OSHA requires electrical hazards to be marked. 1910.335(b) calls for safety signs, tags, or barricades at electrical hazards, 1910.303(e) covers marking of equipment, and 1910.147 requires lockout/tagout during service. The National Electrical Code adds a warning sign at electrical-room entrances (NEC 110.27) and an arc-flash label (NEC 110.16). Our electrical hazard signs use the OSHA and ANSI format to meet those rules.
They cover each electrical risk. There are shock and electrocution hazard signs, high voltage and arc flash warnings, electrical panel and disconnect-before-servicing signs, authorized-personnel and keep-out postings, plus buried cable and overhead power line markers. Pick the sign that names the specific hazard present.
The different colors signal electrical hazard severity, set by ANSI Z535 and OSHA. Red DANGER marks an immediate, life-threatening hazard such as exposed live parts or high voltage. Orange WARNING marks a serious hazard that could cause death or injury. Yellow CAUTION marks a lesser hazard. The color tells a worker how severe the risk is before they read the words, so most live-electrical signs use the red danger header.
The lightning bolt, often paired with a hand or set inside a triangle, is the electric-shock hazard pictogram. It warns of the risk of shock or electrocution without words, so it works across languages. A shock hazard sign with the symbol pairs the bolt symbol with the message for the fastest recognition.
Post the sign where a worker sees it before contact. Put it on the panel, switchgear, or enclosure that holds the hazard, at the entrance to an electrical room, and along the route for buried or overhead lines. Mount at eye level, well-lit and unobstructed, and keep Do Not Block clearance at panels so the sign and the equipment stay accessible.
For a high voltage area, match the header to the severity and name the hazard. High voltage is a life-threatening hazard, so use a red DANGER sign, and add the voltage or a keep-out instruction where useful. See the full high voltage range for voltage-rated and keep-out options, and choose reflective aluminum for an outdoor substation or yard.
Yes. For substations and outdoor infrastructure, choose heavy-gauge aluminum with UV-resistant, reflective graphics that hold up for years and read at night. Bilingual English and Spanish versions reach every worker, and a custom sign adds your exact voltage or instruction. For a facility-wide or utility order, call our team at (800) 952-1457 (Mon – Fri, 8:00 am to 7:00 pm EST) or email customerservice@smartsign.com for a quote.
We make electrical hazard signs and labels that warn workers, contractors, and visitors away from live equipment that can cause shock, arc flash, or electrocution. Electrical injuries are among the most severe and often fatal workplace accidents, so a clear, posted warning is one of the most important controls you can put in place. These signs cover the full range of electrical risks, from shock and high voltage to arc flash, panels, and lockout reminders. Choose from stock danger and warning messages plus custom, reflective, and bilingual options on durable aluminum, plastic, and vinyl.
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