ID #1032

Polarity check

Polarity testing is a simple test that can be carried out using a polarity tester to determine whether the active and neutral of the plug end are correctly connected to the corresponding terminals at the socket end.

 

Note: The earth is tested during the earth continuity test. As per BS7671, the phase ('Live' or 'Hot') cable should connect with right hand side terminal of the socket (if we face the socket outlet).

 

Plugs
  • The order (polarity) of the pins of a three pin flat pin plug, to their connections, shall be Earth (radial pin – green/yellow wire), Neutral (light blue wire) and then Active (brown wire), in a clockwise direction, when viewed from the front of the plug looking at the pins.[11]
Cord extension sockets
  • The order (polarity) of the socket apertures of a three pin flat pin socket, to their connections, shall be Earth (radial pin – green/yellow wire), Active (brown wire) and then Neutral (light blue wire), in a clockwise direction, when viewed from the front of the socket looking at the apertures.[12]

 

source - "Wikipedia - Test and Tagging"

Tags: polarity check, technician

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