TR3 Overdrive Switch - Up or Down?

[Don Spence <dkspence@telus.net>]

Michael
  the convention in NA is based on safety. Back in the day when knife 
switches were used  for large amperage situations they were originally, 
up is off and down is on. That is until someone was killed replacing 
stadium lights or some such thing when gravity intervened causing the 
switch blade to fall and activate the circuit, After that the standard 
became down = off.