Originally Posted by
AlphaMale
If you look at a lot of things in the cockpit / air law it's mainly to the US standard. It's like the question of switches being up for 'on' or down for 'on'
Except mag switches actually work the UK way. When the switch is up, it's 'off', open circuit, like a domestic light switch, and the mag is enabled. When it's down, the switch is closed, completing the circuit to earth, and the mag is grounded.
SSD