The regulations apply to the design, erection and verification of electrical installations, plus additions and alterations to existing installations. As such the Wiring Regulations is an essential publication for all professionals working in the electrotechnical engineering services industry. This replaces the 17th Edition, which was first published in and updated in , and includes changes such as new and revised regulations, new chapters and restructured sections.
You might be surprised to hear that the first document was published in , and has since been updated on a regular basis to reflect new developments and best practice. It does, however, contain the guidelines and processes by which all electrical installations must adhere in order to comply with the legal requirements of the Electricity at Work Regulations. Therefore, it is treated in a similar way and is widely recognised in the industry as an authority.
Who needs the 18th Edition? If you work in electrical installation you will need to make sure that you are designing and installing to the latest regulations to ensure the protection of persons, livestock and property, as well as the proper function of electrical installations.
Why do I need to know about the 18th Edition? If you work on electrical installations in the UK then you need to know about the BS as this applies to the wiring installation you will be working on. However, what you are required to be is fully aware of its contents and to understand how to reference them and relate them to specific situations.
What you will need, if you want to work in this industry is the 18th Edition qualification. You will also find that when looking to register as a domestic installer on a competent persons scheme, you will need to prove you are up-to-date with the latest qualification even if you have previously completed a Level 3 NVQ. You will also find that when looking to register with the new ECS Check System it is a requirement that you hold this qualification.
There is an exception to omit RCD protection where, other than a dwelling, a documented risk assessment determines that RCD protection is not necessary.
A new Regulation The regulations concerning IT systems Regulations A new Regulation group has been inserted where automatic disconnection according to Regulation A note has been added stating that cables need to satisfy the requirements of the CPR in respect of their reaction to fire and making reference to Appendix 2, item Requirements have also been included for cables that are supplying safety circuits.
Chapter 44 Protection against voltage disturbances and electromagnetic disturbances. Section , which deals with protection against overvoltages of atmospheric origin or due to switching, has been redrafted. The AQ criteria conditions of external influence for lightning for determining if protection against transient overvoltages is needed are no longer included in BS Instead, protection against transient overvoltages has to be provided where the consequence caused by overvoltage see Regulation For all other cases, a risk assessment has to be performed in order to determine if protection against transient overvoltage is required.
There is an exception not to provide protection for single dwelling units in certain situations. Chapter 46 Devices for isolation and switching - A new Chapter 46 has been introduced. This deals with non-automatic local and remote isolation and switching measures for the prevention or removal of dangers associated with electrical installations or electrically powered equipment. Also, switching for the control of circuits or equipment. Where electrically powered equipment is within the scope of BS EN , only the requirements of that standard apply.
This is a significant change. This applies throughout the installation and not just in escape routes. This chapter has been completely revised and deals with general requirements for protection, isolation, switching, control and monitoring and with the requirements for selection and erection of the devices provided to fulfil such functions. 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. 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.
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 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 The original regulations were published across just 4 pages and laid out 3 key purposes:.
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. 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 18th edition of the wiring regulations required new electrical installations to conform to their specifications as of January 1 st , 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. 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.
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. 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 into the exam with you.
City and Guilds advise the following to exam centres. Fortunately, the 18th Edition exam is an open book exam.
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