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Month: March 2022

VIDEO 118 – MCB – CIRCUIT BREAKER SELECTION – TYPES B, C, D and TYPES 1, 2, 3, 4

Posted on March 21, 2022

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…

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VIDEO 117 – 2391 ASSESSMENT PRACTICE – 2 – MORE ESSENTIAL CALCULATIONS AND CIRCUIT QUESTIONS

Posted on March 18, 2022

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…

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VIDEO 116 – MCB – CIRCUIT BREAKER – HOW DOES IT WORK

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To view this video, MCB – CIRCUIT BREAKER – HOW DOES IT WORK, click on the link below https://www.youtube.com/watch?v=pBdMa9o6XJk In this video we will look at the popular Miniature Circuit Breakers and find out how they work. Using very simple drawings we will discover the two modes of operation and look at how to interpret…

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VIDEO 115 – 18th EDITION EXAM QUESTIONS – HELP & TIPS – 4 – CALCULATIONS

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To view this video, 18th EDITION EXAM QUESTIONS – HELP & TIPS – 4 – CALCULATIONS, click on the link below https://www.youtube.com/watch?v=v5S658sj1is Continuing our series of help and tips videos on how to answer the questions in the 18th Edition Wiring Regulations Exam, this video is Session number 4. There will always be questions that…

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VIDEO 114 – RCD – RCCB and RCBO Differences Explained

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To view this video, RCD – RCCB and RCBO Differences Explained, click on the link below https://www.youtube.com/watch?v=Z1gwO-FsuNY In this video we look at a common misunderstanding and also discuss the main differences between these protective devices. Explained in simple terms with plenty of diagrams and pictures this video will be found useful and informative by…

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VIDEO 113 – 2391 ASSESSMENT PRACTICE – 1 – ESSENTIAL CALCULATIONS AND CIRCUIT QUESTIONS

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To view this video, 2391 ASSESSMENT PRACTICE – 1 – ESSENTIAL CALCULATIONS AND CIRCUIT QUESTIONS, click on the link below In this video we look at some typical assessment questions such as you might expect for the 2391 assessments and similar courses. There are a number of electrical qualifications that all follow a similar prospectus…

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VIDEO 112 – Find r1 from Zs – EASY ELECTRICAL CALCULATIONS

Posted on March 17, 2022

To view this video, Find r1 from Zs – EASY ELECTRICAL CALCULATIONS, click on the link below https://www.youtube.com/watch?v=9DLgM8wM5xo We should all know how to calculate Zs from the circuit measurements that we make. But can we reverse the process. If we have measured Zs then how can we work backwards and arrive at the resistances…

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  • VIDEO 145 – Zs TABLES – 18th EDITION EXAM – AMENDMENT 2 – ANSWERING THE QUESTION
  • VIDEO 144 – 18TH EDITION EXAM QUESTIONS – AMENDMENT 2 – FINDING THE ANSWER
  • VIDEO 143 – RING CIRCUIT CALCULATIONS – TESTING METHODS – SOME PROBLEMS – THE RIGHT NUMBERS AND THE WRONG ONES

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