An electrical box assembly (10, 350) comprising: an electrical box having a rear wall and a side wall with a cable opening having a dimension for receiving an electrical cable and an internal cavity; a cable connector (12, 160, 220, 282, 352) fixed to said electrical box entirely within said internal cavity, said cable connector being aligned with said cable opening in said side wall and having a cable passage, said cable connector having a body (34, 162, 222, 284, 354) with a first end (38, 164, 286, 302, 356) positioned adjacent to the cable opening on an inner face of the electrical box and a second end (40, 166, 226, 304, 358) opposite the first end and spaced from said first end and the inner face of the electrical box; a front wall (42, 172, 230, 290, 358) at said second end of said body and having an opening for receiving the electrical cable, said opening having a dimension so that said front wall abuts the metal sheath of a metal sheath cable with a plurality of conductors to allow the conductors of the cable to pass through the opening and prevent the metal sheath from passing through the opening; a wall (46, 168, 228, 292, 364) extending between said first end and said second end of said body; a first cable retainer (62, 182, 262, 300, 386) having a first end at the first end of the body and a second free end extending toward the front wall and towards an axis of the cable passage for gripping a cable in the electrical box; and a second cable retainer (74, 200, 252, 332, 396) having a first end (78, 324) at said first end of said body and a second free end (78, 196, 268, 324, 402) extending toward the front wall, said free end of said second cable retainer extending toward said front wall and toward the axis of the cable passage. an electrical box having a rear wall and a side wall with a cable opening having a dimension for receiving an electrical cable and an internal cavity; a cable connector (12, 160, 220, 282, 352) fixed to said electrical box entirely within said internal cavity, said cable connector being aligned with said cable opening in said side wall and having a cable passage, said cable connector having a body (34, 162, 222, 284, 354) with a first end (38, 164, 286, 302, 356) positioned adjacent to the cable opening on an inner face of the electrical box and a second end (40, 166, 226, 304, 358) opposite the first end and spaced from said first end and the inner face of the electrical box; a front wall (42, 172, 230, 290, 358) at said second end of said body and having an opening for receiving the electrical cable, said opening having a dimension so that said front wall abuts the metal sheath of a metal sheath cable with a plurality of conductors to allow the conductors of the cable to pass through the opening and prevent the metal sheath from passing through the opening; a wall (46, 168, 228, 292, 364) extending between said first end and said second end of said body; a first cable retainer (62, 182, 262, 300, 386) having a first end at the first end of the body and a second free end extending toward the front wall and towards an axis of the cable passage for gripping a cable in the electrical box; and a second cable retainer (74, 200, 252, 332, 396) having a first end (78, 324) at said first end of said body and a second free end (78, 196, 268, 324, 402) extending toward the front wall, said free end of said second cable retainer extending toward said front wall and toward the axis of the cable passage.