Why should switches always be connected to the live wire?

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Solution

Switches should always be connected to the live wire.
The device can never be switched off if switch is in the neutral load.
The live wire is always at higher potential
Neutral wire is always at zero potential.
The switch must be placed in live wire to maintain the body of appliance at zero potential in the switch off position.
If the switch is kept in neutral wire, then the body of the appliance to keep the body at infinite potential in the switch on position.
Hence, a switch for any electrical appliance is always fitted on to the live wire so the device cannot be switched off if it is in the neutral lead.

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