Run low-voltage bell wire along the baseboard and around door frames, and use insulated staples to hold the wire in place. Such bell wire is neither expensive nor unsightly. Always select a transformer with overload protection on the secondary or low-voltage wiring. Built-in protection of this type will cut off the current when trouble occurs in the transformer. Many homeowners enjoy the sound of chimes rather than doorbells or buzzers.
Chimes are attractive, and the sound is very pleasant.
Most chimes already provide separate tones for your front and back doors. This makes it easy to determine from which door the chime is activated. Chimes of various types are available for you to use. A four-note chime unit may sound single notes for the back door and as many as eight notes for the front door. The wiring diagram in Fig.