BS 7671 - 18th Edition Wiring Regulations

Key learning points: • The terminology used for electrical installations. • The assessment of the installation that has to be carried out. • Protection against electric shock. • Protection against short-circuit currents. • Isolation and switching. • Protection against overloads. • Sizing conductors for the above. • Selection and erection of equipment. • Sizing of earthing and protective conductors. • Outline of the rules for inspection and testing. Changes from the 17th edition Changes for 18th Edition are suggested to be as follows: • Protection against over voltages - Clause 443 is likely to be overhauled. • Protection against fire - Chapter 42 will be updated with extra information on arc fault detection. • Electrical Embedded heating - Section 753 will be extended to include embedded electrical heating systems for surface heating, and will include de-icing and frost prevention systems. • Energy efficiency - There will be a brand new section covering energy efficiency.