1. IN A HIGH-CURRENT LOAD DEVICE HAVING AN ELONGATED AND SUBSTANTIALLY TUBULAR LOAD-COIL MEMBER WITH TWO BUS BARS EXTENDING ALONG THE MEMBER TO SUPPLY LONGITUDINALLY DISTRIBUTED CURRENT THERETO, A CONNECTOR DEVICE COMPRIING IN COMBINATION A PLURALITY OF EXCHANGEABLE BRACING UNITS EACH COMPRISING A GENERALLY U-SHAPED CLAMP STRUCTURE HAVING TWO LEGS STRADDLING SAID TWO BUS BARS IN FORCE-RESTRAINING ENGAGEMENT THEREWITH SO AS TO BRACE SAID LOAD MEMBER AGAINST MECHANICAL FORCES DUT TO THE FLOW OF CURRENT, SAID CLAMP STRUCTURE AND SAID BUS BARS BEING SECURED TO ONE ANOTHER SOLEY BY FRICTIONAL FORCE, SAID LEGS BEING ENGAGEABLE WITH SAID BUS BARS IN A DIRECTION SUBSTANTIALLY PARALLEL TO THAT OF THE FLOW OF CURRENT TO SAID LOAD MEMBER, SO THAT EACH BRACING UNIT IS ATTACHABLE TO AND REMOVABLE FROM SAID BUS BARS ALONG ONE SIDE OF SAID LOAD MEMBER IN A DIRECTION RADIALLY TOWARD AND