Which file should I choose?
Socomec-ATyS-Transfer-Switch-957340201-2D-CAD-Block.zip is the original NHP Electrical Engineering Products archive. Its 7 drawing/model members include 95734020_front.dwg, 95734020_back.dwg, 95734020_top.dwg; the complete filenames are in the file inventory. Match the member to ATyS Transfer Switch 957340201 before placing it.
Socomec-ATyS-Transfer-Switch-957340201-STEP-CAD-Block.zip is the original NHP Electrical Engineering Products archive. Open 95734020.stp inside it to place the original solid geometry in your 3D assembly.
