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The distance to the entrance to the wing is 27m. The rest of the house is reasonably centred round where the consumer unit will be. The room is about 6m by 4m and is a breakfast room (unlikely to thave many high current items attached). Thanks for the help

Does anyone have any experience / advice regarding DIY installation of domestic fire sprinkler systems?

My understanding is a 2.5mm ring main with a 32A mcb and RCD protection can supply 100m2 floor area, and is limited to 66 m cable to comply with the 4% voltage drop rule. I need to supply a wing of a new house which is too far away to manage only 66m cable. I could increase the cable to 4mm...