable, providing clear and durable identification.

  • Available as wire marker cards or bound in wire marker books
  • Made of vinyl-impregnated cloth with a permanent adhesive
  • Wire markers identify the wire but do not denote voltage
  • Each wire marker book contains 450 wire markers and 450 matching terminal strips
  • Legends include solid and sequential numbers, letters, symbols, and the solid NEMA colors
  • Printed with permanent black ink
  • Markers will not slip or slide.

Self-Laminating Wire Markers

Self-laminating vinyl wire markers provide permanent protection to the information once the clear portion of the marker is wrapped around the information printed on the white tab portion of the marker. These self-laminating markers are useful when small quantities of special legends are required. The bright white portion of the marker will accept a permanent marker, pen, or rubber stamp.


The LEM Custom Private Brand Wire Marker Book program offers you the opportunity to market YOUR Company Brand on your custom wire marker book covers and can provide cross selling information on the inside of the wire marker book cover.

Voltage Markers

Voltage markers alert technicians and employees to potential workplace electrical hazards. They are used to identify voltages on conduit, power and distribution panels, electrical components and machinery, and control panels and raceways.

  • Compliant with ASME (ANSI) standard ZG3.22
  • Bright orange background with high-contrast Black legend
  • Resistant to oil, grease, and water
  • Aggressive adhesive
  • Flexible vinyl material for conformable industrial applications
  • Available in three sizes: 2.25 x 9”, 1.125 x 4.5”, 0.5 x 2.25”

Conduit Markers

Used for conduit and cable identification and electrical systems, preformed Snap-Wrap conduit markers are designed to quickly snap around cable or conduit up to 3.25” in diameter, without the use of mechanical fasteners. All markers are black characters on orange rigid pre-curled PVC material with memory.

Why Electrical Warning Signs Are a Critical Addition to Your Property

Electrical hazards are unique in that they often remain unseen until it’s too late. Unlike other risks, they don’t announce themselves with visible cues or warning signs. That’s where electrical safety signage steps in. These signs act as the critical first line of defense, alerting people to potential dangers before any harm can occur.

Whether it’s indicating the presence of live wires, highlighting high voltage areas, or providing instructions for safe handling procedures, these signs are important for preventing accidents and ensuring overall safety. They create awareness and instill a culture of caution, reminding everyone in the vicinity to proceed with care when dealing with electricity.

By investing in clear, durable, and properly placed electrical warning signs, you’re not only meeting regulatory compliance but also demonstrating a commitment to safety.

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Electrical Safety Sign Regulations for Wire and Cable

According to OSHA, appropriate warning signs must be promptly placed in areas where covers of manholes, handholes, or vaults are removed, indicating the presence of underground electrical cables. Flexible cords and cables should be protected by bushings or fittings when passing through holes in covers, outlet boxes, or similar enclosures. Moreover, worn or frayed electric cords or cables should not be used, and extension cords should not be fastened with staples, hung from nails, or suspended by wire.

The NEC also outlines specific rules for electrical signage. For instance, the wiring for a sign must terminate at the sign or outline lighting enclosure, box, or conduit body. Various NFPA 70 signs that are both OSHA and ANSI compliant are available, effectively communicating the hazards outlined by the NEC and NFPA.

Electrical Safety Signage Commonly Asked Questions

What are some common electrical hazards faced at the workplace?

The most common electrical hazards in the workplace include exposed live parts, inadequate wiring, overloaded circuits, damaged power tools, and the improper use of extension cords. These hazards can lead to electric shocks, burns, and even electrocution if not properly managed.

Where should electrical safety signs be placed?

Electrical safety signs should be prominently displayed at all points of electrical hazards, such as near power lines, breaker panels, fuse boxes, and outlets. They should also be placed at entrances to high-voltage areas and anywhere else where workers might come into contact with electrical systems.

How often should electrical safety signs be replaced?

The frequency of replacing electrical safety signs depends on their condition and visibility. If a sign becomes faded, damaged, or is no longer clearly visible, it should be replaced immediately. As a rule of thumb, regular inspections should be carried out to make sure that all signs are in good condition and serving their purpose effectively.

What information should be included on an electrical safety sign?

An effective electrical safety sign should clearly indicate the nature of the hazard, the consequences of interaction with the hazard, and instructions for safe behavior. This could include warnings like “High Voltage,” “Keep Out,” or “Authorized Personnel Only.” In some cases, the sign may also include details about the voltage level or specific safety equipment required.

Do electrical safety signs need to be illuminated?

While not always required, illuminated signs can enhance visibility, especially in low-light conditions or during power outages. However, the need for illumination largely depends on the specific location and nature of the hazard. Always refer to local regulations and guidelines to ensure compliance.

What size should an electrical safety sign be?

The size of an electrical safety sign should be proportionate to its viewing distance. For example, a sign viewed from 20 feet away should be larger than one viewed from 10 feet away. The objective is to ensure that the sign is easily readable and visible from all relevant angles. Specific size requirements can vary based on local regulations, so it’s always best to consult these when designing your signage.

What other applications does LEM products support?

LEM products provide support and tools for plenty of industries and applications, including:

Invest in LEM Products’ electrical hazard safety signage today. Let us lead your organization to the success it demands by prioritizing safety first and foremost. Leverage our products in various industries and organizations that demand electrical safety.