Is this from the point of view of the structure: e.g. not too deep; or from the electricians view: e.g. cables buried deep enough to not require mechanical or RCD protection?
to meet both you may find you need a considerably thicker wall ! You can usually cut up to 33% into a load bearing wall without seriously weakening it and a lot less for horizontal cuts, -but is it load bearing ? not all are, On the other hand the wiring regs assume the hazard is 50mm long screws and nails and require the cable to be deeper than that from the final surface, or the route to be visible, or conduit/trunking etc or to be in a corner. Mike.
to meet both you may find you need a considerably thicker wall ! You can usually cut up to 33% into a load bearing wall without seriously weakening it and a lot less for horizontal cuts, -but is it load bearing ? not all are, On the other hand the wiring regs assume the hazard is 50mm long screws and nails and require the cable to be deeper than that from the final surface, or the route to be visible, or conduit/trunking etc or to be in a corner. Mike.
