Arlington Industries, Inc.
They install from inside or outside a metal panel or metal enclosure, through one of the existing 1/2" knockouts. There’s no need to modify the box or enclosure to accommodate the connector! GC50 and GC75 provide excellent strain relief for grounding conductors. Listed for use with stranded and solid copper and aluminum wire.
EPCO
Engineered Products Company's (EPCO) Splice Kits for direct burial applications provide a permanent water resistant seal eliminating crimping tools when splicing aluminum or copper conductors, cable deterioration and problems that can lead to open circuits and cable failure.