Connect It 3 Way 30amp Junction Box Commonly used to join a 30A (or lower rated) ring main back up, to create a spur or to simply join 2 cables together. Can be used with up to three 2.5mm2 cables. The box has 4 entry points, the lid can be rotated to blank off any unused entries. 3 way junction box 30A/250V 3x2.5mm2 Dimensions: H:7.4cm x W:7.4cm x D:2.5cm