It may seem pedantic, but we go by the design date, not installation date, so if you alter the design, then the alteration has to conform with current regulations, so RCD protected, but the original design does not need altering. However missing RCD protection would still be listed with an EICR (electrical installation condition report) as in the main we don't know the design date, so assume designed yesterday. But would only get a C3 code, which means you can continue using it. Only exception is if some new equipment manufacturers instructions say must be RCD protected.
Read more: https://www.diynot.com/diy/threads/16-amp-for-ring-main-plugs.556885/#ixzz6dKiQMWJs
An electrician inspects and tests the installation against the edition of BS7671 in effect on the day of inspection (currently BS 7671:2018 amendment 1 - AKA 18th edition).
Read more: https://www.diynot.com/diy/threads/16-amp-for-ring-main-plugs.556885/#ixzz6dKiQMWJs
An electrician inspects and tests the installation against the edition of BS7671 in effect on the day of inspection (currently BS 7671:2018 amendment 1 - AKA 18th edition).
