Electrical doodad's Question

[daplatapus]

Originally Posted by makana

http://en.wikipedia.org/wiki/Solid-state_relay

scroll down to the advantages/disadvantages section near the bottom of the pate.

Ya, I had read that earlier (and about 12 more like it) but because of my seeming inability to grasp electrical language, sentences like:

"Voltage/current characteristic is not linear (not purely resistive), distorting switched waveforms to some extent. An electromechanical relay has the low ohmic (linear) resistance of the associated mechanical switch when activated, and the exceedingly high resistance of the air gap and insulating materials when open."

might as well be written in Greek.
The fact that SSR's appear to fail typically in the closed position makes me tend to steer away from them for heaters, but with skimmer's, pumps etc, that might be a good thing.
I know with an Apex system, the EB8 has some SSR and some electromechanical relay's there don't they? And I thought people were making sure to plug some equipment in SSR controlled outlets, and other equipment in the electromechanical controlled outlets. Can anyone speak to that?