The NESC requires a safety sign at each entrance to an electric supply station and on each side of the fence. Lordon manufactures a wide variety of Substation Safety and Identification Signage – Choose from a selection of standard Aluminum, Polycarbonate or Porcelain Warning/Danger Signs, or have your sign customized to include your logo, colors, text, images, etc. Styles include: Printed, Reverse Print, Polycarbonate, and Reflective. Standard sizes are 7×10 or 10×14. Custom sizes available.