For the wiring of 4 underground cable with 3 wires totally unsuitable. Neither the terminal block is of sufficient size, still leaves the housing size, the cabling of 12 veins. On the use of WAGO terminals is not to be thought only.
For connection of two-wire, flexible leads, or max. 3 underground cables, the box can be recommended without reservation. In any case, however, has to be lived with a terminal block.
The Boxqualität is very good.