Ryan Mayfield led an informative discussion on the history of the NEC PV Hazard Control System rules and the latest changes to the UL 3741 standard.

US industry experts trace the evolution of PV rapid shutdown rules and outline how recent updates to UL 3741 are reshaping compliance pathways for rooftop and commercial solar in the United States.

FAIRPORT, N.Y. - Bosch Security Systems, Inc., a full-line manufacturer of high-quality security solutions, has met Underwriters Laboratories Inc. (UL) 864 9th ...

The UL certification mark hardly needs an introduction, given that it appears on more than 22 billion products each year. Those familiar with the sign will have the general sense of its meaning: A ...