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of negligence or any other cause. Where reference is made to legislation it is not to be considered Regulation 514.12 (Notices: periodic inspection and testing) now contains an exception for domestic (household) premises in certain situations. 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 18 th Edition includes a completely new ‘Part 8: Energy and Efficiency’ section, updates to the 1 st, 3 rd, 6 th, 7 th, 8 th, 14 th and 17 th appendices, as well as revisions to the following chapters, parts, and sections: that the load current contains no DC components. Chapter 54 - Earthing arrangements and protective conductors
The layout and structure of the guide is extremely similar to the full version. A numbering system is in-play, and, although the level of detail is reduced, users can still find the location of information in the same way. It’s also important to note that some information included is not referenced in the main 18th edition bs7671. It is therefore advisable that both documents are read thoroughly, and notes are made of key differences. Regulation 717.411.4 has been expanded to take account of PME. Section 722 - Electric vehicle charging installations Additional changes within the second amendment include protection against thermal effects and fire caused by electrical equipment, protection against voltage disturbances and electromagnetic disturbances Minor changes have been made to the model forms and guidance for recipients. These include the addition of fields This section includes changes to automatic disconnection of supply and additional protection. Section 717 - Mobile or transportable unitsTable 51 has been modified slightly to take into account changes of colour identification for DC and abbreviations have been added.
Regulation 544.1.1 concerning main protective bonding conductors has also been revised. Chapter 55 - Other equipment NOTE 1: Completion of an electrical installation designed to the withdrawn standard can be subject to the contractual agreement between all parties involved. Regulation 411.4.2 now recommends an additional connection to Earth, by means of an earth electrode in accordance with Chapter 54, is made to the main earthing terminal. Chapter 42 Protection against thermal effects Appendix 4 includes minor changes concerning a cable surrounded by thermal insulation. Appendix 6 Model forms for certification and reporting
About the IET Wiring Regulations
Modifications have been made to Regulation Group 543.7 concerning earthing requirements for the installation of equipment having high protective conductor currents. 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. Regulation 443.4.2 requires protection against overvoltages to be considered in the case of equipment likely to produce switching overvoltages or disturbances and gives conditions. It would be impossible to cover all of the detail pertained in the book within a summary article. However, please see below a list of key sections and Appendices sub-headings, which should help you to understand what items are broadly available. Sections: A new Regulation 514.16.1 has been introduced requiring a label to indicate the presence of SPDs. However, there is an exception for domestic (household) premises or similar. Chapter 53 - Protection, isolation, switching, control and monitoring
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