KNOCKOUT DIMENSIONS N.P.T. 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 to 1.406 1 1/4" 1.719 to 1.766 1 1/2" 1.969 to 2.016 2" 2.453 to 2.500 2 1/2" 2.953 to 3.000 3" 3.578 to 3.625 3 1/2" 3.570 TO 4.040

Tables of U.S. rigid metal conduit sizes.

Do they fit every conduit on the market? What happens when the knockout is larger or smaller than the conduit? This guide will tell you. Conduit Knockout Size – Why Does It Matter? 1″ conduit requires a 1.375″ knockout; 3/4″ conduit requires a 1.109″ knockout; 1/2″ conduit requires 0.875″ knockout; 2 ½” conduit requires a 2.969 ...

The following dimensions have been developed by the Joint Sections Committee on Knockout Diameters and Fitting Dimensions and approved by the Codes and Standards Committee as a proposal to be considered by NEMA Sections for inclusion in existing standards publications.

The Joint Sections Committee on Knockout Diameters and Fitting Dimensions reviewed the existing industry practices and standards for knockout diameters and conduit fittings, and developed a table of dimensional relationships which assure no opening in the enclosure at the conduit entrance under normal conditions.

2010年3月19日 · It's a knockout spacing chart, which takes into account the locknut and the bushing. It's the distance, center to center, of adjacent knockouts. You look up the one pipe size down the left hand side, and the adjacent pipe size along the top. Follow both into the chart where they intersect, and that's the spacing between their centers.

Tight Seal Cable Grip - Knockout Hole Sizes PG mm inches 7 12.5 0.492 9 15.2 0.598 11 18.6 0.732 13.5 20.4 0.803 16 22.5 0.886 21 28.3 1.114 29 37 1.457 36 47 1.85 42 54 2.126 48 59.3 2.338 METRIC mm inches 12 12 0.472 16 16 0.63 20 20 0.787 25 25 0.984 32 32 1.26 40 40 1.575 50 50 1.969 63 63 2.48 ©2005 American Electrical.

Fitting Entry Knockout Dimensions T&B Liquidtight Flexible Metallic Conduit Fittings Through hole and knockout dimensions for liquidtight fittings TECHNICAL DATA - DIMENSIONS

3″ Trade Size conduit, drill using a 3 5/8″ hole saw or 3″ conduit knockout punch (3.539″ or 89.9mm).

NPT acc. to ANSI B1.20.1. Hole Sizes Technical Data - Cord Grips & Accessories. 866-722-2974. [email protected] www.sabcable.com. MO OD . Title: Cord Grip: Thread Dimensions & Hole Sizes Author: SAB North America Created Date: