18th Edition Practice

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18th Edition Practice Test


You have 120 minutes (2 hours) to answer 60 18th Edition Questions. You must score at least 36 to pass. You may check answers after each question or wait until the end of the test to view your results. Click the start button to begin. Best of luck!

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18th Edition Mock Tests

All of the mock tests below contain over 1000 questions in total. For all the practice tests below, you have two hours to answer 60 questions, like the real exam. Each question has four possible options with one correct answer.

Access tests which assess individual 18th Edition topics below:

The 18th Edition refers to the latest British Standards and regulations regarding requirements for electrical installations and IET wiring. First published in 1882 under the title of ‘Rules and Regulations for the prevention of Fire Risks Arising from Electric Lighting’, they have been updated on an average of every 7 years with the latest change s effective since January 2019. But who needs to know about the 18th Edition? What are the key changes? And, what does the 18th Edition test involve?

In this article, we will run you through everything you need to know about the 18th edition and how to prepare yourself for the test.

History of the 18th edition

On September 26th, 1881 the world’s first fully electric-powered public street lighting was turned on in a town called Godalming in Surrey. These lights were provided by the German firm Siemens and used to replace the gas lighting system. However, all was not completely well with the new system. Indeed, as soon as power was switched on there were reports of problems with the wiring. This was particularly apparent on the side streets where the lights barely lit up the ground below them. More concerning, were reports of people coming to harm on exposed wires. By 1884 the town abandoned the project.

With more towns inspired to abandon gas for electric lighting systems, the Society of Telegraph Engineers and of Electricians acted to design bets practice guidelines. This saw the first edition of the British Wiring Regulations published in 1882. As mentioned, the title of the regulation sat this time was ‘Rules and Regulations for the prevention of Fire Risks Arising from Electric Lighting’, highlighting fire risk as a key area of concern. The original regulations were published across just 4 pages and laid out 3 key purposes:

  1. To ensure high-quality workmanship of wiring;
  2. To ensure appropriate quality of material usage, and;
  3. To ensure any electrical wiring installations were safe and fit for purpose.

The wiring regulations have been regularly updated ever since to reflect both new developments in wiring and updated modes of best practice. They remained the responsibility of the Society who later became known as the Institute of Electrical Engineers. They now tend to be referred to by their acronym, the IET. Over the years, regulatory standards across nations and continents have become increasingly aligned. This began in 1981 when the regulations aligned with those of the International Electrotechnical Commission (IEC). In 1992, the British Standards Institute (BSI) formalised the wiring standards under BS 7671. More recently, the European Committee for Electrotechnical Standardization has harmonised wiring regulations further.

Because of this patterned history, the 18th Edition is often known by a variety of names. As such, when you hear people in the industry talking about any of the following, they will be talking about the 18th edition:

  • The Regs
  • Wiring Regs
  • BS 7671
  • The 18th Edition wiring regs

When did the 18th edition come into force?

The 18th edition of the wiring regulations required new electrical installations to conform to their specifications as of January 1st, 2019. They were first published in the July of 2018 under and separately entitled as the IET Wiring Regulations, BS 7671:2018 Electrical Regulations, and the Eighteenth Edition.

Those working in electrical installations are required to ensure they design and install everything in line with these latest regulations. This is to protect people, livestock, and property and to ensure the electrical installations function properly.

How to pass the 18th edition exam?

The exam covering the 18th edition wiring regulations is taken online at an approved test centre. There are a total of 60 questions which you have 2 hours to answer. Typically, the pass mark for the 18th edition exam is 60%, about 36 questions. However, the pass rate is variable depending on average success rates nationally. As such, when people achieve more highly, the pass mark will go up. Therefore, if you want to be sure you will pass it makes sense to aim for a higher pass mark of at least 70% and above. This would equate to getting at least 42 out of 60 in the test.

The two hour test times gives you a full two minutes for every question, although you can spread this time out as you wish. With appropriate preparation, study, and following the tips in this post, you will be well prepared to pass the 18th Edition exam.

The 18th edition exam is an open book exam, so you can take your copy of BS 7671 into the exam with you. City and Guilds advise the following to exam centres.

What can you take into the exam?

Fortunately, the 18th Edition exam is an open book exam. This means you can bring specified materials into the exam with you. This includes the BS 7671 book which you will need to study in order to pass the test. In addition to the book itself, you are also permitted to by the IET to use things like numbered post-it notes or folded down pages. You can use these as bookmarks on your BS 7671 book to mark important chapters or key information you expect to need during the exam. You are also allowed to highlight text in your book.

Whilst the IET allows the book to be taken into the exam with above assistive learning tools, the IET wiring regulations books are not allowed to contain any of the following:

  • Copies of sample questions from mock papers;
  • Pre-written answers or diagrams;
  • Written notes in the margins of the book or held separately, and;
  • Any other notes or materials that could be deemed to unfairly advantage you in your attempts to answer any of the exam questions.

The test centres hold responsibility for checking any material you wish to take into the exam with you. If they feel that the material you have in your book will advantage you in any way, they may provide a clean copy of the IET Requirements for Electrical Installations (i.e. BS 7671). You may also find that some test centres insist on using their own copies of the regulations to ensure everyone is treated fairly. If you wish to use your own book with the permitted additions, it is advisable to contact your test centre to confirm they will permit this.

You should also be aware that some centres do not offer clean copies for people who have made notes in their books. As such, you should also contact the test centre to find out whether they are able to offer this service if you feel your book will not be permitted for use in the examination.

As well as your book, you will need to take a scientific calculator with you to the exam. This should not be a programmable calculator. Any calculators from the Casio FX range (eg. FX 83, FX 85, FX 119, FX 991) are suitable for this purpose. These will not be provided by the test centres so you will need to buy one of these prior to sitting the exam.

What is covered by the 18th edition exam?

The table below outlines what is covered in the BS 7671 book outlining the IET Requirements for Electrical Installations. It also highlights the number of questions in the exam will target the different sections covered in the book. The ‘Test Value (%)’ column serves to show how much of your time should be spent revising each book section. This is based on the total number of questions covered by each book section out of the 60 that will be asked.

Book Part Exam Question Numbers What Questions Cover Test Value (%)
1 1, 2, 3, & 4 Part 1 of the BS 7671 shows what sorts of installations are covered by the 18th Edition Regulations. It outlines what the regulations are meant for the basic requirements to follow for safety. 7
2 5 & 6 This section outlines key definitions relating to the terms used by the 18th Edition Regulations. 3
3 7, 8, 9, 10, 11, & 12 The information covered in this section is general and related to fundamental principles you will need to adopt prior to beginning design work. 10
4 Questions numbered 13 to 27 This section includes information pertaining to 25% of overall marks available. You will learn about various methods to protect against things like electric shocks and overcurrents. You will also be introduced to how you can implement these methods in practice. 25
5 Questions numbered 28 to 41 This section outlines how to meet requirements when selecting and using equipment, cables, and other accessories at work. The information covered here will be covered by 23% of the exam’s questions. 23
6 Questions numbered 42 to 45 This section outlines the relevant tests that must be performed on any installation prior to it being energized. 7
7 Questions numbered 46 – 55 This section covers special requirements for installations in specific locations. This includes things like bathrooms, swimming pools, commercial premises, construction sites. This is another important section at 17% of the marks. 17
8 Questions numbered 56- 60 The appendices of the book provides useful background information in a tabulated format. You will need to answer some questions based on the information found here too. 8

How to prepare for the exam

So how do you prepare for the exam? Here, we outline some top tips:

Click here to view more exam tips.