Trunking for cable buried in screed

Hi - I'm having an island installed as part of a new kitchen and it will have two sockets on it (one at either end). No hob or oven on it - just the 2x sockets.

Before the builders latex the floor (only needs one coat about 5mm), I want to chase out and bury the trunking for the cable to reach the island from the wall.

My question is does the trunking need to be anything special or can it just be normal plastic trunking? Also does it have to be at a certain depth for Building Regs?

I think I've read that if it's less than 50mm deep, it needs to be in metal trunking and more than 50mm can be plastic but would be grateful if someone could confirm if that's right.

Thanks in advance,

Just use the plastic, no need to go too deep - you risk damaging anything else that might be in the floor.

There are no specified depths for floors, the 50mm applies to walls only.

Great - thanks for answers.

Consider adding an extra spare duct (bigger the better), with a pull wire in it... one day you may want something extra in there, or maybe even now consider adding data cable.... useful for data points and all sorts of other things like sensors, thermostats etc.. It's not the sort of thing you ever regret doing.