Wago 4 level same potential terminal block din 35x15mm no lock plain 727 series wago 727 236 wago 727 236 4 level same potential terminal block without locking clips for din rail 35x15mm plain complies with en60715 all clamping points are short circuited colour orange 50pcs wago 727 236 4 level same potential block plain no lock din 15mm orange 50pk