Illuminated signs are a great way to attract attention, whether they’re used for a storefront, office, or business display. But behind every bright sign, there is important electrical work that makes it safe and reliable. Many people see the glowing lights but don’t realize how much planning, wiring, and installation go into making the sign work properly.
In this blog, we will explain the electrical work required for illuminated signs, so you understand the basic steps, safety needs, and why professional help is important.
Power Supply and Wiring
Every illuminated sign needs a safe power source. Many modern LED signs use 12–24V, but some signs still require 120V or high-voltage power, depending on the lighting type. These require a power supply or transformer to convert normal building electricity into the right voltage.
Installation begins by bringing AC power from the building to a junction box where the sign’s power supply will sit. This may involve drilling, running conduit, or routing wires through walls. Electricians bring power to the junction box, and the sign installer completes the wiring from the power supply to the sign.
From the power supply, low-voltage wires run to the sign and must be protected, neatly installed, and properly insulated. Outdoor signs require weatherproof wiring and connectors to prevent moisture damage.
Large signs or signs with many LED modules may need more than one power supply and a dedicated electrical circuit to prevent overloads.
Installing Internal Electrical Components
LED signs use LED modules and LED drivers, neon signs use neon tubes and high-voltage transformers. These need to be mounted properly so the particular sign lights up evenly and works for years.
Signs are mounted using brackets, raceways, stud mounts, backer plates, or pole/monument structures. After the sign is secured, the installer connects the LED modules or neon components. LEDs must be wired with correct polarity to prevent flickering or failures.
Many signs have separate connection points that use weatherproof connectors for outdoor safety. Proper cable management keeps the wiring protected and tidy
Controls and Switch Options
Illuminated signs need a way to turn on and off. This can be a simple wall switch, a timer, or a smart controller that you can manage remotely.
The type of control depends on what the business owner wants. A timer can automatically turn the sign on at sunset and off at closing time. Smart controls allow remote operation, which is helpful for businesses with multiple signs. Electricians integrate the chosen control into the wiring so everything works smoothly and safely.
Safety and Code Compliance
Electrical work for illuminated signs must follow local electrical codes. This ensures safety and prevents fire or shock risks. Outdoor signs need extra protection, such as proper sealing, waterproof connectors, and grounding.
Note that electrical signs must follow UL 48 standards to pass inspections. Customers should expect permits and electrical inspections before a sign can be legally installed and powered.
Final Word
Illuminated signs may look simple from the outside, but the electrical work behind them is detailed and important. Proper wiring, safe power supply installation, and careful mounting ensure that the sign works well and lasts for years.
Hire professional help at Southland Signs or call us at (832) 582-8339 to install signs that involve electrical work!