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To view this video, 18th EDITION HELP – USING THE TABLES, click on the link below https://www.youtube.com/watch?v=S6MUZ1BqKaA In this video from LearnElectrics we will look at an important subject for 18th Edition exams. Expect several questions on Zs and the associated calculations which can account for up to 10% of the exam questions. If you…

This PDF accompanies VIDEO 207 – Electrical Formulas you need to know. The video will show you how to transpose or re-arrange some essential electrical formulas. The worked examples cover the types of questions you will be asked in electrical exams and, of course, are essential formulas to use on-site.   The video can be…

This PDF accompanies a LearnElectrics video on Ohm’s law and the Power Matrix. These are essential calculations for any electrical trade and will almost always appear in any electrical exam or assessment. Understanding Ohm’s Law, understanding Power Law and being able to manipulate and combine both formulas is a must have skill for many.  …

P163 – OHM’S LAW WHEEL AND POWER MATRIX – DOWNLOADABLE AND PRINTABLE PDF   This downloadable and printable PDF from LearnElectrics is taken from the video that gives full instructions on how to use the Ohm’s Law Wheel and its cousin, the Power Matrix. The video also explains, in simple terms, how the Ohm’s Law…

  To view this video, EARTHING A SHED OR OUTBUILDING, click on the link below https://www.youtube.com/watch?v=UgDhYDArgdA With more people working from home now, here at LearnElectrics, we have been asked many times about converting a shed into a work space or work cave as some call it. The electrical supply to such a work space,…

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…

        We should all know how to calculate Zs from the various circuit measurements. But can we reverse the process. If we have measured Zs then how can we work backwards and arrive at the resistances of the individual circuit conductors? And how do we unravel the resistance values of a ring…

CABLE LENGTH CALCULATIONS FROM RESISTANCE When inspecting an installation, planning extensions to circuits and other remedial work, we may need to know the length of a circuit’s cables. You may know, for instance, that you have the two ends of a ring circuit, but do you know the route taken by the circuit’s twin and…

VIDEO 001 The Resistor Colour Code To view this video, The Resistor Colour Code, click on the link below https://www.youtube.com/watch?v=Rexyl2V829g To view all our videos, click on the following link https://www.youtube.com/channel/UCYaJQnpO4XAp0yCgqzMkmfA   In this video you will learn how to use The Resistor Colour Code for 3 band, 4 band and 5 band resistors. For…