This publication has been further updated to include two subsequent amendments to the IET Wiring Regulations as BS 7671:2018+A2:2022. It should be noted that as the table in this section only offers overview guidance, the numbers used may not provide optimum economical options. However, if the 18th edition wiring regulations guide is the classroom-based literature, then the on-site guide is the live, on-the-job working document. The on-site guide also encourages the reader to consult the bs7671 in cases where regulatory compliance is unclear.

As alluded to, the guide is designed to help installations for electricians and trade professionals.The 18th edition on-site guide is an accompanying piece of documentation that complements the full 18th edition bs7671 wiring regulations guide.

Calibration and its certification comes in varying forms on new equipment and in this section, we will break it down into the three areas that we use to classify calibration state at the point of purchase. The IEE (Institution of Electrical Engineers) and the IIE (Institution of Incorporated Engineers) joined together in 2006 to form the IET (Institution of Engineering and Technology). The IET 18th Edition of BS 7671, the IET Wiring Regulations, came into effect on 1st July 2018, becoming the new national standard for electrical installation work in the UK.As its name suggests, it is intended for on-site consultation when working on single-phase and three-phase systems up to 100A.