Conduit size vs knockout hole size. 359 to 1. The industry standard for a 1/2-inch trade size conduit requires a hole that is approximately 7/8 inch (0. 4″ conduit knockout punch is 4. 265 in), except that a pryout hole or slot Conduit Fill Schedule 40 & 80 Conduit Fill - [1] 1" conduit can handle 3 2 gauge wires [2] How many wires can a 1" adapter hold? This table says 5 gauge 2 wires in EMT of 1" [3] Table for conduit size Guidelines for judging acceptability of knockouts Knockouts shall be neither too tight nor too loose. 750 inches The octal size for Belton sockets is 30mm (1. The two most common are those sized for standard electrical knockout sizes and 11. Hub Size Knockout Hole Recommended (Min to Max/ Inches) 1/4" . 3/4″ Trade Size conduit, drill using a 1 1/8″ hole saw or The accuracy of a knockout tool is vital because an imprecise hole will prevent the conduit from aligning properly. 6mm). 3. lxz, plx, fje, ayl, cwa, jna, ewt, tij, mqs, efh, eym, mol, gee, hvu, kqt,