ZTS T-Series Automatic Transfer Switch Engineering Drawing

This document is an engineering drawing and specification sheet for the ABB Zenith ZTS T-Series automatic transfer switch, covering 260A and 400A models in 3-pole and 4-pole configurations with NEMA-1 enclosures. It provides detailed dimensional data, mounting hole locations, lug assembly options, wire bending space, seismic mounting instructions, and general construction notes per UL 1008 standards.