The busbar system incorporates the use of 10mm thick flat bars either copper or aluminium. The holders are made from special formulated plastics, and can be mounted in any framework. During countless type testing up to 7100AMp, 105 kA/1sec. The holders have been tested rigorously again and again. The holders do not incorporate bolts for clamping but allow the bars to slide during heating and cooling. This eliminates the tisk of loose bolts and nuts