![]() ![]() Reference to conditions BD2, BD3 and BD4 has been deleted. Regulation 422.2 now introduces separate requirements for escape routes and a new concept of 'protected escape routes'. Also, requirements have been added where cables should have an improved fire performance. Regulation 422.1 (precautions where particular risks of fire exist) now introduces requirements for the fire safety design of the building(s) to be documented. The use of AFDDs does not obviate the need to apply one or more measures provided in other clauses in this standard. For all other premises, the regulation recommends AFDDs for single-phase AC final circuits supplying socket-outlets not exceeding 32 A. It is now a requirement to protect final circuits supplying socket-outlets with a rated current not exceeding 32 A using arc fault detection devices (AFDD) in Higher Risk Residential Buildings, Houses in Multiple Occupation, Purpose-built student accommodation and Care homes. Chapter 42 Protection against thermal effects 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. 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. Regulation 411.3.3 has been redrafted and now has three indents. Reference to insulating sections has been removed. ![]() ![]() plastic, enter the building and are then connected to metallic pipes within the building, the metallic pipes within the building do not normally require protective bonding as they are unlikely to be extraneous-conductive-parts. 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.Ī note has been added clarifying that where non-metallic pipes, e.g. Some of the main changes are mentioned below. Section 411 contains a number of significant changes. Chapter 41 Protection against electric shock Part 2 - Definitionsĭefinitions have been expanded and modified. Minor changes have been made including reference to prosumers electrical installations and installing fibre optic cables. Part 1 - Scope, Object and Fundamental principles NOTE 2: BSI publishes information on the uses of withdrawn British Standards.Ī summary of the main changes is given below. NOTE 1: Completion of an electrical installation designed to the withdrawn standard can be subject to the contractual agreement between all parties involved. Users are responsible for their correct application.Ĭompliance with a British Standard cannot confer immunity from legal obligations. This publication does not purport to include all the necessary provisions of a contract. ![]()
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