Useless without drill for 230 V underground cables

Property me this 5-tier connector bought to extend a 5-pole underground cables in the garden. This fails, however, because the holes are so close to the entrance and exit of the connector that only cables up to 10mm diameter fit through there. 5-pole underground cables due to their double insulation usually much thicker. So a 5x1,5er underground cables has mostly 13 mm and a 15 mm diameter 5x2,5er most. In other words, without to drill the holes for both the closing plug and the housing with a corresponding drill, is not to use the junction box. Before drilling campaign however have the seals removed and speparat be increased accordingly. Whether and to what extent the part after the drilling is still tight, remains to be seen.

The only reason to assess the part of not only a star and to return as soon as possible, is that in this (including with 5.80 euros. Prime shipping quite inexpensive) part is done, the cable connection inside quite reasonable on a ring of Doppelschraubklemmen and I part the will seal in addition to the drilling with silicone or hot glue, so this type of connection is still better than any attempts at luster terminals, electrical tape and other sealing methods.

An alternative could be the connector of SLV be, junction box IP68 5-pin, which is more expensive, but according to this. Product Description dominated cable diameter up to 17 mm. I myself have so far only the only know the connection box IP68 3-Pole of SLV. The power but also of the sealing forth a much better impression than this "sad" part here.

Supplement (07.07.2013): When I bought the item, did not indicate in the item description, the item is only suitable for cables up to 8 mm diameter! This was supplemented later. However, I know of no 5-pin 220-volt cable is so thin that it could fit here. Particularly interesting is that Amazon itself under "Frequently Bought Together" below indicates a 3-pin NYY-J 3x1,5mm² underground cables. But even this has a diameter of 11-12 mm, making it unfit for the junction box!
Supplement (04.04.2015): Now, the information is not available to the maximum cable cross-section again in the item description.

An appeal to the conclusion:
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