A joined wire fastener combination includes an outer sleeve having a pre-mounted implosive charge layer. A pair of enlargement members is provided. Each enlargement member is configured to be individually inserted into an adjacent, respective end of an associated stranded conductor. Each enlargement member has an outer diameter that is less than an outer diameter of at least one of the adjacent, respective ends of the stranded conductors, prior to insertion of the enlargement member into the respective end. Each enlargement member is individually inserted into the adjacent, respective end of the associated stranded conductor without the removal or partial removal of any strands of the associated stranded conductor.