At what level do you consider the noise excessive or detrimental to performance?
Any noise / any level.
Could be from anywhere. Best way to check (low on the WAF) is one circuit / breaker at a time.
Old transformers, UPSs, LED lighting, motors, TVs et al.
Just related to X10 do have a whole home filter at ingress of main electric. This involves removing the ground wire to the fuse panel. Best way to do this is to remove the meter outside first. The filter works fine for X10 noise but did not work for me relating to UPB noise.
Whole home X10 blocking filter.
One day neighbor installed an inground pool pump and it created a time scheduled UPB noise. This is where I ended up using a UPB repeater.
That said a couple of years later a lightning strike took out most of the neighbors appliances, pool pump, alarm et al and the neighbor cleaned up his electric professionally versus a mickey mouse "el cheapo" set up.
See in the picture how the neutral lead passes through the filter. It is not a clamp. You have to feed the neutral wire through the device.
IE: been tinkering with X10 since 1978. It was only automation used until the 2000's UPB automation.
Here using the old Elk X10 ESM-1 meter and leave it on next to the main server rack. Power to the rack is via 3 15AMP breakers in the panel. The UPB PIM and X10 PIMs are on separate breakers. The meter is connected to one of the 3 15Amp circuits that feed the server rack.
There is a separate section here for a Leviton 42" panel and HAI panels which is also on a separate circuit.
Last time saw noise on meter was right before AC compressor went out. My main furnace fan went out a few months ago but didn't see any noise from it.
What I did here was run conduit out of the bottom of the fuse panel and it goes to 4 - single duplex outlets with autonomous breakers. It is kind of a waste of circuits as there are no loads on these devices.
Have played a bunch here with the panel separating / adding circuits and feeds via existing conduit. If you are not familiar or feel confident about this stuff then it is better to hire an electrician.
does noise on one circuit affect the transmission of X-10 throughout the house, or only on that circuit?
The source of the noise can be on one circuit. The transmission of the noice can go to all circuits. This is where you can shut off one breaker at a time to see where the source(s) of noise are.
If you do not want to deal with any powerline noise then you can change over to using ZWave or Zigbee inwall switches connected to a Leviton HAI ZWave PIM or Leviton HAI Zigbee PIM. The ZWave PIM is just a serially connected device to your panel. The Zigbee ZIM is a powered serial device plugged in to your panel.
Here went from in wall X10 to in wall UPB switches a few years ago. I have tinkered with in wall ZWave / Zigbee switches and devices.
Doing a second house with all wireless / MQTT because it is easy and cheap Ring Alarm, WiFi switches and Alexa devices.
Just purchased "el cheapo" GoSund in wall dimmers for around $20 (or less) a piece. Way different than purchasing 3 UPB in Wall switches.
I really have never been much of a wireless automation person and still prefer my wired OmniPro alarm sensors.
There are a few Cocoontech Leviton / HAI panel users that have switched out of power line going to ZWave or Zigbee.
You can combine and use X10, UPB, ZWave and Zigbee transitioning over a room at a time or floor at a time. Here configured a ZWave / Zigbee PIMs and tested devices but never switched my in wall switches from UPB to ZWave or Zigbee.
You cannot utilize any ZWave / Zigbee sensors (temperature, PIRs, contact switches) with the panel.
