Safety Label Supply produces durable, OSHA-compliant signage used by electricians, contractors, and plant managers across the country. Every high voltage sign is printed and finished in the United States using industrial materials designed for reliability. Our focus is simple: clear communication that saves time, avoids citations, and keeps your crew safe around live power.
Frequently Asked Questions
Do these meet the labeling requirements for NFPA 70E and OSHA 1910.145?
Yes. The layouts follow both standards. Signal words, colors, and icons match the ANSI Z535 format that inspectors expect to see in substations and switchgear rooms.
What voltage levels should be marked as “High Voltage”?
Most facilities label anything above 480 volts as “High Voltage.” For distribution gear, 240 volts and above usually gets a WARNING or CAUTION depending on your internal electrical safety program.
Are aluminum or vinyl signs better for electrical gear?
It depends on where you mount them. Aluminum works best for outdoor switchgear, transformers, and generator enclosures that see direct weather. Vinyl labels are better for indoor control panels and disconnects where surface temperatures are stable.
Do you offer reflective aluminum for perimeter fencing or outdoor substations?
Yes. Reflective aluminum improves visibility at night or in poor weather. It’s common for substations, solar farms, and utility fences that require 24-hour hazard identification.
Can you print our site’s lockout or arc flash warning on the same sign?
Yes. Many safety teams combine “High Voltage” with lockout reminders or PPE notices. You can upload your layout or request a combined design so it passes both electrical and safety audits.
Can you pre-drill aluminum signs to fit existing panels?
Yes. Just send your hole spacing or a quick photo of your existing mounting pattern. We’ll cut and drill to match so you can replace signs without drilling new holes.
Do inspectors care if the voltage number is printed on the sign?
They do. Most EHS and electrical inspectors expect to see the actual voltage listed on or near the equipment. We can print specific values like “480 VOLTS” or “4160 VOLTS” right into the artwork so there’s no confusio
What’s the best cleaning method for long-term maintenance?
Use a mild detergent or alcohol wipe to remove dirt and oil. Avoid harsh solvents. For vinyl signs, wipe gently with a microfiber cloth to preserve the laminate.
