To view this video, 3 PHASE VOLTAGE DROP, click on the link https://www.youtube.com/watch?v=RCHw0TUEAes We’ve had lots of requests for a video on 3 phase voltage drop in electrical installations. Many factors can affect this, the position in relation to the origin, cable sizes, types of cable and the loads being serviced to name a few….

To view this video, LOOP IMPEDANCE & PFC, click on the link https://www.youtube.com/watch?v=xtDId-g7GjU Recently, we made a video on validating ring circuit test results with tips on what you should know for electrical assessments. This video follows on from that and looks at Earth Fault Loop Impedance testing, Ze, PFC and more. Again, we keep…

To view this video, VALIDATE TEST RESULTS, click on the link https://www.youtube.com/watch?v=6Re2sqGVoWY In this LearnElectrics video we will look at some assessment tips and methods on validating R1 + R2 for ring circuits and proving that the Zs measurements that you have made with your test meter are acceptable. The ability to do this, to…

To view this video, WHAT IS POWER FACTOR, click on the link https://www.youtube.com/watch?v=bXiE9bdFLsU In this video from LearnElectrics, we will take a very gentle look at this thing called power factor; and show you how we use Watts and volt-amperes to help us look at how efficient a system is. Starting at a nice easy…

To view this video, MORE MAGIC NUMBERS, click on the link https://www.youtube.com/watch?v=l0y8gtfUj_k Several years ago we made a short video called “35 THE MAGIC NUMBER” and it’s now time to improve on that, and also to add a second magic number. These numbers will help you to calculate Voltage Drop and Loop Impedance or Zs…

To view this video, 3 PHASE LOST NEUTRAL, click on the link https://www.youtube.com/watch?v=0MVNJUstzCY We’ve had questions asked recently about 3 phase installations and what happens if the neutral connection is lost. In particular, why is equipment damaged? And why is a 3 phase lost neutral serious? As well as asking what happens if the neutral…

To view this video, VOLTAGE DROP & APPENDIX F, click on the link below https://www.youtube.com/watch?v=nVZeIFeEwl0 This is part 2 of our look at Appendix F of the On-Site Guide or OSG. This is an often under-used Appendix, but it is so full of very useful information. We are working to Amendment 2 of the Wiring…

To view this video, CABLE SIZE CALCULATIONS , click on the link below https://www.youtube.com/watch?v=fkSUrz0HaPE The On-Site Guide is a useful little book, packed full of information. But sometimes, working out what it’s telling us can be difficult, and not just for new starters in the trade. Take this question for example … a frequent question….

To view this video, ZS – WHY SO MANY NUMBERS, click on the link below https://www.youtube.com/watch?v=QWr-ilqW67A We are often asked which Zs figures to use, and yes, it’s true that the books have different Zs numbers for the same circuit breaker. For many, especially new learners, there is some confusion over which numbers to use…

To view this video, SHOWER ZONES, click on the link below https://www.youtube.com/watch?v=6kZGzKhC0Lc This video look specifically at the electrical safety zones in showers, including wet rooms, in this simple approach to understanding what the regulations are telling us. If you are new to this, we hope to improve your knowledge base with regards to the…