To view this video, OHM’S LAW AND THE POWER MATRIX, click on the link below https://www.youtube.com/watch?v=fhHq_VPfWh4 In this LearnElectrics video we will explore Ohm’s Law and Power Law and show you the Power Matrix. These formulas are so very useful, they can quickly and accurately help you to choose the right size breaker for example,…
VIDEO 191 – ADD A LIGHT TO A ROOM – PARALLEL LIGHTING – WHAT CONNECTIONS TO MAKE AND THE CHANGES TO BE MADE
To view this video, ADDING A LIGHT TO A ROOM, click on the link below https://www.youtube.com/watch?v=bW44Ie4jOHc To view all our videos, click on the following link https://www.youtube.com/channel/UCYaJQnpO4XAp0yCgqzMkmfA In this LearnElectrics video we look at how we should connect domestic lighting circuits when adding extra lamps to a circuit. It’s easy enough to do, but if…
VIDEO 190 – Zdb – WHAT IS IT? – WHY DO WE HAVE Ze? – WHY USE Zs? – TESTING Zdb AND RECORDING THE RESULTS ON TEST CERTIFICATES
To view this video, Zdb – What is it?, click on the link below https://www.youtube.com/watch?v=eIM0-uVtV0E In this LearnElectrics video we will look at the measurement of Zdb – this mystery symbol that pops up on the Schedule of Test Results. A recent question asked us … Why do some certificates ask for Ze and some…
P192 – OHM’S LAW AND THE POWER MATRIX – PRINTABLE PDF
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. …
VIDEO 189 – S PLAN WIRING – EASY TO FOLLOW STEPS – HOW THE COMPONENTS GO TOGETHER – CLEAR DRAWINGS AND METHOD
To view this video, S PLAN WIRING, click on the link below https://www.youtube.com/watch?v=w0UaKhLVmdI This video will show you the basics of S-Plan wiring in an easy-to-follow process. We will break the wiring installation down into a step-by-step sequence as we explain how the S Plan components work and fit together. For many of us, when…
VIDEO 188 – CONTINUITY TESTING AND INSULATION RESISTANCE TESTING – THE DIFFERENCES – THE REASONS – AND MORE
To view this video, Continuity Testing and Insulation Resistance Differences, click on the link below https://www.youtube.com/watch?v=Ax4-bZ7WDwg A question that was asked recently … Why do we test a copper conductor for continuity and expect a low-ohms reading about 1 or 2 ohms … AND THEN … why do we test the same conductor at 500…
VIDEO 187 – OHMS LAW FOR TECHNICAL EXAMS – PART 2 – SERIES PARALLEL CIRCUITS – WITH WORKED EXAMPLES & PRACTICE QUESTIONS
To view this video, SERIES PARALLEL CIRCUITS, click on the link below https://www.youtube.com/watch?v=TtA94FEFIRM This video continues our look at Ohm’s Law, and is about improving your understanding of it for electro-technical exams and for everyday workplace use. Electro-technical exams will always include questions on Ohm’s law, and you will be expected to make basic calculations…
VIDEO 186 – OVERCURRENT DIFFERENCES – OVERLOAD – SHORT CIRCUIT – EARTH FAULT – WHAT ARE THEY AND HOW DO THEY WORK?
To view this video, OVERCURRENT DIFFERENCES, click on the link below https://www.youtube.com/watch?v=A9Zze4uNgRw What is an overcurrent? What do we actually mean when we talk about overcurrents? New starters in the trade, and even the occasional more experienced electrician, will get confused by the different terms and it is important that we use the correct terminology…
VIDEO 185 – SPD – SURGE PROTECTIVE DEVICES – WHAT ARE THEY – PROTECTIVE DEVICES PART 3 – HOW THEY WORK – WHAT THEY DO
To view this video, SPD – SURGE PROTECTIVE DEVICES, click on the link below https://www.youtube.com/watch?v=CCZJ0CPOR2U This is part 3 of our mini series on protective devices. There are many protective devices available, and they tend to fall into very different protection style groups. Each group performing its own specialised functions. SPDs or surge protective devices…
VIDEO 184 – BOND YES OR BOND NO – DO I BOND THAT OIL TANK – OR THAT WATER PIPE – AN EASY CALCULATION FOR SAFETY
To view this video, BOND YES OR BOND NO, click on the link below https://www.youtube.com/watch?v=nLl1qgyB7Mk In this LearnElectrics video we will take a simplified look at what we can do when we need to make a decision about equipotential bonding of conductive parts that are not part of the electrical installation. This is an important…