One wire leads to the doorbell transformer and the other wire leads to the doorbell base (chimes). Once you are sure that the power is off, remove the wire nuts and wires connecting the transformer to the electrical circuit. If you are installing a new doorbell, you will need to run the low voltage wire to the door bell and the chime. Fish the single strand of bell wire from the transformer to the location of the doorbell base. You might want to use a voltmeter to verify this, but generally, the hot wire will be black, the neutral wire will be white, and the bare copper is most likely the ground. Inexpensive wireless units start at about $15 (a basic door button and plug-in chime box) and can cost more than $500 for smart units. Use it to try out great new products and services nationwide without paying full pricewine, food delivery, clothing and more. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/6\/65\/Install-a-Doorbell-Step-8-Version-3.jpg\/v4-460px-Install-a-Doorbell-Step-8-Version-3.jpg","bigUrl":"\/images\/thumb\/6\/65\/Install-a-Doorbell-Step-8-Version-3.jpg\/aid1380754-v4-728px-Install-a-Doorbell-Step-8-Version-3.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"
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how to install a doorbell transformer