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[MartinEllis]

Hi, I'm relatively new to X10. I have a house with 3 phase power, house circuits are wired/split across phases and neutral. Question is can I use separate X10 transmitters on each phase or do I need a 3 phase coupler. I ask because I already have the transmitters and wondering if this will achieve the same result?

Cheers!,
Martin

[Brian H]

Your house is three phase?
Like three Hot Lines, a Neutral and a safety ground? 208 volts between any two Lines?

The X10 protocol has the power line signal sent from a transmitter three times. One to match each phases zero crossing. So if the signal makes it from one phase to the next. You maybe be able to control devices on each phase with a controller on another phase.

A three phase coupler repeater maybe all you need. I believe the ACT CR134 is three phase.
Some of the passive couplers can also be used in three phase.

[MartinEllis]

Brian,

Thanks for the quick reply!, I should clarify, I'm in Australia, Voltage on my 3 phase is 240 between any phase and neutral, 415 between phases - probabley the same as the UK.  Ground is also wired to neutral here. My controller is an Omnipro II pro, has options for 3 phase X10. Going to research this a little more. X10 stuff is really expensive here, I move from the US hence my OmniPro. If I can get away with the 240v Transmitter on each phase it would be perfect.. ! Anyone confirm this is possible?

Martin - from down under.

[Brian H]

Thanks for the added information.
That may get more help for you. Now that we know your location and voltages.

[JeffVolp]

I believe most X10 transmitters output all three phases.  That allows you to use a single transmitter with two phase couplers to propagate that signal to the other phases.  I suppose having a transmitter on each phase should also work.

The XTB-III transmits all three phases, and has three coupling networks good for 240V.  Because it has a single processing channel, it cannot be used as a repeater except for special cases.

Jeff

[AussieJohn73]

Hi,

The best bet is a 3 phase coupler.  They are not cheap (the cheapest I found was here http://www.envioustechnology.com.au/products/product-detail.php?ID=71 in Australia).  Mine works perfectly, I hope this helps.

[luke03]

You could also have three receivers, one for each phase.  I assume your transmitter is the RF one?