Why is PV rapid shutdown so important? What is the difference between PV rapid shutdown equipment (PVRSE) and a PV ...
We are using the 2017 National Electrical Code© (NEC©) in my jurisdiction and are encountering installers using Certified (Listed) photovoltaic ...
Is there a UL Standard for plant oil extraction equipment, and does UL Certify (List) this type of equipment? ...
The 2020 National Electrical Code© (NEC©) contains many changes regarding the use and limitations of reconditioned or rebuilt equipment. How ...
I have seen Listed LED tube lamps that incorporate a battery backup. Can they be used as emergency lighting or ...
To address the need for cord-and-plug-connected multiple receptacle devices to provide power to medical equipment in patient care areas of ...
Are there any Certified (Listed) products available to meet new PV rapid shutdown requirements inside the array boundary? ...
UL Product iQ database is the next generation of UL’s Online Certifications Directory and access to it is free; contains ...
Do I have to use a power supply/driver that is specifically Listed as an LED driver or low voltage lighting ...
It is the responsibility of the authority having jurisdiction (AHJ) to determine whether any field modifications are significant enough to ...