The CAST Master Series® Transformers have mutliple taps and work great for larger CAST Lighting Installation. Robust inrush protection to guard against tripping of breakers. Resin-sealed toroidal core - ensures for the highest possible efficiency. "Full Load" commons configuration - ensures that the transformer can be loaded to its capacity. Extra-large 125 Amp terminal blocks - to accommodate up to (10) #12/2 wires.