Which file should I choose?
Socomec-ATyS-Transfer-Switch-95533020-2D-CAD-Block.zip is the original NHP Electrical Engineering Products archive. Its 7 drawing/model members include 95533020_front.dwg, 95533020_back.dwg, 95533020_top.dwg; the complete filenames are in the file inventory. Match the member to ATyS Transfer Switch 95533020 before placing it.
Socomec-ATyS-Transfer-Switch-95533020-STEP-CAD-Block.zip is the original NHP Electrical Engineering Products archive. Open 95533020.stp inside it to place the original solid geometry in your 3D assembly.
