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 for your end skills test AM2, AM2S or AM2E requires time testing at college and on-site experience of testing electrical circuits.
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NOTE - Your end point assessment AM2 and AM2S will require you to have the main switch locked off, sign in place and key In your pocket during this test 👍🏻.
🔵 Live Testing AM2 & AM2S - External Earth Fault Loop Impedance Ze, PEFC, PSCC on a 3 Phase Dis-Board https://youtu.be/IeWoLUIKuJw
== 🕐 Time Stamps - Cut to the action 🕕 ==
00:00 - 3 phase supply polarity
00:20 - GS38 test probes
00:55 - Testing between the earthing conductor and line conductors L1, L2 and L3
01:23 - Testing between the earthing conductor and neutral
01:47 - Testing between neutral and line conductors L1, L2 and L3
02:04 - Testing between line conductors L1, L2 and L3
Videos are training aids for City and Guilds (C and G) and EAL courses Level 1, 2, 3 plus AM2, AM2S and AM2E.
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