The sensors (window, motion, and remotes) are all RF at around 310mHz which are not susceptible to power line noise. But X10 was known for RF range problems. The plugin modules for lights, alarms, appliance modules, etc are susceptible to power line noise . You may need additional repeater (XPCR) and line filters (XPPF and XPF) to get powerline signal to the light and appliance modules and the plugin “powerhorns”. If you have a small place like a small apartment, X10 might serve you well, but a 2000sq ft home, expect to throw more money at it to get it to work reliably. X10 user since 1979 before there was anything else.
The sensors (window, motion, and remotes) are all RF at around 310mHz which are not susceptible to power line noise. But X10 was known for RF range problems. The plugin modules for lights, alarms, appliance modules, etc are susceptible to power line noise . You may need additional repeater (XPCR) and line filters (XPPF and XPF) to get powerline signal to the light and appliance modules and the plugin “powerhorns”. If you have a small place like a small apartment, X10 might serve you well, but a 2000sq ft home, expect to throw more money at it to get it to work reliably. X10 user since 1979 before there was anything else.