Two and a half inch trade size knockout punch and draw stud for punching a hole for two and half inch electrical conduit.

Two and One Half Inch Electrical Conduit Dimensions

The spines of a few National Electrical Code books

Free National Electrical Code

A close shot of some three inch, schedule 40 PVC electrical conduit

Three Inch Electrical Conduit Dimensions

A three and a half inch conduit hand knockout punch with draw stud and accessories

Three and a Half Inch Electrical Conduit Dimensions

Some of my electricians hole saws and arbors

Electrical Conduit Hole Saw Sizes

Two concentric knockouts ready for removal

Remove Concentric Knockouts

Wiremold V5703 Support Clip with a toggle bolt through it ready to be pushed into the hole in the ceiling

Wiremold Garage Ceiling Outlet

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