Wago 4 level same potential block din 35x15mm lock alphabetic 727 series wago 727 235024 000 wago 727 235024 000 4 level same potential terminal block with locking clips for din rail 35x15mm marked d c b a a b c d complies with en60715 all clamping points are short circuited colour orange 50pcs wago 727 235024 000 4 level same potential block d a a d lock orange 50pk