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Month: February 2022

VIDEO 111 – 2391 – RING CIRCUIT TESTING – RESISTANCE – R1+R2

Posted on February 23, 2022

To view this video, 2391 –  RING CIRCUIT TESTING , click on the link below https://www.youtube.com/watch?v=yPmBpunvoT0 We’ve had a few requests to explain what sort of “things” an assessor is looking for when they are observing someone carrying out ring circuit tests. And we’ve also had questions about just what is an R1 plus R2…

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VIDEO 110 – INSULATION RESISTANCE TESTING – 3 PHASE CIRCUITS – SEQUENCE OF TESTING

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To view this video, INSULATION RESISTANCE TESTING – 3 PHASE CIRCUITS, click on the link below https://www.youtube.com/watch?v=Xe9vD_a3qEE We have had a number of requests for a method or sequence of testing for 3 phase installations. In this short video we will show just one method of a reliable and fool-proof testing sequence that we have…

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VID 109 – CABLE LENGTH FROM RESISTANCE – EASY CALCULATIONS – HELPFUL PRINTABLE TABLE

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To view this video, VID 109 Notify post – CABLE LENGTH FROM RESISTANCE –  click on the link below https://www.youtube.com/watch?v=CjewkvxxHQE Just how long is that cable? How often have we thought that. Have you ever wondered just how far that ring circuit might actually travel. Is it just a short circuit around the kitchen or…

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P117 – 2391 CIRCUIT QUESTIONS No.2 – CALCULATIONS AND CIRCUIT CHART – PRINTABLE PDF

Posted on February 2, 2022

P117 – 2391 CIRCUIT QUESTIONS No.2 – CALCULATIONS AND CIRCUIT CHART – PRINTABLE PDF This continues our mini-series on 2391 assessment questions with another test results chart and a further 8 questions with fully worked answers. We have also included an essential calculations sheet with the most relevant calculations for this video and exercise. The…

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