Testing of Polarity of the Single Pole Switches

Testing of Polarity of the Single Pole Switches Points : testing of polarity of the single pole switches As has already been explained, the switch should always be placed only in the positive side or live wire only to make the lamp holder quite dead when the switch is made off, otherwise if the holder is connected in the live directly, the mechanic is liable to get a shock.

For testing that all the swatches are correctly connected, the lamps removed from the holders and the test is made with a test lamp. The one end of which is earthed, and the other end of the test lamp is connected through a lead to switch. If the lamp lights, the switch is correctly inserted and if the lamp does not light it means that the switch has not been correctly inserted.