To view this video, TT SYSTEMS – RCDs – Ze and Zs, click on the link below https://www.youtube.com/watch?v=HSviV-HiLVo To view all our videos, click on the following link https://www.youtube.com/channel/UCYaJQnpO4XAp0yCgqzMkmfA TT systems have been around for many years and although TNS and latterly TNCS systems were introduced, there are still many installations around the country that…

To view this video, 18th EDITION – SESSION 7 – TESTING, click on the link below https://www.youtube.com/watch?v=1N327xNJWB0 To view all our videos, click on the following link https://www.youtube.com/channel/UCYaJQnpO4XAp0yCgqzMkmfA This series of exam help videos focuses on the 18th Edition of the Wiring Regulations BS7671. Whether you are studying for the exam or just wanting to…

To view this video, SPURS ON SOCKETS, click on the link below  https://www.youtube.com/watch?v=XqtrWfpW06w To view all our videos, click on the following link https://www.youtube.com/channel/UCYaJQnpO4XAp0yCgqzMkmfA Spurs on sockets, spurs on spurs, FCUs on sockets. Can I add a socket in the garage? Can I add a spur for the central heating boiler? Can I take a…

To view this video, PART P TESTING SEQUENCE and ASSESSMENT, click on the link below https://www.youtube.com/watch?v=K32EZXnMTQo To view all our videos, click on the following link https://www.youtube.com/channel/UCYaJQnpO4XAp0yCgqzMkmfA When joining a Part P Competent Person Scheme, how do we prepare for the practical on-site testing assessment that is essential to becoming a scheme member. What tests…

To view this video, 18th EDITION – SESSION 6 – DEFINITIONS, click on the link below https://www.youtube.com/watch?v=ohGWwOD3BSk To view all our videos, click on the following link https://www.youtube.com/channel/UCYaJQnpO4XAp0yCgqzMkmfA Definitions is an important part of the Wiring Regulations book and is so very useful when using any part of the book. Reference can be made to…

To view this video, MATCHING CABLE SIZE TO CIRCUIT BREAKER and FUSE SIZE, click on the link below https://www.youtube.com/watch?v=VtTUkUpQ-Rc To see a full list of all our LearnElectrics videos, click on the link below. https://www.youtube.com/channel/UCYaJQnpO4XAp0yCgqzMkmfA How do we go about making the correct selection of fuse sizes, circuit breaker sizes and cable sizes? We all…

To view this video, 18th EDITION – SESSION 5 – VOLTAGE DROP CALCULATIONS, click on the link below https://www.youtube.com/watch?v=Z-kw680SIoo To view all our videos, click on the following link https://www.youtube.com/channel/UCYaJQnpO4XAp0yCgqzMkmfA As many of us know, understanding an equation is half the battle in performing the correct calculation and reaching the right answer. The 18th Edition…

To view this video, Zs and the 80% RULE, click on the link below https://www.youtube.com/watch?v=ihD-NO-7G5Y To view all our videos, click on the following link https://www.youtube.com/channel/UCYaJQnpO4XAp0yCgqzMkmfA Every electrical installation should be inspected and tested before being put into service. When it comes to testing the circuits there are so many tables of numbers and options…

To view this video, 18th EDITION – SESSION 4 – ADIABATIC EQUATIONS, click on the link below https://www.youtube.com/watch?v=173C7yE-xbU To view all our videos, click on the following link https://www.youtube.com/channel/UCYaJQnpO4XAp0yCgqzMkmfA Adiabatic Equations are an essential part of confirming safety in an electrical installation. During an earth fault there will be massive fault currents flowing, several hundred…

To view this video, DIVERSITY and MAXIMUM DEMAND, click on the link below https://www.youtube.com/watch?v=TV2IZtmydm4 To view all our videos, click on the following link https://www.youtube.com/channel/UCYaJQnpO4XAp0yCgqzMkmfA Being able to calculate and understand the difference between diversity and maximum demand is an important skill for all electricians. It will avoid overloading the main fuse, with all its…