Testing Socket Circuits
A polarity test must be carried out on all socket circuits whether new or after an alteration has been made. This is to ensure that the phase, neutral and protective conductors are connected to the correct terminals in each socket.
The test must be done with the supply DISCONNECTED. Testing may be carried out as follows:
· Remove circuit fuse or open MCB.
· Ensure that all appliances are unplugged or switched off.
· Connect one lead of the ohmmeter to the phase conductor in the distribution board as shown in Figure 21.
· Connect the other lead to the phase terminal in each socket in turn.
· A very low resistance reading should be found at each socket, indicating its polarity is correct.
The polarity of the neutral and protective conductor should also be checked in the same manner.