Question

Position of water is switch in a circuit is

Answer 1

Switches for any device should be the first thing in the circuit, as shown, so that no

power is used when the device is not being used. The switch would be in the phase or live side if it is mains, though can be in both phase and neutral if a two-pole switch is used, but not normally done. In DC, convention is to put the switch in the positive lead.

In the above, the fuse is also in the live/phase, after the switch.

Putting the switch as in above is an extra safety feature as it immediately disconnects the load in the event of a fault.