This maybe what your looking for. Aluminum parallel or tee gutter tap connectors and also the insulating covers. Duel rated for cu or al, sizes from #14 to #500. With many configurations of 1 thru 4 taps and taps being parallel or 90 of the taped conductor. This one if from penn-union copp. The tapped conductor fits inside with a cover set screw seperate that slides on top (like you see on some meters).
