As the cables would be buried in the ground they'd need to be armoured types (if not in steel conduit or the like) and suitable for the (possibly wet) conditions. Most manufacturers don't recommend embedding cables in concrete (some chemical reaction between the cement and plastic as the concrete cures I suspect) so you may need to duct the last bit through the slab in any event.

Are you cutting through an existing slab or this this a new build? Either way some thought might need to be given the the damp proof membrane (if any) - punching a hole through it for a cable might not be the easiest thing to make water-tight reliably (let alone cutting a trench through an existing one) - again water proofing sealant chemicals (e.g. bitumen based) might not be the best things to come into direct contact with cable sheaths.

Ducting the lot would also avoid possible damage to the cable while the concrete is being poured or other heavy building work (and indeed risk of copper theft while the building is still open to the elements and so less secure).

   - Andy.

As the cables would be buried in the ground they'd need to be armoured types (if not in steel conduit or the like) and suitable for the (possibly wet) conditions. Most manufacturers don't recommend embedding cables in concrete (some chemical reaction between the cement and plastic as the concrete cures I suspect) so you may need to duct the last bit through the slab in any event.

Are you cutting through an existing slab or this this a new build? Either way some thought might need to be given the the damp proof membrane (if any) - punching a hole through it for a cable might not be the easiest thing to make water-tight reliably (let alone cutting a trench through an existing one) - again water proofing sealant chemicals (e.g. bitumen based) might not be the best things to come into direct contact with cable sheaths.

Ducting the lot would also avoid possible damage to the cable while the concrete is being poured or other heavy building work (and indeed risk of copper theft while the building is still open to the elements and so less secure).

   - Andy.

I agree with Andy and would further suggest asking what would happen should there be a cable fault, or indeed a future change in spec... it sounds like excavating to re-lay would not be easy.