Surge Protection Devices (SPDs) — Transient Overvoltage Protection and Lightning Protection for UK Electricians
Surge protection devices (SPDs) are now a mandatory consideration under the 18th Edition of BS 7671 Amendment 2. This guide covers Type 1, Type 2, and Type 3 SPDs, the 18th Edition risk assessment process under Regulation 443.4, location and wiring requirements, voltage protection levels, TT system coordination, and documentation obligations for UK electricians.
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