Ummm, that would be your other left...! Are we getting back to which side of the road we're driving on...? sign1
As far as continuous power to the whole layout - - -
On non-power routing turnouts, A will be electrically continuous with B going to the right, but not "down" (the diverging route), regardless of which way the points are thrown. Power is fed through the turnout all the time.
A power routing turnout will turn "off" the power to the route that is not selected.
Andrew
PS - The prototype does call them turnouts, according to my circa 1930 Canadian National Railway MOW handbook.
PPS - When I last drove in the UK (2003), I found I was continually mixing up my left and right. I attribute this to the fact that the driver (from my point of view) normally sits on the left. So any turn to the driver's side is a left turn. If course it's the exact opposite in the UK, leading me miles off course at times...! hamr