On-Site Guide (BS 7671:2018+A2:2022) (Electrical Regulations)

Product Information

This digital NICEIC Guide is intended for contractors who carry out electrical work in dwellings, including houses and flats. Impartiality is the governing principle of how BSI provides its services. Impartiality means acting fairly and equitably in its dealings with people and in all business operations. It means decisions are made free from any engagements of influences which could affect the objectivity of decision making. The guidance is based on the requirements of BS 7671: 2018+A2:2022 Requirements for Electrical Installations, and references to Regulation numbers are to those contained in that Standard. Additional Details Author As an accredited certification body, BSI Assurance cannot offer certification to clients where they have also received consultancy from another part of the BSI Group for the same management system. Likewise, we do not offer consultancy to clients when they also seek certification to the same management system.

The impact of Amendment 2 of the 18th edition (BS 7671:2018 The impact of Amendment 2 of the 18th edition (BS 7671:2018

The 18th Edition Amendment 2 IET Wiring Regulations contains important new information for all electrical installers and engineers. 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. BS 7671:2018+A2:2022 is the most widely accepted way to demonstrate compliance with the applicable legislation, and so if you are an electrical professional, you need to ensure that you are working to the new changes introduced in the latest version of this standard. What’s new about BS 7671:2018+A2:2022? Note: A new ‘foundation earthing’ requirement has been introduced into Chapter 54 to make arrangements for a suitable earth electrode provision for PEIs not connected to the LV public supply network.In medical locations of Group 1 and 2 Arc Fault Detection Devices (AFDDs) are not required to be installed. In medical locations of Group 0 Arc Fault Detection Devices (AFDDs) shall be used subject to a risk assessment. Precautions where particular risks of fire exist This new Chapter within BS 7671 covers energy efficiency measures, the interface with the smart grid, the management of electricity consumption, the management of renewable sources of electricity, and energy storage. This is a complex area and this article only mentions some of the many requirements concerning prosumers’ electrical installations (PEIs). These changes reflect requirements in European and international standards, as well as input from the Health & Safety Executive (HSE) and the Independent Review of Building Regulations and Fire Safety (2018). There is a wide range of microgeneration technologies, including solar PV, wind turbines, small-scale hydro, and micro combined heat and power (CHP).

Requirements for Electrical Installations

Arcs can be caused by insulation defects in cables, damage to cables by impact and penetration of nails and screws, loose terminal connections, and so on. An AFDD is designed to operate (trip) when a dangerous arc is detected by analysing the signature of the arc. Switching arcs caused by fluorescent lighting, for example, should not cause an AFDD to operate. AFDDs can be installed in distribution boards and consumer units to protect final circuits and should be installed in accordance with the manufacturer’s instructions. When installing components from a different manufacturer to that of the existing equipment in a distribution board or consumer unit, it is important to seek advice from the manufacturer that the new equipment is suitable and compatible. The concept of the PEI has been developed to answer the needs of the end-user. For example, where a PEI has a storage capability, the user could take advantage of low demand to store energy when its price may be lower. A collective PEI could, for example, be a group of single private houses, a group of flats in a building, or a group of small shops in a shopping centre with a common electrical power supply from one separate unit (generator/energy storage) producing energy and from the grid/supply network. Three operating modes are considered for collective PEIs. These are: BS 7671:2018+A2:2022 includes several new updates that are considered essential for anyone engaged in electrical installation activities. Collective PEIs are considered to be several consuming electrical installations connected to the same public distribution network and sharing one common set of local power supplies and energy storage equipment.Regulation 422.1 (Precautions where particular risks of fire exist. General) now introduces requirements for the fire safety design of the building(s) to be documented. Regulation 422.2 (Conditions for evacuation in an emergency) introduces separate requirements for escape routes and a new concept of ‘protected escape routes’. Reference to conditions BD2, BD3, and BD4 have been deleted. Chapter 44 Protection against voltage disturbances and electromagnetic disturbances Except for single dwelling units, for all other cases where the consequences of an overvoltage of atmospheric origin are considered to be intolerable, a risk assessment has to be performed to determine if protection against transient overvoltages is required.