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UL Question Corner: Low Voltage LED Luminaire Drivers

Q. I have encountered Listed low voltage LED luminaires shipped without a driver. Do I have to use a power supply/driver...

UL Question Corner: Field modifications of UL Certified (Listed) products, tapping...

Q. When a UL Certified (Listed) product leaves the factory, the UL Mark on the product...

Certification requirements for line side connectors

Q. Do wire connectors used to make line side splices or taps need to have a...

UL Question Corner: Installing power monitoring equipment in panelboards

NEC-2017 Section 312.8(B) was added to allow installation of Listed power monitoring equipment inside panelboards. Where can I find power monitoring equipment that is...

UL Question Corner: System combination AFCI’s

 Are there any Certified (Listed) system-combination arc-fault circuit interrupters (AFCIs) for use in accordance with NEC 210.12(A)(4)? How are they identified? Yes. UL does Certify...
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