Chapter 53 Protection, isolation, switching, control and monitoring
This chapter has been completely revised and deals with general
requirements for protection, isolation, switching, control and
monitoring and with the requirements for selection and erection of the
devices provided to fulfil such functions.
Section 534 Devices for protection against overvoltage
This section focuses mainly on the requirements for the selection and erection of SPDs for protection against transient overvoltages where required by Section 443, the BS EN 62305 series, or as otherwise stated.
Section 534 has been completely revised and the most significant technical change refers to the selection requirements for the voltage protection level.
On-Site Guide (BS 7671:2018+A2:2022) (Electrical Regulations) – This publication has been further updated to include two subsequent amendments to the IET Wiring Regulations as BS 7671:2018+A2:2022