There is a Dutch company that makes a good outdoor pit for power distribution.
Check out
www.friand.nl The company is called Friand Electrotechnic.
The pit that they make is from polyurethane rubber, and has a 63A 3-phase ceeform socket mounted inside. The also make a tower that mounts onto the pit that can take other socket outlets of different sizes.
The pit is fitted with a sealing gasket which keeps the water out when the pit is closed. It is recommended though that the power supply be switched off when the pit is closed up, and that the usual RCD and MCB protection be installed.
We have used these in NZ and also in Australia, and they seem to be very high-quality items.
