Utility & Substation Signs

Substation Signs

High quality and fast turnaround safety signs can be used on fences, poles, pylons and anywhere there is a threat of danger.  Our substation identification products are made to meet the National Electrical Safety Code (NESC) which is standard in most states, has been adopted by the US Army Corp of Engineers, the US Department of Agriculture, the American Public Power Association and other similar groups.

  • Utilities
  • Generation
  • Transmission
  • Overhead
  • Utility Pole Cross Arm Signs
  • Pad Mounted Transformer Box
  • Distribution
  • Substations
  • Underground Safety Products
  • Utility Pole Marking Tags
  • Numbers & Letters

Substations contain a variety of equipment including switch gear, circuit breakers, transformers, protective equipment such as lighting arresters, capacitors and voltage regulators. We manufacture a variety of safety and regulatory signs for your project:

  • Do Not Climb Signs
  • Danger High Voltage
  • Lock Out Tags
  • Reflective Numbers & Letters
  • Transformer Labels
  • High Voltage Labels
  • Substation Name & Address Signs

ANSI Z535.2: Environmental and Facility Safety Signs
Environmental and facility safety signs are intended to communicate the presence of environmental hazards to the observer in the area. They are usually larger and contain less information than product safety signs and labels in order to be clearly understood at longer distances. Table 1: Classification and Use of Signal Words shows the signal words for the seven basic classifications used for environmental and facility safety signs. Safety tags and barricade tapes use only the first five classifications.

ANSI Z535.2: Environmental and Facility Safety Signs

Examples of Power Utility Safety Signs


Transmission Tower or Inside Electric Supply Station
The typical tower or station structure sign uses a DANGER signal word because it is located at a height that would present a fall hazard. Use the WARNING signal word if the sign is located at eye level, i.e., not more than 6 feet above grade.

The symbol helps to promote an understanding of both a fall hazard and an electrical hazard. Where space is available, the words should be used with the symbol, particularly with viewers who do not understand the words.


Electric Supply Station Perimeter Fence
The WARNING signal word is appropriate for a substation fence because there is little danger outside the fence. Some utilities use the electrified prohibitive hand symbol on substation entrance gate signs and the electrified falling man on the safety signs at other locations around the fence. However, most utilities adopt one symbol or the other for both types of perimeter signs. Both symbols test out with high comprehension.


Vault Door Where Access to Energized Parts is Not Immediate
This sign is appropriate for vaults that contain energized equipment, but that do not present an immediate hazard to employees who enter the vault. The DANGER signal word should be used – along with the message that it will shock, burn or cause death – if the hazard is immediately presented to the worker entering the vault.


Battery Charging Area
The NESC requires specific prohibition against sparks, smoking and flames in areas where hydrogen may accumulate during battery-charging operations. A DANGER signal word is appropriate in the battery-charging area itself, but a WARNING sign is appropriate outside the entrance to a battery room.


Blunt Trauma Slipping Hazard
The words “slippery when wet” may not be necessary in some environments, but there is usually enough space to include them on the sign. This symbol is the traditional symbol with the straight line under the sliding man. New versions sometimes use a more puddle-shaped black area under the foot. This is often used where condensation is a regular occurrence on a floor.


Process Interruption
Sometimes critical controls must be located in areas accessible to a variety of personnel in order to be used during maintenance procedures.


Safety Instructions for Shutdown Procedure
This message informs employees of safety procedures.


Safety Equipment Location and Safety Procedures for Eyewash
This message informs employees of the location of safety equipment and procedures for use of the equipment.


Barricade Tape
Barricade tapes may be red, orange or yellow with the DANGER, WARNING or CAUTION signal word, respectively, as appropriate for the type and immediacy of the potential hazard involved. While a DANGER tape is usually only used (a) to block off an area with a temporary access to energized parts behind doors opened for work or displaced for work or (b) to delineate the end of areas of substations that have been de-energized for work, they are sometimes used in public areas where emergency conditions have brought energized conductors or parts below normally required clearances.


Safety Tag for Lockout/Tagout Program
Safety tags for lockout/tagout programs required under 29 CFR 1910.147 should be oriented toward the specific issues at hand. It may be desirable to have several formats available to address either specific hazards or limitations to specific hazardous activity, but only one tag format shall be used for a specific hazard issue, such as one format for electric utility clearances per 29 CFR 1910.269(m), one for electric generation switching per 1910.269(d) and another identifiable format for steam. ANSI Z535 gives wide latitude to the user about the specifics of the messages when implementing a lockout/tagout procedure. However, OSHA 1910.269(m) requires the tag to state “employee at work.” These tags are attached with wire, cable ties or string of appropriate strength (see OSHA for more specifics about attachment strength and format) and often require the back side to have an alerting message in case the back side is turned toward the observer.

Placement of signs is dependent on avenues of approach, length of the fence, size of the sign and other factors. For more information, see ANSI Z535.2 Annex B and the note to Z535.2 section 11.1. This information is from “Meeting the Safety Sign Standards of ANSI Z535-2011, 2012 NESC, and 2012 OSHA Regulations for Power and Communication Utility Installations” available from the Power & Communication Utility Training Center.