Garage door openers have become so commonplace, it's hard to imagine living without them. At the same time, they've advanced in technology, leading to models that operate more smoothly, without jamming. Many openers work on a chain-driven system, where the door is pulled up by a chain connected to the motor. Other types use a screw drive, which employs a long-threaded screw instead of a chain. Wiring is simple: a garage door opener can plug into any standard receptacle. Unlike the other outlets in a garage, the garage door receptacle is not required to be g-f-c-i. But for extra protection, you may want to use one. There are several different options for opening and closing your door. In addition to the standard remote, you can equip the door with an entry keypad, that requires a special code. Still others can be triggered by a transmitter hooked up to your car. As you drive up, the signal opens your door, and even turns on lights inside the house. All doors today are equipped with an automatic stop feature, which halts the door when anything gets in its path.
