The unit can be wired or plugged into a power outlet. I'm leaning towards the outlet option for now, since it seems more versatile. A garage door opener requires a simple circuit of 15 or 20 amps and 120 volts. This circuit must be in a GFCI outlet protected by itself from the electrical panel.
Most garage door openers must be plugged in and not wired. Cutting the cable at the end of the opening unit will definitely void your warranty. Since you leave the interior garage door open, you'll need to program the remote controls you use to operate your garage doors on the different floors of the house. You'll need to invert the center of the opener body with the motor and cut a cutout in the motor cover plate for the opener to work with the correct cables.
Once you program your remote control, you can use this handy small module to connect it to a separate circuit on the garage side of the house, so that when you're in the house on your respective floor you can press the remote control and the door will open. A wired sensor is recommended, but if it doesn't fit your plan, you can jump the back of the sensor to the back of the door opener itself. When you receive your garage door opener, it will be a constant challenge to place it in a safe and secure location. There are garage door cables that use a transceiver that connects the opener unit to the garage door wiring.
The garage door opener is connected to a transformer that will energize the negative end of the cable from the opener. Usually, 3 cables, one for each security sensor at the bottom of the door and one for the keyboard or switch. But if you want the sensor to close the door, you must open it first so that it opens when the engine is running. The biggest problems with garage door openers are usually due to the high power load and the various voltages required to operate all functions of the opener.
In most cases, you'll need to go to the garage door opener manufacturer's website and look for the garage door opener data sheet. In a new installation, it must be placed in the dead spot where the opener will be mounted, exactly 10 feet from the outer wall where the door will be installed. The other end of these cables runs through a series of jumper cables into a power outlet where the garage door opens. The garage door wall switch (also known as a “remote starter”) is a low-voltage relay that consists of three segments, the solenoid (the button that is pressed) and two contacts that allow current to flow in and out of the solenoid.
Connect the garage door opener to a power outlet (15 or 20 amps) in the switch box located outside the garage door.