How to Test a Ring Final Circuit

Description: In this video me and Marcus look at dead test number 2 in BS7671. In the test sequence this is "testing continuity of ring final circuit conductors, including protective conductors". We go through all 3 stages recording the results and we show the calculation for R1 + RN and R1 + R2 from r1, rn and r2 end to end readings. We prove the circuit is wired as a ring final circuit sometimes called a ring main or socket circuit. After proving the circuit is wired as a ring and the polarity of the sockets and record the results on the testing paperwork.

How to carry out a figure of 8 test on a ring final circuit (sometimes call incorrectly a ring main circuit)

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== 🕐 Time Stamps - Cut to the action 🕕 ==

00:00 - Stage 1 – Ring Final Circuit Continuity
00:35 - Measuring r1, rn and r2
01:25 - Calculating Expected Resistance Values
02:05 - Stage 2 – Line and Neutral Figure of Eight
02:45 - Testing a Fused Connection Unit and Spur
03:35 - Testing Socket Outlets and Checking Polarity
04:35 - Investigating High Resistance Readings
05:35 - Stage 3 – Line and CPC Figure of Eight
06:15 - Calculating and Measuring R1 + R2
07:00 - Testing the Spur and Confirming Polarity
08:00 - Testing All Socket Outlets
09:15 - Recording the Highest R1 + R2 Reading
09:45 - Completing the Schedule of Test Results

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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