It is the responsibility of the authority having jurisdiction (AHJ) to determine whether any field modifications are significant enough to ...
Q. I know cord and plug-connected appliances are tested for leakage current but are hard-wired appliances tested for leakage current, ...
Q. Recent legislative changes in my state have resulted in many indoor horticultural grow operations. Does UL certify (list) grow ...
Do wire connectors used to make line side splices or taps need to have a short circuit current rating (SCCR)? ...
Do wire connectors used to make line side splices or taps need to have a short circuit current rating (SCCR)? ...
Are there any Certified (Listed) system-combination arc-fault circuit interrupters (AFCIs) for use in accordance with NEC 210.12(A)(4)? ...
EC-2017 Section 312.8(B) was added to allow installation of Listed power monitoring equipment inside panelboards. Where can I find power ...
Can UL shed some light on sizing of conductors and branch-circuit protective devices required for Certified (Listed) three-phase drives used ...
I see in the 2017 NEC Section 680.81 requires electrically powered pool lifts to be Listed. Does UL Certify (List) ...
I remember a few years back that circuit integrity (CI) cables all lost their Listings. Is this still true today? ...