Reel with integrated clamp for attachment to hexagonal or round ground spike. The 3 35mm² copper cables, 10m long, are connected at one end to the reel's clamp. The other end is connected to the 3 Nevers conductive poles, enabling short-circuiting and earthing of the overhead MV network. The copper cable is connected and sealed using crimped and shrunk-on DIN 46235 lugs, with a 7mm open area on the Nevers pole side.