If you are going to extend ground cables (i.e. in the ground) or you want extra taps on an existing ground cable, then you use a casting sleevet, soil sleeveor branch sleeve (making extra branches is also called splitting). You use a casting sleeve or ground sleeve for waterproof electrical cable connection in the ground. The individual electrical cables are connected in the casting sleeve. After this, the casting sleeve is filled with a synthetic resin. A watertight connection is created through the use of synthetic resin.There is then no short circuit.This cable casting sleeve is suitable for connecting (ground) cables. Universal model for cable 10 to 20 mm.