LIVE Electrical Testing External Earth Fault Loop Impedance (Ze), PFC, PEFC & PSCC Student trading aid for testing for external earth fault loop impedance Ze and PFC tests. Please note this test is carried out live under controlled conditions and all relevant safety precautions are in place. Includes a full demonstration on how to carry out an external earth fault loop impedance, PFC, PEFC and PSCC tests of a domestic single phase installation in the real world. Please note the incoming protecti

3 Phase Prospective Fault Current Tests - PFC Live testing for prospective earth fault current PEFC and prospective short circuit current PSCC (PFC tests). These tests are demonstrated on a live 3 phase distribution board and will help with AM2 and AM2S exams. We use the rule of thumb for calculating the PSCC test by taking the highest reading form the line and neutral tests and doubling it and then we go on to show you how some instruments can measure PSCC between line conductors. As always pre

First Live Test - Check Polarity of 3 Phase Supply, Using an Approved Voltage Indicator AM2 & AM2S First live test according to BS 7671 is check polarity of the supply with an approved voltage indicator. For AM2 and AM2S the 3 phase distribution board will need testing to prove the incoming 3 phase supply polarity. For this test I used a voltage indicator and proving unit I explained in the video my thinking behind my use of the proving unit as it is not necessarily required. As always preparing