This video is part of a series of help videos on Amendment 2 of the 18th Edition of the Wiring Regulations It will help you to study for the exam and improve your chances of passing by showing you how to use the book, how to read the question and how to extract the key information from it. We want you to avoid randomly flicking through the book in the hope that the answer will suddenly appear. And if you have already passed the exam but are a little rusty, then they will help you to brush up on your knowledge and maybe even give you some new learning. Voltage drop is always a popular choice for an exam question, and most of you will have a couple of calculation questions in the exam. Knowing how to find the answer to voltage drop questions is quickly understood and can be another easy mark for you. To view all of our videos type in LearnElectrics all one word into the YouTube search bar. This is video No.149 on our YouTube channel where we have videos on a wide range of electrical topics.