What is required for doorbells and chimes to operate safely on low voltage?

For doorbells and chimes to operate safely on low voltage, a transformer to reduce the voltage is essential. This transformer converts the standard household voltage, which is typically 120 volts, down to a lower voltage, such as 12 or 24 volts, which is safe for low-voltage devices.

Using a transformer ensures that the electrical components of the doorbell or chime operate without the risk of overheating or causing electric shock, as they are designed specifically to work at lower voltages. This also helps to comply with safety regulations that govern low-voltage installations, ensuring that these devices can be used reliably and safely in homes.

Other options, such as a low voltage switch or a battery backup, are not typically necessary for the basic operation of doorbells and chimes. While a direct connection to the power line would expose the system to standard voltage levels, which would be unsafe and damaging to low-voltage devices. The transformer is the critical component that makes low-voltage operation possible and safe.