A splice assembly for joining two busway sections (1, 2) and for electrically connecting individual pairs of busbars (3, 4, 5, 6) extending from each of the busway section, the individual pairs of busbars being axially aligned and facing end surfaces, comprising: at least four electrically conductive elongated connector members (14, 15, 16, 17) having a generally u-shaped cross-section, each electrically conductive elongated connector member including a pair of louvers (35, 36) extending along respective sidewalls (20, 21) of the elongated members; a pair of insulative housing sections (18, 19), each said housing section including two sidewalls connected to a top/bottom wall extending transversely between the sidewalls, and an isolating wall extending transversely from the top/bottom wall midway between the two sidewalls to form two longitudinally-extending compartments, said compartments each being arranged to receive and hold respective ones of the electrically conductive elongated connector members, and said isolating wall electrically insulating an electrically conductive elongated connector member in a first one of the compartments from an electrically conductive elongated connector member in a second one of the compartments; and a planar insulator extending between a first pair of electrically conductive elongated connector members in one of the insulative housing sections and a second pair of electrically conductive elongated connector members in a second one of the insulative housing sections, wherein said splice assembly is assembled to said busbars by fitting said electrically conductive elongated connector members over axially aligned pairs of said busbars and fastening said insulative housing sections to each other to capture said busbars and planar member within a completed housing formed by said two insulative housing sections. at least four electrically conductive elongated connector members (14, 15, 16, 17) having a generally u-shaped cross-section, each electrically conductive elongated connector member including a pair of louvers (35, 36) extending along respective sidewalls (20, 21) of the elongated members; a pair of insulative housing sections (18, 19), each said housing section including two sidewalls connected to a top/bottom wall extending transversely between the sidewalls, and an isolating wall extending transversely from the top/bottom wall midway between the two sidewalls to form two longitudinally-extending compartments, said compartments each being arranged to receive and hold respective ones of the electrically conductive elongated connector members, and said isolating wall electrically insulating an electrically conductive elongated connector member in a first one of the compartments from an electrically conductive elongated connector member in a second one of the compartments; and a planar insulator extending between a first pair of electrically conductive elongated connector members in one of the insulative housing sections and a second pair of electrically conductive elongated connector members in a second one of the insulative housing sections, wherein said splice assembly is assembled to said busbars by fitting said electrically conductive elongated connector members over axially aligned pairs of said busbars and fastening said insulative housing sections to each other to capture said busbars and planar member within a completed housing formed by said two insulative housing sections.