Knockout Trade Size Chart

Knockout Trade Size Chart – 3/4″ conduit, drill using a 1 1/8″ or 29mm hole saw. How do i know what size to order? The nominal knockout diameter for 3/4 inch conduit is 1.109 inches. Eko’s are routinely made for these common sizes.

The sizing charts are not guaranteed to provide the correct size. The electrical industry has common conduit sizes. 1/2″ conduit, drill using a 7/8″ or 22mm hole saw. Hole saw sizes and knockout punch equivalent.

Knockout Trade Size Chart

Sizing charts are to aid you in the picking the correct size, but many factors go into the perfect fit. The multiple knockout cluster is punched alternately in and out. The center knockout should have only one tie for conduit at least up to 3/4 (21) trade size.

Minimum dimension for larger sizes is necessary to clear the. Hub size knockout hole recommended (min to max/ inches) 1/4.540 to.570 3/8.671 to.701 1/2.859 to.906 3/4 1.094 to 1.141 1 1.359. 1/2 conduit size punch actually makes a 7/8 hole.

A knockout for 1/2 conduit is 7/8, but the outside diameter of a 1/2 emt fitting is about 3/4. 1/2″ conduit knockout punch is 0.885″ or 22.5mm. When specifying panel punch sizes, use the filters for shape, size 1 & size 2.

Size chart Knockout.ee