Requirements for Electrical Installations, IET Wiring Regulations, Eighteenth Edition, BS 7671:2018+A2:2022 (Electrical Regulations)

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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. As well as more minor changes to Chapters 3.3, 5.1, 6.2, 6.4, 6.7, 6.8, 9.5, the following major technical changes have been made to this edition of the Standards:

Lastly, it is an unfortunate truth that some electricians wrongly advise clients that installations have failed testing, basing their assertions on regulations set out in outdated edition guides. Whether this is to secure additional work or due to the tradesman’s ignorance is irrelevant; all electricians should arm themselves with the current legislation. This may not be key information for your exam, but honesty and transparency should be leveraged in whatever activity you undertake as an electrician- trainee or otherwise. In summaryCOLREGS set out the conduct of vessels in any condition of visibility, specifically when in sight of each other, and also in or near areas with restricted visibility.They make it clear when you are the stand on vessel, the give way vessel and the correct action to take when in close quarters with other vessels to avoid a collision. They also help you to anticipate the actions of another vessel. On September 26 th, 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 so many changes afoot, it is easy to see the importance of maintaining and updating your knowledge of the Regs as an electrotechnical professional. 18th Edition Book in Practice Regulation 411.3.3 has been redrafted and now has three indents. There is still an exception to omit RCD protection where, other than BA1, BA3 or children (BA2, BA3) and mobile equipment (not exceeding 32 A) for use outdoors, a suitably documented risk assessment determines that RCD protection is not necessary. Section 514 contains a number of significant changes (including illustrations of notices which have been removed and examples are provided in Appendix 11). Some of the main changes are mentioned below. Although a good knowledge of all COLREGS is essential, the steering and sailing rules set out in Part B (Rules 4-19) are the ones likely to be most significant to small boats operating in daylight, with good weather or restricted visibility.Ultimately preventing a collision is the single most important thing. So, if the action of the give way vessel alone isn’t sufficient to prevent a collision or it takes no action at all, the stand on vessel must also take action. If a collision does occur, then both vessels may be found to be at fault to a certain extent. Get to grips with the rules of the road Regulation 531.3.3 now states that RCD Type AC shall only be used to serve fixed equipment, where it is known Regulation 411.3.1.2 has been redrafted. The regulation now requires that in each consumer’s installation within a building extraneous-conductive parts that are liable to introduce a dangerous potential difference be connected to the main earthing terminal.

The information covered in this section is general and related to fundamental principles you will need to adopt prior to beginning design work. Allocate an appropriate length of time dependent on each section’s volume of questions. This approach should be deployed for both revision and in the exam itself. The 18th Edition book is predominantly used by, but not limited to, electricians and electrical contractors. If you are an electrician, you are probably already extremely familiar with the Regs. It not only supports domestic and commercial installations, but it also underpins electrical practices in environments like agricultural premises, caravans, external lighting, mobile units, temporary installations, fairgrounds, highway equipment and street lighting. Chapter7.2 - updates to underlay and sarking, ventilation; vapour control and insulation; battens, fixing of tiles and slates; valleys and hidden gutters and traditional roof arrangements; protection of trussed rafter roofs and bracing requirementsThere are also a number of useful considerations to take into account on Periodic Testing & Inspection. that the load current contains no DC components. Chapter 54 - Earthing arrangements and protective conductors Section 411 contains a number of significant changes. Some of the main changes are mentioned below. Regulation 514.9.2 has been introduced to advise that all diagrams, charts, and information or instruction notices comply with the applicable standards specified. Regulation 443.5 (Risk assessment method) has been deleted and Annex A443 (examples of calculated risk level CRL for use of SPDs) has also been deleted. Section 514 - Identification and notices

Changes include the addition of new regulations (relocated from Chapter 53) covering the impact and the installation of heating cables. Chapter 82 - Prosumer’s low-voltage electrical installations Minor changes have been made including reference to prosumers electrical installations and installing fibre optic cables. Part 2 - Definitions This is a new appendix that provides guidance for the types of safety signs, warning signs and instructions required to be applied to electrical installations. Appendix 13 Escape routes and fire protection The IET’s (Institute of Engineering and Technology) Requirements for Electrical Installations goes by many aliases; the 18th Edition, BS7671:2018, the Big Blue Book, Wiring Regs, or simply the Regs. But regardless of what you call it, one thing is for sure – if you’re involved in the design, installation or maintenance of electric wiring, you’re going to need it.The book is set out in seven parts and certainly isn’t for the faint hearted. It is full of exactly what it says it is, regulations. But fear not, there is a logic that can be followed. Once you are able to navigate the sections of the book, you will be able to easily find your way around it and apply it to the scenario in hand. The seven parts are; For all other cases, protection against transient overvoltages shall be provided unless the owner of the installation declares it is not required due to any loss or damage being tolerable and they accept the risk of damage to equipment and any consequential loss.