This box has a solid bottom, the thing will fill up with water the first time it rains or the sprinklers come on. Also, you don't know if the lid is UV resistant or strong enough for walkover use, what's to say it won't get brittle and crack after 2 months in the sun? Then somebody steps into it and you have exposed wires and a broken ankle.
As I understand it, there are two code compliant options for a below grade situation:
-A handhole box
-A bronze "deck box" with listed potting compound installed*
*this may not even be legal, as I know there are restrictions if it's an Art 680 installation
