I have installed a flat cable under a carpet in a commercial building years ago (expensive I believe). Do they make a cable to install in a residential home under the carpet to add a floor outlet? Is there something better than chisling out the cement and laying pvc?
The Golden Rule - "The man with the gold makes the rule"
I'd go along with Sven on that idea!. This is the same reason why flex's shouldn't be run under mats. The cable would be be safer from an electrical and fire safety point of view, if it was buried in conduit.
Let's face it, these days if you're not young, you're old - Red Green
FCC (flat conductor cable) is allowed ONLY in commercial occupancies and ONLY under carpet squares!
The logic is that if there's a problem (meaning a fire), it'll be more apparent in an office setting, and people will be awake and able to evacuate faster.
As for the carpet square thing--I'm guessing that it's because carpet squares are not stretched during installation, like wall-to-wall carpet on a roll. Even though FCC glues down pretty well to cement slab, it could still be damaged by movement of carpet over it.
So, get out the rotp hammer and set it to "chip"...do the job right, do it safe!