I recently read this in a UL report:
Does anyone know what a "crows foot" is and how it works?Q:Reportedly, one manufacture of Rain tight EMT fittings includes a Torque requirement for the installed fitting. How can the torque be verified and enforced in the field?
A:EMT Fittings are Listed under the product category Electrical Metallic Tubing Fittings (FKAV), located on page 33 in the White Book and in UL's Online Certifications Directory at www.ul.com/database. Each of the manufacturers of EMT fittings Listed for rain tight or wet locations achieves their rain tightness by a different method. Therefore it is important to follow the assembly/installation instructions located on the shipping container of the fitting. A “crows foot” attachment is one method available as a torque wrench attachment for verifying compliance with torque specifications in the field.