Electrical connector including cable end seals and related methods

An electrical connector for a plurality of electrical cables may include an electrically conductive body having a plurality of spaced apart cable-receiving passageways for receiving respective electrical cable ends therein, and having at least one respective fastener-receiving passageway intersecting each cable-receiving passageway. The connector may also include an insulating cover on the electrically conductive body having a respective cable inlet aligned with each cable-receiving passageway. A respective cable end seal may be associated with each cable inlet. Each cable end seal may include an annular tear stop member including a series of concentric annular ribs, and a nipple coupled to an inner portion of the annular tear stop member so that the nipple is able to seal against smaller diameter electrical cable ends, and so that the annular tear stop member is able to be selectively torn and seal against larger diameter electrical cable ends.