To view this video, LOOP IMPEDANCE – WHY IS IT IMPORTANT, click on the link below https://www.youtube.com/watch?v=c8tBkW9XkMw In this video from Learn Electrics, we will look at Loop Impedance, why you need to know it and why it is one of the important steps in showing that an installation is safe to be put into…
VIDEO 126 – EASY VOLTAGE DROP FORMULA and CABLE SIZE CALCULATIONS – ALL IN ONE – PART 1
To view this video, EASY VOLTAGE DROP FORMULA and CABLE SIZE CALCULATIONS – PART 1, click on the link below https://www.youtube.com/watch?v=JE8vRFfGAS0 We’ve been asked by many times if the voltage drop formulas can be made any easier. Some say that the tables just confuse them, there is too much going backwards and forwards in the…
VIDEO 125 – SPD INSTALLATION IN A CONSUMER UNIT – HOW TO and THE BASICS
To view this video, SPD INSTALLATION IN A CONSUMER UNIT, click on the link below https://www.youtube.com/watch?v=pgiUeQ3Z7Cw We have often been asked about installing SPDs into domestic consumer units. Whilst there is no legislation making this obligatory in domestic dwellings at the moment, many customers are considering this as an option to protect the many electronic…
VIDEO 124 – EARTHING A SHED OR OUTBUILDING – TT – TNS – TNCS
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,…
VIDEO 123 – LOAD CALCULATIONS FOR LIGHTING TRANSFORMERS – HOW MANY AMPS IS THAT?
To view this video, LOAD CALCULATIONS FOR LIGHTING TRANSFORMERS, click on the link below https://www.youtube.com/watch?v=pqRrS-iUO-I We are sometimes asked about calculating the load requirements for lighting circuits that have extra low voltage transformers installed, and 12 volt down lighters being an example. A typical question for LearnElectrics might go like this … We have six…
VIDEO 122 – WIRING A GARAGE CONSUMER UNIT – HOW TO – A SIMPLE STEP BY STEP GUIDE
To view this video, WIRING A GARAGE CONSUMER UNIT, click on the link below https://www.youtube.com/watch?v=YIlTbuChRSY At LearnElectrics we are sometimes asked about the wiring connections inside a garage consumer unit or mini consumer unit as they are sometimes called. In this video we will look at just how this is done and provide the information…
VIDEO 121 – TESTING BONDING and EARTH CABLES – WANDER LEADS and CALCULATIONS
To view this video, TESTING BONDING and EARTH CABLES – WANDER LEADS and CALCULATIONS, click on the link below https://www.youtube.com/watch?v=wYsYBE-MXzQ We’ve been asked several times recently about wander lead tests and how to test bonding cables properly. This is such an important process to understand and done properly will be one step in the process…
VIDEO 119 – 18th EDITION EXAM QUESTIONS HELP 5 – Zs FINAL and DISTRIBUTION CIRCUITS
We continue our series of help and tips videos on how to answer the questions in the 18th Edition Wiring Regulations Exam and this video is Session Number 5. Every 18th Edition exam will always have several questions on Zs and you must know how to select the correct tables to answer the question and…
VIDEO 118 – MCB – CIRCUIT BREAKER SELECTION – TYPES B, C, D and TYPES 1, 2, 3, 4
To view this video, MCB – CIRCUIT BREAKER SELECTION, click on the link below https://www.youtube.com/watch?v=QfVi25LQcI4 In this video we will look at the Type designations of Miniature Circuit Breakers and find out how circuit characteristics affect the type selection process. We should not simply install a different MCB type just because it might solve a…
VIDEO 117 – 2391 ASSESSMENT PRACTICE – 2 – MORE ESSENTIAL CALCULATIONS AND CIRCUIT QUESTIONS
To view this video, 2391 ASSESSMENT PRACTICE – 2, click on the link below https://www.youtube.com/watch?v=FIYPvQk55NA In this video we look at more typical assessment questions such as you might expect for the 2391 assessments amongst others. There are a number of electrical qualifications that all follow a similar prospectus and as you would expect, the…