NEMA Bulletin on Diameters and Fitting Dimension Requirements

This Bulletin was prepared by the NEMA Joint Sections Committee on Multiple Knockouts.
It is intended as a guide to manufacturers both in the design, tooling, and production of
knockouts; and in the development of material for the education of inspectors and users
regarding the proper removal of multiple knockouts. Download 


Click on Image to See in PDF and Download















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