Understanding NEC Informative Annex I: Recommended Tightening Torque Tables from UL Standard 486A-486B Informative Annex I provides recommended tightening torque values for screw-type connections in power, lighting, control, and signal circuits. These guidelines, derived from UL Standard 486A-486B, ensure proper conductor termination and enhance connection safety. Purpose of Annex I Important Note: Torque checking after […]