Discuss Individual RCBO in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

Hager board, rcd to left, main switch will be to the right.

Maybe not on older boards:

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IMG_8108 - Copy.JPG
 
Apart from assesing existing earthing/bonding and the supply/switchgear can acept new loadings has the existing have enough spare ways as you may be having to install a new consumer unit.The new circuits that you install will have to comply with BS7671 amd.3 at least.I assumming T & E in plastered wall etc in zones.If you are installing into existing C.U. your circuits in theory comply however comments on existing reg group 314 Division of installation.
 

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