How Does an Electrical Line Tester Work?

 

How Does an Electrical Line Tester Work? 

How Does an Electrical Line Tester Work? 

To test the presence of 'Alternating current' (AC), an electrical line tester is employed. In AC, the phase line gives both positive and negative components, for instance, an electrical bulb glows when current is skilled the bulb from 'phase' to 'neutral'. The neutral is at a lower potential. Electricity flows from higher potential to lower potential as heat flows from higher temperature to lower temperature and water flows from a better level to a lower level.

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Electric line tester, once we keep the pointed end of the tester in touch with the wire through which current is passing and touch the metal cap at the opposite end, a little amount of current passes through the neon bulb, high resistance within the tester and thru our body to the world (which is at zero potential). Here the body completes the electrical circuit which makes the neon bulb glow.

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If the bulb glows, it means the present is passing through the wire, and therefore the device under test is functioning otherwise, the present isn't passing through the device or the road under test is faulty. High resistance within the tester allows only a little amount of current to undergo our body.