How to Install an Illuminated Sign: Guide for Channel Letters, Light Boxes and LED Neon

A good installation goes a long way toward how premium your sign looks in the end. The good news: with the right preparation, any experienced installer can do it. This guide shows you what's in the box, how installation works and which mistakes to avoid.

In short

To install channel letters: turn off the power, tape the full-size mounting template to the wall with a level, drill the mounting and wire holes, set the threaded studs with adhesive, fit the letters and have a licensed electrician make the connection. LED neon signs with a plug simply hang up and plug in.

What's in the box

  • Full-size (1:1) mounting template: shows every mounting hole and every wire penetration.
  • Wiring diagram: shows how the letters, power supply and electrical feed connect.
  • Installation notes for your sign.
  • Mounting hardware: threaded studs, washers and nuts for letters; stand-offs or a hanging kit for LED neon.

Your installer chooses anchors on site, because they depend on the surface: concrete, brick and drywall each need different ones.

Safety first

  • Electrical work must be done by a licensed electrician, in line with the NEC and your local code.
  • Turn off the power before installation. After connecting, check every connection before switching back on.
  • Only use listed wire and connectors.
  • Put the power supply somewhere dry and ventilated, never sealed airtight.
  • Don't open or modify the sign.

Tools

A drill with suitable bits, screwdriver, level, tape measure, painter's tape, construction adhesive or silicone and, for a facade, a safe ladder or lift.

Installing channel letters: step by step

  1. Set the position. Measure the area and mark the center. Work out where the electrical feed is and where the power supply will go.
  2. Fix the template. Tape the 1:1 mounting template to the wall and level it. Step back a few paces and check the position again from a distance.
  3. Mark and drill. Mark the mounting holes and wire penetrations through the template, remove it and drill. Mounting holes should be about 2 mm (roughly 1/16 in) wider than the studs so the adhesive has room. Wire holes need to go right through the wall to the electrical feed.
  4. Screw in the studs. Screw the studs into the threads on the back of the letters.
  5. Feed the wires. Pass each letter's wire through the holes in the wall.
  6. Glue and fit. Put adhesive or silicone into the holes and on the studs, fit the letters and support them while the adhesive cures. On halo-lit letters, the stand-offs set a wall gap of about 2–4 cm (1–1.5 in).
  7. Connect. The electrician connects the letters to the power supply and the building circuit following the wiring diagram, checks every connection and only then switches on.

If your letters sit on a raceway, the raceway is fixed to the wall and the wiring runs inside it to a single connection point. That means fewer holes and is often the better option on EIFS.

Installing a light box or blade sign

Light boxes are fixed to the wall with brackets or through the back panel; blade signs with a wall bracket. Both are heavier than individual letters, so the anchors belong in solid masonry or concrete. On EIFS you need special anchors that carry the load through the insulation to the structure. The electrical connection is a job for the electrician here too.

Hanging an LED neon sign

LED neon signs are the easiest, because they come with a plug-in adapter with a US plug. Depending on the build, you screw them to the wall on stand-offs, hang them on wires or fix them with adhesive mounting. Plan for the cable: it's about 6.5 ft (2 m) long as standard, so an outlet should be within reach. Longer cables are available on request.

The most common installation mistakes

  • Template not leveled. Even a few millimeters show on a long line of lettering.
  • Holes drilled too tight, leaving no room for adhesive.
  • Wire penetrations forgotten or not drilled all the way through.
  • Power supply installed in a closed, damp or unventilated cavity.
  • Sign cleaned with solvents or harsh cleaners.

Care after installation

  • Clean with a soft, slightly damp cloth, without solvents.
  • Keep indoor signs away from constant moisture.
  • If the sign isn't used for a while, switch it on for one to two hours every two to three weeks. That keeps the electronics in good condition.

No installer?

Our signs come with everything a sign installer needs. If you don't have one, we can help you find an installer near you.

See which sign type suits your location in our overview of all sign types. Details on size and installation are on our channel letters, light box signs, blade signs and LED neon signs pages.

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