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I have a 6mm2 cable direct from the consumer unit terminated in a box on the outside wall of the house (approx. 7m run in the house). In the future, I'd like to have a garden building approx. 10m from the house and run this electrical circuit to it. I have no plans of running anything particularly powerful in there. Approx. 15m further along I have a small garden shed that maybe in future a light or electrical supply might be handy. Although I've just missed my easiest chance to do something about it with a digger on site, I can still run a duct down the border without too much bother save a little digging. Then an electrician can run a cable through it in future. There shouldn't be any vehicles going over the duct but there might be in future. Occasional, not daily. I'm sure someone here will tell me what size SWA cable I should use for the total run, please do. I won't be doing anything electrical at the moment, just looking for a guide. What size twinwall duct should I be looking at for that cable? http://www.draindepot.co.uk/plastic-underground-ducting/electric-cable-ducting.html And what general practice should I follow? Depth? marking tape? corner radii? pulling strings? etc.
