A sign is marketing that runs on a circuit. When it's dark, half-lit, or flickering, it says something about the business that nobody intends. The electrical side of signage is straightforward, but it has a few requirements that catch people out — particularly the disconnect and the circuit it's supposed to be on.
Signs need their own circuit and a disconnect
Code requires an outlet or dedicated branch circuit for exterior signs, and an accessible disconnecting means within sight of the sign so a service tech can kill power safely. Retrofits often skip this and tap a nearby lighting circuit, which becomes a problem at inspection and a hazard at service time.
Sign types and what they need
- Channel letters — low-voltage LED modules with remote power supplies that need accessible, ventilated mounting.
- Cabinet and box signs — internal LED or fluorescent, typically one supply and one disconnect.
- Monument and pylon signs — a trenched, conduited feed from the building, plus a photocell or timer.
- Neon — high-voltage transformers with specific clearance and disconnect requirements.
Photocells, timers, and hours
Most businesses want the sign on at dusk and off at a set hour. A photocell paired with a timer does that reliably and keeps the sign from running all night. It's a small piece of hardware that pays for itself and stops the "why is our sign on at 3 a.m." question.
Building for the weather and the permit
Exterior work up here means weatherproof enclosures, in-use covers, UV-rated conduit, and penetrations sealed against wind-driven rain and freeze-thaw. Signage also typically needs both an electrical permit and a separate sign permit from the city or county, and Flagstaff's dark-sky requirements affect brightness and shielding — worth confirming before ordering the sign, not after.
Repairs and relamping
Most sign failures are a power supply, a bad LED module string, or water in an enclosure — not the whole sign. Converting older fluorescent or neon cabinets to LED usually cuts energy use sharply and eliminates most of the recurring service calls. Our signage installation and service covers new installs, conversions, and repairs.
When to bring in a professional
Whether it's a new storefront, a tenant improvement, or a sign that's been dark for a month, we'll handle the circuit, disconnect, controls, and permitting.
Call (928) 563-6237 to get it scheduled around your business hours.