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As part of the preparation for our re-build next year I have been making enquiries about the electricity supply. The current house is supplied by overhead lines (single phase) and there is a power line running down the side of the current house; see Topographic Survey.pdf (from my blog). I made enquiries about, disconnection and establishment of a temporary site supply, followed by re-connection to a 3-phase supply. I am looking at 3-phase because I may install an ASHP, the PV total capacity will be 9kW or more (up to 20kW split ENE, SSE, WSW so easier to split over phases. Also the kitchen if at full load would require 24.9kVA (2 x induction hobs and 4 ovens). My mother is in a wheelchair so the kitchen will be split level with duplication! Ordinarily the house will draw very little power but I would rather be prepared for the worst. I got the quote from the DNO of £15K + vat. The biggest chunk 10K being the replacement of overhead lines with insulated conductors rather than the current open wire ones. After a few questions it would appear that this is separate from the 3-phase issue and has to be done anyway as we are building within 3m of the current open wire overhead lines. Has anybody else come across a similar situation?
