LED Sign Frame, Mounting and Installation FAQ

LED Sign City signs are designed with built-in L-bracket mounting points located along the sides at the back of the sign. These brackets are included with every sign and are intended to simplify installation by allowing the sign to be securely attached to your structure.

If different-sized L-brackets are preferred for your installation, you can use these same mounting points to attach alternative brackets. The included diagram (see picture) shows exactly where these mounting points are positioned so you can plan your installation accordingly.

1. What size frame should I build for the LED sign?

Most customers use 1⅛" to 2" tubing for their frame.
The included L-brackets are made 3" long for greater flexibility in mounting.
If you prefer extra clearance, you can make the frame ½" larger on all sides for easier fitting and ventilation.
If you make the frame 1" larger all around, you may need spacers to close the gap.

2. Do I have to use the included brackets?

No. The provided L-brackets are for convenience, but you can make your own mounting points.
The sign also has removable X-brackets across the back, allowing additional mounting points if needed. See the picture below for reference

3. How far apart should I place two back-to-back signs?

Spacing depends on your tubing choice.
Signs can be mounted closer together, but keep in mind that power and data cables exit from the back.
Leave at least 8-10 inches of clearance for ventilation

4. Does the sign need to be fully recessed into the frame?

No. The back of the sign is around 3.45 inches thick, so it doesn’t need to be flush.
Front LED modules protrude slightly, so recess depth can vary.

5. What are the power requirements?

If You Have Single-Phase 110V–240V:

✅ Good to Go!
The sign is compatible with this voltage range and can be connected directly to the power source without any special adjustments.

If You Have 3-Phase 480V Power:

⚠ Step-Down Transformer Required
In facilities with 480V 3-phase service—common in industrial and commercial settings—a step-down transformer is required to bring the voltage into the acceptable 110V–263V single-phase range that the sign can safely use.

If You Have 277V Power (Typically from a 480Y/277V System):

✔ Line-to-Neutral Connection Needed
The sign can be powered using 277V as long as it is connected line-to-neutral, not line-to-line.
It is essential that the neutral is properly grounded and accessible at the panel for safe and stable operation.

6. Is the sign plug-in or hardwired?

The sign comes with a plug-in cable at the back.
The plug can be adapted for hardwiring if needed.

7. What’s included in the package?

Sign(s) with brackets.
Antenna and repeater for wireless connection (look for a white antenna labeled “Hand to Customer”).
All necessary cables for operation.