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British StandardBS 7671"Requirements for Electrical Installations. IET Wiring Regulations", informally called in the electrical communityThe "Regs", is the national standard in theUnited Kingdomfor electrical installation and the safety ofelectrical wiringin domestic, commercial, industrial, and other buildings, also in special installations and locations, such as marinas or caravan parks and medical locations[1]

In general, BS 7671 applies to circuits supplied at nominal voltages (Uo) up to and including 1000 volts AC or 1500 volts DC. The standard therefore covers the Extra Low Voltage (ELV) range (0-50V AC, 0-125V DC), and the Low Voltage (LV) range (50-1000V AC, 125-1500V DC). The frequencies covered for AC are 50 Hz, 60 Hz, and 400 Hz, used in the UK for houses, offices, and commerce. It did not become a recognizedBritish Standarduntil the publication of the 16th edition in 1992. The standard takes account of the technical substance of agreements reached inCENELEC.[2]

The current version is BS 7671:2018 (the 18th Edition) issued in 2018 and came into effect from 1 January 2019.[3]Amendment 1 to the 18th Edition was published in February 2020 but the only changes were to section 722 (Electric Vehicle Charging Installations). These changes came into immediate effect upon publication release, unlike previous amendments where 6 months elapsed before changes became compliant.[4]BS 7671 is also used as a national standard byMauritius,St Lucia,Saint Vincent and the Grenadines,Sierra Leone,Singapore,Sri Lanka,Trinidad and Tobago,Uganda,Cyprus, and several other countries, which base their wiring regulations on

Lincoln (/ˈlɪŋkən/) is a cathedral city and county town of Lincolnshire in the East Midlands of England. The non-metropolitan district of Lincoln had a 2012 population of 94,600. The 2011 census gave the urban area of Lincoln, which includes North Hykeham and Waddington, a population of 130,200.

Roman Lindum Colonia developed from an Iron Age settlement on the River Witham. The city's landmarks include Lincoln Cathedral, an example of English Gothic architecture and the tallest building in the world for over 200 years, and the 11th-century Norman Lincoln Castle. The city is home to the University of Lincoln and Bishop Grosseteste University, and to Lincoln City FC and Lincoln United FC.