Which file should I choose?
Socomec-ATyS-Transfer-Switch-95533120-2D-CAD-Block.zip is the original NHP Electrical Engineering Products archive. Its 7 drawing/model members include 95533120_front.dwg, 95533120_back.dwg, 95533120_top.dwg; the complete filenames are in the file inventory. Match the member to ATyS Transfer Switch 95533120 before placing it.
Socomec-ATyS-Transfer-Switch-95533120-STEP-CAD-Block.zip is the original NHP Electrical Engineering Products archive. Open 95533120.stp inside it to place the original solid geometry in your 3D assembly.
