This switch
http://terminalsupplyco.com/Store/Pr...x?pc=MLR-AMBER
has terminals marked "PWR ACC GRD". How should it be connected?

I'll speculate that PWR & ACC are for the circuit and GRD is for the
lamp.
If GRD is connected to the neutral conductor, the lamp is on when the
switch
is closed?

Thanks, ... Peter E.
peasthope at shaw dot ca