For Bob
You were asking about XPDI3, or XPS, these
are both sold by X10Pro. You can see these
at
www.X10pro.com. The switching of these
switches occurs at the switch itself. The
line "black wire" feeds the switch,the
netrual "white wire" that comes off the
switch completes the circuit. The "blue
wire" goes to the load be it Inductive,
dimmer, resistive, low voltage or up to 4
amp motors. The switch does not really care
what the load is doing "figure of speech".
In a WS467 switch the line comes in & the
load wire goes to a incandescent bulb and
only a INCANDESCENT BULB not power saver
bulbs. If the bulb is bad, bad netruals,
vibrating filments, loose bulb the switch
will not turn on, as it needs a near perfect
netrual through the load to complete the
circuit. The "downfall" cost is double what
a WS467 is, and you need netruals "white
wires" in the box. The "upside" in my
opinion is a far more reliable and versatile
switch