Low-voltage lighting operates below line voltage; the NEC's Article 411 framework covers listed systems up to 30 VAC or 60 VDC. In commercial practice the term spans two distinct architectures — PoE lighting over Cat5/Cat6 cable and 48V connected lighting over 16/2 or 18/2 conductors — plus wireless controls. These architectures are not interchangeable.
Low-voltage lighting is the umbrella category, not a single system. NEC 411.3 sets the voltage limits and 411.4 requires listing; conduit flexibility under Article 725 depends on local amendments and plenum ratings.
This page routes ambiguous 'low-voltage' searches into the two architecture pages — PoE over Cat5/Cat6, and 48V connected over 16/2 — and corrects the legacy 'low voltage = PoE' conflation.
Not residential low-voltage lighting. In homes, "low voltage" usually means 12V landscape, under-cabinet, or track lighting run off a plug-in transformer. In commercial buildings it means a powered infrastructure layer - PoE over Cat5/Cat6, or 48V connected lighting over 16/2 - carrying both power and control data to addressable fixtures across a floorplate.
We advise before we quote. Tell us what you are working on and we will tell you whether this applies to your project.
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